tooltips for combobox ?

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  - 1
    - Double buffer a form Is there some trick to double buffer a whole form without having to subclass every single control on it to make each control double buffered? I've noticed that when I resize my form the controls on it starts flicking so much it's not even funny. I thought I could be clever and do something like this foreach(Control c in this.Controls){ // Set the value of the double-buffering style bits to true. c.SetStyle(ControlStyles.DoubleBuffer, true); } but that won't work since the SetStyle method is declared as protected in Control. (Why is it declared protected?) Martin Tag: tooltips for combobox ? Tag: 87123
  - 2
    - Goddamn Bug:ListView Updating Too Slow When Done Through Other Cla Please help us! We wasted a couple of days debugging a slow list view control in .NET and we realized that if you try to update the listview's listitems from a class other than the form on which the listview is placed, it will get REAL slow! This seems to be a bug which we hope to be fixed in later versions of .NET framework, but for now, we need a workaround quickly. Any comments? Thanx in advance. Tag: tooltips for combobox ? Tag: 87119
  - 3
    - richtextbox i got mdichild working. i am using withevents procedure. the message is not getting through richtextbox. but i can see debug window . here is code: class1.vb: Public Sub New(ByVal mParent As mainPirateChat) m_parent = mParent _Connection = New ConnectionFactory nStatus = New frmStatus nStatus.MdiParent = m_parent nStatus.Show() End Sub Public Sub New(ByVal mparent As mainPirateChat, ByVal szChannel As String) szTag = szChannel m_parent = mparent Me.NewChannel(m_parent, szChannel) End Sub Delegate Sub OneArgSub(ByVal rtb As RichTextBox, ByVal szText As String, ByVal szColour As String, ByVal szNum As Integer) Public deleg As OneArgSub Private Sub _Connection_onChanMsg(ByVal szNick As String, ByVal szChannel As String, ByVal szText As String) Handles _Connection.onChanMsg nChan = New frmChannel deleg = New OneArgSub(AddressOf DisplayMessage) deleg.Invoke(nChan.rtbChannel, "<" & szNick & "> " & szText.ToString(), GetUserColours.colourChat, 11) Debug.WriteLine("M :" & szText) End Sub Private Sub _Connection_onNickJoin(ByVal szNick As String, ByVal szHost As String, ByVal szChannel As String) Handles _Connection.onNickJoin Debug.WriteLine("joined :" & szTag & " " & szNick & " " & szHost & " " & szChannel) nChan = New frmChannel nChan.Text = szTag nChan.lstNames.Items.Add(szNick) nChan.Text = szTag.ToLower & " [" & nChan.lstNames.Items.Count & "]" If szNick <> _Connection.Nick Then deleg = New OneArgSub(AddressOf DisplayMessage) deleg.Invoke(nChan.rtbChannel, "<" & szNick & "> " & "[" & szHost & "] " & " has joined " & szChannel.ToString(), GetUserColours.colourJoin, 1) End If End Sub u can see in debug.writerline: M :looooooooooool ExTriaL!ExTriaL@163.121.174.87 PRIVMSG #usa :looooooooooool joined :#usa diana-- !~buttafly@203.175.254.38 #usa diana--!~buttafly@203.175.254.38 JOIN :#usa why is that not getting tru richtextbox. regards, Tag: tooltips for combobox ? Tag: 87118
  - 4
    - C# namespace for SQLServer connection dialog et al. Are there any C# namespaces that encapsulate the "Connect to SQL Server" dialog that appears when you launch the Query Analyzer? I would also be interested in dialogs to select the current database. If they do not already exist, how do I retrieve the data that is necessary to create such a dialog myself? Thanks in advance, Brian Hough Tag: tooltips for combobox ? Tag: 87117
  - 5
    - Maximising window using shortcut I created a windows form (using J#), set the BorderStyle to FixedDialog, and disabled the maximise box. All I wanted was that the user should not be able to change the size of the window. After my application was built, I created a shortcut to it. In the shortcut properties, I set the Run: property to "Maximised" from "Normal Window". When I started the application from the shortcut, it was maximised. I could neither resize the window, nor "restore" it (as expected). I think this behavior needs to be looked into. I feel that if an application's maximise button is disabled, then the shortcut should'nt be able to show the form as maximised. -- Sushovan, a crazy junior Tag: tooltips for combobox ? Tag: 87116
  - 6
    - DataSource Property and Thread Safety What happens if the object referenced by the DataSource property in a ListBox is updated by another thread? Is ListBox smart enough to check InvokeRequired before updating the GUI based on the change? IList doesn't publish any events, so it's not clear how the changes to the IList are being detected under the covers. Tag: tooltips for combobox ? Tag: 87109
  - 7
    - GUI issues in MDI application Hi , Please help me with the following issues as soon as possible. Thanks in advance for all of the timely help. I have a MDI windows application made in VC#. It has 3 child forms and each form contains 4 panels each. Besides this I have a login form which is not the MDI children . At run time the application start with a class (which ensures that there is only one instance of application), then control comes to login form and then comes to MDI parent form. I have some doubts and problems with GUI. 1. I am not able to disable the ControlBox of the MDI Children forms. I have set the following properties for all of the MDI child forms... ControlBox=False; MinimizeBox = False; MaximizeBox = False; I searched for the issue and found it as a big bug in DotNet on the following link ... http://www.dotnet247.com/247reference/msgs/33/169116.aspx Unable to remove the control box is messing up my application. 2. I read somewhere that if you don't set the project's starting object(at runtime) as MDI parent form, then MDI applications in DotNet create problems. Is it true ? 3. I have some common panel and functionlity. Right now that common panel has been replicated on each of the form. What is the best way to use these common panel and where to put the functionality. 4. How to change the the background colour of MDI Parent form. Right now I am using the following article but it is not changing the background colour of my form. The link is ... http://support.microsoft.com/kb/319465/EN-US/ 5. A strange issue .. Whenever I minimize the MDI parent form and restore it.back, the panels relocates in down direction. Each time I minimize it and restores back , it keep on moving in the downward direction. I don't have extensive experience of working in C#. Please forgive me if the issues seems to be silly and guide me. Thanking you, Rajat Tandon. A DotNet Learner. Tag: tooltips for combobox ? Tag: 87108
  - 8
    - ToolTip : Setting the pop-up location. With the [ToolTip] control - I'm wondering if there is a way to explicitly set the location that it pops up. From it's ref docs I can't see a way to set a location - and I'm wanting to have different tool-tips popup based on mouse activity within the bounds of a single control. Is this possible - or is there perhaps another control that can be used for pop-up tooltips? Many thanks everyone. === Phil Tag: tooltips for combobox ? Tag: 87107
  - 9
    - Embedding a form into a panel control I am embedding a form into a panel control using pnl.Controls.Add(form); This works pretty well, however there is one problem. The panel can resize, so there are cases when the panel size is smaller than the form embeded in it. The framework handles this problem by showing only a piece of the form that fits in the panel. Is there a way to add scroll bars to the panel so that the user can view the entire embedded form without resizing the panel? Is there any piece of code that handles this whole situation? Thank you Cezar Mart Tag: tooltips for combobox ? Tag: 87104
  - 10
    - Ad Rotator Windows Form I have a windows form app that has a web browser control on it. The browser control will rotate ads in and out. These ads are to be loaded on the local machine? I know asp.net has a rotator control, but windows forms do not. Any suggestions on this? Mark Tag: tooltips for combobox ? Tag: 87099
  - 11
    - DataGrid: Custom combo box column question Hi, I have made my custom combo box column based on several articles (http://msdn.microsoft.com/smartclient/community/wffaq/ctrlsp.aspx & other articles). I derived the custom column from DataGridTextBoxColumn, and show a combobox when editing a cell's entry. The problem is that when I press <enter> or <return>, the focus stays inside the cell. What should I do to have the default behaviour (move to the cell on the next row)? Thanks, -- Tom Tempelaere. Tag: tooltips for combobox ? Tag: 87097
  - 12
    - Calling Web Services from a Web Form throws CAS violation We created a C# Windows forms application and put the .EXE on our web server. We can download the executable from the web server to a desktop and it will display OK. When we click a button that causes the executable to call a web service on the same web server, we get the following code access security violation. -------------- begin violation ------------------------------------------- Could not talk to the web server. Error = 'System.InvalidOperationException: There is an error in XML document (1, 269). ---> System.Security.SecurityException: Security error. at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReader1.Read2_ReturnDS(Boolean isNullable, Boolean checkType) at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReader1.Read9_StorlibReadResponse() The granted set of the failing assembly was: <PermissionSet class="System.Security.PermissionSet" version="1"> <IPermission class="System.Security.Permissions.FileDialogPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1"/> <IPermission class="System.Security.Permissions.IsolatedStorageFilePermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Allowed="None"/> <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="Execution"/> <IPermission class="System.Security.Permissions.UIPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Window="SafeTopLevelWindows"/> <IPermission class="System.Net.DnsPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1"/> <IPermission class="System.Drawing.Printing.PrintingPermission, System.Drawing, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" version="1" Level="NoPrinting"/> <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1"/> <IPermission class="System.Security.Permissions.UrlIdentityPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Url="file://C:/winnt/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll"/> <IPermission class="System.Security.Permissions.ZoneIdentityPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Zone="MyComputer"/> </PermissionSet> --- End of inner exception stack trace --- at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle) at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader) at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at BackIssue.com.kcc.cad.Service.StorlibRead(String wildcard) at BackIssue.FormMain.searchForWildcard()' ---------------- end violation ------------------------------------------- What do I need to do to get past this violation? Joe Tag: tooltips for combobox ? Tag: 87094
  - 13
    - TABLE Hi, my code is: DataTable dt = myDataSet.Tables[0]; newDataSet.Tables.Add(dt); This code generate an error... "tha table dt already belongs to a dataset"... is there a solution to this problem? namely, I would like to reach this aim... is there another solution code? Thanks Tag: tooltips for combobox ? Tag: 87091
  - 14
    - General Informations about winforms I am searching for informations related to the creation of apps using winforms : i have to create a very nice appearance like the classic winamp or qcd. any links to tuto, guide, samples, or advices would be helpful ! Thanks. ********************************************************************** Sent via Fuzzy Software @ http://www.fuzzysoftware.com/ Comprehensive, categorised, searchable collection of links to ASP & ASP.NET resources... Tag: tooltips for combobox ? Tag: 87088
  - 15
    - CREATE A DATASET Hi, I would like to add three table to a DataSet: these three tables have tha same structure (columns name and type) but contains different records. When I try to add them, at the second table, I receive an error: "This table belongs already to another DataSet" Could you please help me to solve the problem Tag: tooltips for combobox ? Tag: 87087
  - 16
    - Build a DataSet Hi, in my SQL Server Database I've a table named Customer with the following column: CustomerID: primary key CompanyName: name of the customer Type: customer can be of type ROOT, BRANCH, COST_CENTER OwnerID: the key number (CustomerID) to which the customer belongs This table contains 3 types of customer: ROOT, BRANCH and COST_CENTER. A ROOT can have many Branches and Cost_Centers A Branch can have many Cost_Centers. The column OwnerID allows to identify to which that customer belongs: if the customer is a ROOT, this column has the same number of CustomerID. My question is: how can I create a DataSet with three table in relation, namely: ROOT, BRANCH and COST_CENTER relationed with column CustomerID and OwnerID The three table should show the tree like this: ROOT with its BRANCHES and COST_CENTERS for each BRANCHES its COCST_CENTERS Is it a problem if the table have the same structure for the three new? Thank you. Tag: tooltips for combobox ? Tag: 87085
  - 17
    - Adjust scrollbarvalue of TreeView Hi, I have 2 TreeViews. When i scroll one of them the other one must scroll also, so there are synchronized. Does somebody knows how to read out the scrollbar value of a TreeView and how to put a new value in? Thanx Tag: tooltips for combobox ? Tag: 87082
  - 18
    - Dutch User Group Conference, International Speakers!!! Please check this out: Software developers conference may 30-31th may Papendal/Arnhem The Netherlands 90 session covering C#, VB.NET, ASP.NET, Delphi 32 and Delphi.NET www.sdc.nl Software Developer Network www.sdn.nl The Software Developer Network is usergroup run by software developers for software developers. The goal of the Software Developer Network is to further the knowledge of its members and to form a network of developers. The SDN counts a total of 2000 developers. regards, Erik Visser Tag: tooltips for combobox ? Tag: 87081
  - 19
    - Currently position my windows form Hi How can i set Currently position of my window form. for example: x = this.Location.X; y = this.Location.Y; //(x=199, y =200); //i want to set my windows form in x(10,20)???? Thanks!! Tag: tooltips for combobox ? Tag: 87079
  - 20
    - howto create a simple boundable property I want to create a usercontrol usable in a winform. This usercontrol has some textbox and 1 simple property called MyValue. It's code is : private int myValue; public int MyValue{ get{ return myValue; } set{ myValue = value; } } I want to bind my Textbox and this property to dataset columns. Unfortunatly MyValue property cause adding new row in the dataset to fail. (BindingContext never position to the added row). My question: Is there anything to do to make this simple property bindable ? Thanks for any help. Tag: tooltips for combobox ? Tag: 87078
  - 21
    - DataGrid: Update datasource when closing form Hi, The situation is the following: A user is editing a cell in a DataGrid, and hasn't pressed <return> or <enter>, so the value is being edited. The user then closes the form. I would like to update the value to the data source if it is valid, or prevent closing the form if the edited value is invalid. Actually, all I need for this to accomplish are the following two functions: (1) A function that tells me whether or not the user is actually editing a cell's contents. (2) A function that tries to end the edit operation, and returns whether ending the operation succeeded. Ending the edit operation should fail if the value being edited is invalid (not valid). I haven't found these yet. About (1): I've checked DataRowView's IsEdit member, but I tested it and it seems to return true even if a user isn't editing a cell in that row. About (2) DataGrid has an EditEdit method. Sadly it returns false when no cell is being edited, so I can't make the distinction between an invalid entry or the fact that the cell isn't being edited. So using (2) alone doesn't work. Thanks for any help -- Tom Tempelaere. Tag: tooltips for combobox ? Tag: 87076
  - 22
    - ActiveX controls causing multiple calls to UserControl's OnLoad If I host ActiveX controls on a UserControl, the designer inserts calls to the controls' EndInit methods into the UserControl's InitializeComponent method. Every time EndInit is called (once for each ActiveX control), the containing UserControl's OnLoad method is called. Is this by design? If so, how am I supposed to deal with it? If I host the same controls on a Form, the Form's OnLoad is only called once, even though EndInit is called for each control. I posted about this a few days ago; still puzzling over it. http://groups-beta.google.com/group/microsoft.public.dotnet.framework.windowsforms/messages/3e6859dfbd8a4ecb,e2b3a9fdc23b41ec,73c8eafc4da4abb9?thread_id=8fcf88093bfceaf6&mode=thread&noheader=1&q=OnLoad+UserControl#doc_3e6859dfbd8a4ecb Tag: tooltips for combobox ? Tag: 87069
  - 23
    - major challenge : strange problem with drag&drop of Outlook2003 msg to vb.net form Hi, I'm desperatly trying to find how I can use drag and drop for an Outlook 2003 msg towards a VB.Net Windows application. Normally you should use Dim theSteam As Stream = CType(e.Data.GetData("FileGroupDescriptor", True), Stream) to capture the filename (which works great) and use Dim ms As MemoryStream = CType(e.Data.GetData("FileContents", True), MemoryStream) which returns nothing. The strange thing is that e.Data.GetDataPresent("FileContents") returns true. I also tried to copy an msg file to the clipboard and tried to download the message from the clipboard into my vb.net application but same behaviour. I also tested the same thing in c# but no changes. Can someone please advice what's wrong ? Is this a bug gentlemen from Microsoft ??? Thx for some feedback !!! Tag: tooltips for combobox ? Tag: 87068
  - 24
    - NUnit, NMock and DataBinding Hi all, Can anyone share their experiences (at a high level) mocking a database that fills a Dataset that is bound to controls in a UI? I'm finding the task rather daunting. Cheers, WNC Tag: tooltips for combobox ? Tag: 87063
  - 25
    - databinding issue Hi, I've got the following problem with databinding: If I bind a column of a dataset e.g. on the Text property of a Textbox, everything acts as expected, i.e. if you don't make any changes to the text in the textbox, the rowstate of the bound row stays unchanged. On the contrary, when you bind e.g. the Tag property of the Textbox, instead of the text property, the rowstate turns to modified when leaving the textbox (or by calling the bindingmanager.endcurrentedit method), even if you haven't changed a thing. This is very inconveniant because it causes unnecessary updates of the database. It seems that binding on the non default property (which is Text) causes changes of the underlying dataset. I assume it has somtehing to do with adding attributes to the properties ? or not ? How can we avoid this ??? Thanks !!! Tag: tooltips for combobox ? Tag: 87062
- Next
  - 1
    - How to close a form in C# I'm trying to close a form in C#. I have a vb background, so the question may sound dumb. In vb it is just me.close(). I've tried a bunch of ways to close the form but C# is acting pretty dumb also. I can't find a way to close it. Here are some of the things I've tried: private void button1_Click(object sender, System.EventArgs e) { // Form1 frmI = new Form1(); // DialogResult dr = frmI.ShowDialog(); Form1.Quit(); // this.Hide(); } The new form seems to recreate the form - that is a total nightmare. Hide doesn't end the program and Close just gets a message that says close is not defined. -- Regards, Jamie Tag: tooltips for combobox ? Tag: 87049
  - 2
    - Several bugs and workarounds In the course of writing my application, I have come across several = issues that seem to be Microsoft bugs. Following is a summary and possible workarounds. Jeffrey Tan, if you are reading this, please verify. Also, I'd like to know how to request fixes for these issues. 1) Sometimes the designer decides to spontaneously rearrange the tabs in = a TabControl. Status: Verified "known issue" - "Tab control TabPage order is = randomized" Workaround #1, suggested by Herfried K. Wagner Make sure you have always the first tab selected when recompiling Workaround #2: Delete and recreate the tabs after the call to = InitializeComponent() // Sample pages =3D new TabPage[] { pageOne, pageTwo, pageThree, pageFour, = pageFive }; myTabControl.Controls.Clear(); myTabControl.Controls.AddRange(pages); 2) BeginUpdate/EndUpdate does not work correctly when adding a single = item to a sorted ListBox Status: Verified "known issue" Workaround #1: Check the number of items to update and only perform = BeginUpdate/EndUpdate if >1. if (items.Count > 1) myList.BeginUpdate(); myList.Items.AddRange(items); if (items.Count > 1) myList.EndUpdate(); Workaround #2: Toggle the Sorted property. // Sample myList.BeginUpdate(); bool bug_workaround =3D myList.Sorted; myList.Sorted =3D false; myList.Items.AddRange(items); myList.Sorted =3D bug_workaround; myList.EndUpdate(); 3) A DataGrid leaves text on the screen after deleting a row containing = a selected (highlighted) cell. Happens when the columns are set to read-only, mostly visible when = deleting the last row. Status: Verified "known issue" Workaround: Set the read-only property of the whole DataGrid to true and = the read-only properties of the individual DataGridTextBoxColumn items to false. Don't know about cases when only some columns need to be read-only. 4) A DataGrid on a TabPage loses the data binding if the is deleted from = the TabControl. Since the only way to hide tab pages is to remove them, it is relevant. Status: Happens on my machine... Workaround: un-bind and re-bind the DataGrid when removing & re-adding = the tab page. Those are the bugs that I encountered. If you know of more, please post. --=20 Address email to user "response" at domain "alexoren" with suffix "com" Tag: tooltips for combobox ? Tag: 87044
  - 3
    - ANN: Dialog Workshop .NET 1.4.1 released Hello, Dialog Workshop .NET ver. 1.4.1 released! Using Dialog Workshop components you can speed up the creation of customized standard dialogs (based on the Windows Common dialogs) in your .NET applications without using WinAPI and resource editors! Many really powerful features are available: - extend your dialogs using your WinForms without writing a line of code; - custom dialog items captions; - customized dialog startup position; - custom file list view styles, etc. in Open/Save dialogs; - OpenFile dialog with MRU files tab; - design-time support, etc. Also Dialog Workshop for VCL.NET (Delphi.NET) is available now. Please visit our homepage for details: http://www.componentage.com Sergey Novogilov COMPONENTAGE Software http://www.componentage.com Tag: tooltips for combobox ? Tag: 87039
  - 4
    - Creating a scrollable container control I would like to create a custom container control which can scroll its child controls. I know that the AutoScroll property of ScrollableControl can mimic this functionality, but AutoScroll causes some behavior which is EXTREMELY obnoxious to my users, and I haven't been able to find a workaround. Consequently, I would like to be able to scroll a control without using the AutoScroll property. Is there any way to accomplish this? I've created the appropriate scrollbars, and now I just need to get the child controls to move. The SetDisplayRectLocation() function sounded like exactly what I needed, but it doesn't seem to work unless AutoScroll is enabled. Tag: tooltips for combobox ? Tag: 87033
  - 5
    - Windows Form in Shared Add-in not reading App.config settings Good Morning, I am developing an Outlook Shared Add-in using VB.Net. A Windows form has been added to the project, but is not reading the values in the app.config file during testing. The code (Sub Main) is below and displays "Blank connection string" is the label. It is called by an Outlook command button click event: Private Sub btnCTXNotesHistory_Click(ByVal Ctrl As Microsoft.Office.Core.CommandBarButton, ByRef CancelDefault As Boolean) Handles btnCTXNotesHistory.Click Dim frmNotesHistory As New frmCTXNotesHistory frmNotesHistory.Main() frmNotesHistory.Show() End Sub Sub Main() Dim sqlconCTXControl As New SqlClient.SqlConnection sqlconCTXControl.ConnectionString = ConfigurationSettings.AppSettings("sqlconCTXControl.ConnectionString") lblErrorMsg.Text = sqlconCTXControl.ConnectionString.ToString If lblErrorMsg.Text.Length = 0 Then lblErrorMsg.Text = "Blank connection string" End If End Sub Thanks. Tag: tooltips for combobox ? Tag: 87031
  - 6
    - InvalidCastException: (DataSet) DataGrid.DataSource I need some help please. Say you have a DataGrid and a DataSet, and you create a dataview to handle sorting and filtering and then you assign the dataview to DataGrid.DataSource. Once you did that you will get InvalidCastException if you do this: DataSet dataSet = (DataSet) dataGrid.DataSource; But I need to do that because I need to get the DataGrid's dataentries in a dataset and use XmlDataDocument to load the dataset and then write it to an xml file. Maybe my first design decision to assign dataview to the datasource should be reviewed. I don't know. Any comment will really help. Thank you. Tag: tooltips for combobox ? Tag: 87030
  - 7
    - Transparent UserControl I'm going Mad! Has anyone been able to give a UserControl a transparent Background I've tried... this.SetStyle(ControlStyles.SupportsTransparentBackColor, true); this.BackColor = Color.Transparent; this.UpdateStyles(); ... but it does not work. Tag: tooltips for combobox ? Tag: 87027
  - 8
    - Changing grid cells programatically I have a DataGrid and I'm changing the value in one of the cells programatically. Problem is, my change isn't being picked up (and saved in the underlying data source), unless I manually tab off the cell in the grid. I've tried calling BeginEdit and EndEdit around the code that populates the cell, to no avail. What am I missing? Tag: tooltips for combobox ? Tag: 87023
  - 9
    - TLSStream object problem I have an application that needs to send a HttpWebRequest to a secure server via https on a non-standard SSL port, I need to use port 5004. The error I get an the stack is shown below. The code works fine using the standard SSL port, but fails using port 5004, not a firewall issue. ERROR: Cannot access a disposed object named "System.Net.TlsStream". Object name: "System.Net.TlsStream". at System.Net.TlsStream.InnerWrite(Boolean async, Byte[] buffer, Int32 offset, Int32 size, AsyncCallback asyncCallback, Object asyncState) at System.Net.TlsStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback asyncCallback, Object asyncState) at System.Net.Connection.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state) at System.Net.ConnectStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state) at System.Net.ConnectStream.Write(Byte[] buffer, Int32 offset, Int32 size) Code: Errors out on the Poststream.Write line of code. Is there any way to Overload the webrequest object to force it to see the certificate. In debugging I am apply to query the certificate object and have not problem viewing its properties. Any and all help would be greatly appreciated. Thanks. Private Sub btnTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTest.Click Dim TransactionString As String = "" Dim Response As String = "" Dim VitalUri As New Uri("https://ssltest.tnsi.com:5004/") Dim RequestUri As New Uri(VitalUri, "test.php") Dim WRequest As HttpWebRequest 'For quick Connectivity Test use this abbreviated test record TransactionString = "D4.999995" & Chr(3) Dim LRC As String = LongitudinalRedundancyCheck(TransactionString) 'Dim htmlrequest As New HTMLRequest 'Response = htmlrequest.getRequest(requestUri, Chr(2) & TransactionString & LRC, "x-Visa-II/x-auth") Try ServicePointManager.CertificatePolicy = New TrustAllCertificatePolicy WRequest = CType(WebRequest.Create(RequestUri), HttpWebRequest) WRequest.Method = "POST" WRequest.ContentType = "x-Visa-II/x-auth" WRequest.ContentLength = TransactionString.Length + 2 'convert the transaction string to a Stream object Dim byteArray As Byte() = Encoding.UTF8.GetBytes(Chr(2) & TransactionString & LRC) Dim Poststream As Stream = WRequest.GetRequestStream Dim bob As String = WRequest.ServicePoint.Certificate.GetRawCertDataString Poststream.Write(byteArray, 0, TransactionString.Length + 2) Poststream.Close() 'assign the response object of WRequest to a WebResponse variable Dim WResponse As WebResponse = WRequest.GetResponse Dim ResponseStream As Stream = WResponse.GetResponseStream Dim StreamReader As New StreamReader(ResponseStream) Response = StreamReader.ReadToEnd ResponseStream.Close() StreamReader.Close() WResponse.Close() Catch ex As Exception Response = "ERROR: " & ex.Message & vbNewLine & ex.StackTrace End Try Me.txtResponse.Text = Response End Sub Private Function LongitudinalRedundancyCheck(ByVal Message As String) As String Dim sLRC As String = "" Dim iXor As Integer = 0 Dim Value1 As Integer = 0 Dim Value2 As Integer = 0 Dim Position As Integer = 0 Try If Message.Length >= 2 Then Value1 = Asc(Message.Substring(0, 1)) Value2 = Asc(Message.Substring(1, 1)) iXor = Value1 Xor Value2 Position = 1 Do While Position < Message.Length - 1 Position = Position + 1 Value1 = iXor Value2 = Asc(Message.Substring(Position, 1)) iXor = Value1 Xor Value2 Loop sLRC = Chr(iXor) Else sLRC = Message End If Catch ex As Exception sLRC = "" End Try Return sLRC End Function End Class Public Class TrustAllCertificatePolicy Implements System.Net.ICertificatePolicy Public Function CheckValidationResult(ByVal srvPoint As System.Net.ServicePoint, ByVal certificate As System.Security.Cryptography.X509Certificates.X509Certificate, ByVal request As System.Net.WebRequest, ByVal certificateProblem As Integer) As Boolean Implements System.Net.ICertificatePolicy.CheckValidationResult Return True End Function End Class Public Class RequestState Public request As HttpWebRequest Public requestDocument As String Public Sub New() request = Nothing requestDocument = "" End Sub End Class Public Class HTMLRequest 'Handler to synchronize with main thread Private allDone As New ManualResetEvent(False) Private _requestDocument As String Private _responseDocument As String Private _web As HttpWebRequest Private Sub ReadCallback(ByVal asynchronousResult As IAsyncResult) Dim result As String = "" Try 'get the information to pass on from the Async Object Dim myRequestState As RequestState = CType(asynchronousResult.AsyncState, RequestState) Dim myWebRequest2 As HttpWebRequest = CType(myRequestState.request, HttpWebRequest) Dim requestDocument As String = myRequestState.requestDocument 'get the stream to write the request to Dim streamResponse As Stream = myWebRequest2.EndGetRequestStream(asynchronousResult) Dim bytArray() As Byte = System.Text.Encoding.ASCII.GetBytes(requestDocument) streamResponse.Write(bytArray, 0, requestDocument.Length) streamResponse.Close() 'tell the main thread that writing stream is complete allDone.Set() Catch e As WebException result = e.Message Catch ex As Exception result = "Error: " & ex.Message allDone.Set() End Try End Sub Private Sub retrieve() Try Dim objWebResponse As WebResponse = _web.GetResponse Dim objStream As StreamReader objStream = New StreamReader(objWebResponse.GetResponseStream, System.Text.ASCIIEncoding.ASCII) _responseDocument = objStream.ReadToEnd 'close the objects objWebResponse.Close() objStream.Close() Catch ex As Exception _responseDocument = "ERROR retrieve: " & ex.Message End Try End Sub Private Sub send() Try 'Prepare objects to pass int async call Dim myRequestState As New RequestState myRequestState.request = _web myRequestState.requestDocument = _requestDocument Dim r As IAsyncResult = CType(_web.BeginGetRequestStream(AddressOf ReadCallback, myRequestState), IAsyncResult) 'wait till asychro is done allDone.WaitOne() Catch ex As Exception End Try End Sub Public Function getRequest(ByVal requestUri As Uri, ByVal requestText As String, ByVal sContentType As String) As String ServicePointManager.CertificatePolicy = New TrustAllCertificatePolicy _requestDocument = requestText _web = CType(WebRequest.Create(requestUri), HttpWebRequest) With _web .ContentType = sContentType .Method = "POST" .KeepAlive = False .ContentLength = requestText.Length .Timeout = 10000 End With Try send() retrieve() Return _responseDocument Catch ex As Exception Return "ERROR getRequest: " & ex.Message End Try End Function End Class Tag: tooltips for combobox ? Tag: 87022
  - 10
    - DataGrid: Custom ComboBox column problem Hay there, I'm writing my own DataGridComboBoxColumn because .NET 1.1 does not have one (I hope .NET 2.0 supplies one). I based it on this article: http://msdn.microsoft.com/msdnmag/issues/03/08/DataGrids/default.aspx I have a problem when there are two DataGrid's on one form, and when I switch focus from one grid to the other. To be more precise, when I'm editing a combo box column in one grid, and then click in the combo column of another grid an exception is thrown stating "The ListManager's position must be equal to rowNum. Parameter name: rowNum". I will post the code if anyone feels like digging into it. Anyway, perhaps someone has a better link with a how-to? Notes about the code: * The only thing that the PropertyEditorTable is used for in this context is for setting the DataSource of the ComboBox that edits the value. * The exception occurs when executing SetColumnValueAtRow in the comboBox_Leave event handler internal class PropertyComboBoxColumn : DataGridTextBoxColumn { protected PropertyEditorTable pe; private ComboBox comboBox; private CurrencyManager cm; private int iCurrentRow; public ComboBox ComboBox { get { return comboBox; } } public PropertyComboBoxColumn( PropertyEditorTable pe ) { this.pe = pe; this.cm = null; this.comboBox = new ComboBox(); this.comboBox.DropDownStyle = ComboBoxStyle.DropDown; this.comboBox.Leave += new EventHandler( comboBox_Leave ); } protected override void Edit ( CurrencyManager source, int rowNum, Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible ) { base.Edit( source, rowNum, bounds, readOnly, instantText, cellIsVisible ); if( !readOnly && cellIsVisible ) { iCurrentRow = rowNum; cm = source; DataGridTableStyle.DataGrid.Scroll += new EventHandler( DataGrid_Scroll ); comboBox.Parent = TextBox.Parent; comboBox.Location = DataGridTableStyle.DataGrid.GetCurrentCellBounds().Location; comboBox.Size = new Size( TextBox.Size.Width, comboBox.Size.Height ); pe.SetDataSourceForPropertyCombo( rowNum, source, comboBox ); int foundIndex = comboBox.FindStringExact( TextBox.Text ); if( foundIndex == -1 ) comboBox.Text = TextBox.Text; else comboBox.SelectedIndex = foundIndex; comboBox.Show(); comboBox.BringToFront(); comboBox.Focus(); } } private void DataGrid_Scroll(object sender, EventArgs e) { comboBox.Hide(); } private void comboBox_Leave( object sender, EventArgs e ) { SetColumnValueAtRow( cm, iCurrentRow, comboBox.Text ); Invalidate(); comboBox.Hide(); DataGridTableStyle.DataGrid.Scroll -= new EventHandler( DataGrid_Scroll ); } } Thanks, -- Tom Tempelaere Tag: tooltips for combobox ? Tag: 87018
  - 11
    - Data Grid: Adding new Rows Hi There is a databound grid that is being used in one of my Master - Detail form there I need to keep two columns hidden and assign Autogenerated values once a user adds a new record through the grid. can somebody please tell me how to do this; as i couldn't find a single event that is fired once a new row is added to the grid; and also i have tried quite a bit of fruite less methods like medling with the data source etc. can somebody please help me on this. thankx in advance Tag: tooltips for combobox ? Tag: 87010
  - 12
    - Want to check condition before switching between child forms In My MDI Application (One Mdi Parent and around 50 mdi child forms). On each child form is a database driven form, it means user can add,update etc. record in the database. i want to check certain condition before switching between mdi child forms, if condition is true then user should be allowed to move another mdi child form otherwise not. Steps to duplicate. 1. Open first child form1 2. Open second child form2 3. Press add child form2 4. now user tries to move on form1, and i want to validate (if operation is complete : Want to complete) if yes then focus should not be moved to form1 else it should be move to form1 I was able to acheive this in vb6 but not in vb.net , can you please suggest which event should i use? i tried with leave,enter and validating but could succeed. Dharmesh Parekh Tag: tooltips for combobox ? Tag: 87009
  - 13
    - changing a data type for a field on a report, using VS 2K3 and CR Hello, I have an app that uses Crystal Reports for .Net. I needed to change a data type of a field in the database and on the report. I thought it would work fine, however now the field is always blank on the report. The field is actually a fomula field based on a Date/Time datatype. I am assuming that because the field is no longer a Date/Time datatype in the database that this showing up blank. Does anyone know how to reslove this type of issue? Also does anyone know of any good books/reference material for using Crystal Reports bundled within .Net? Thanks, Chris Tag: tooltips for combobox ? Tag: 87008
  - 14
    - Interactive tooltips I want to extend the tooltip control to handle interactions with the user via clickable links within the text. It should work a bit like this example : http://www.dyn-web.com/dhtml/tooltips/hover-tip.html but of course I want this in windows forms not ASP.NET. Any guidance anybody ? Can it be done ? Tag: tooltips for combobox ? Tag: 87005
  - 15
    - ToolTip question How do I make a tooltip remain visible until the user moves the mouse ? Currently it stays visible for a few seconds and then disappears. Tag: tooltips for combobox ? Tag: 87003
  - 16
    - The object is currently in use elsewhere I have a splash screen that is displayed as the application starts. The splash screen has text dynamically added to it to indicate the authorisation mechanism and start-up progress. Due to the nature of the splash screen graphic we have to draw the text onto the splash screen instead of assigning text directly to each labels text property. Internittently, one of our XP Pro SP2 test machines gets the following error when displaying the splash screen that displays itself in a .NET Framework invoked dialog: Exception of type 'System.InvalidOperationException' The object is currently in use elsewhere. Stack Trace: at System.Drawing.TextureBrush..ctor(Image image, WrapMode wrapMode) at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent) at System.Windows.Forms.Control.InvokePaintBackground(Control c, PaintEventArgs e) at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent) at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs) at System.Windows.Forms.Control.WmPaint(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Label.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) The splash screen invokes itself on a separate thread via its ShowSplash method: /// <summary> /// Initializes and shows a new <see cref="SplashForm"/>. /// </summary> /// <param name="localisedApplicationName">The localised application name.</param> /// <param name="versionedAssembly">An <see cref="Assembly"/> from which version information can be extracted.</param> /// <param name="localisedCopyright1">A first line of copyright message.</param> /// <param name="localisedCopyright2">A second line of copyright message.</param> /// <param name="localisedSplashBackdropImage">The splash backdrop image.</param> public static SplashForm ShowSplash( string localisedApplicationName, Assembly versionedAssembly, string localisedCopyright1, string localisedCopyright2, Image localisedSplashBackdropImage ) { const string THREAD_NAME = "SplashScreen"; sShownInstance = new SplashForm( localisedApplicationName, versionedAssembly, localisedCopyright1, localisedCopyright2, localisedSplashBackdropImage ); // Create the thread and start it; when the instance is // closed, this thread will stop automatically... sThread = new Thread(new ThreadStart( DoSplashScreen ) ); sThread.Name = THREAD_NAME; sThread.Start(); // Return the shown instance return sShownInstance; } The label's paint event calls DrawSmearedText: private void lblNotice_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { DrawSmearedString( mNotice, lblNotice, Brushes.SteelBlue, Brushes.Red, e ); } private void lblBuildNumberAndDate_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { DrawSmearedString( BuildNumberAndDate, lblBuildNumberAndDate, Brushes.White, Brushes.Red, e); } private void lblPrerelease_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { DrawSmearedString( mPrerelease, lblBuildNumberAndDate, Brushes.White, Brushes.Red, e); } private void lblProgress_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { using ( SolidBrush smearBrush = new SolidBrush( Color.FromArgb( 64, 255, 255, 255 ) ) ) using ( SolidBrush textBrush = new SolidBrush( lblProgress.ForeColor ) ) { DrawSmearedString( mProgress, lblProgress, smearBrush, textBrush, e ); } } The DrawSmearedString method is as follows: private static void DrawSmearedString( string text, System.Windows.Forms.Label label, System.Drawing.Brush smearColour, System.Drawing.Brush overwriteColour, System.Windows.Forms.PaintEventArgs e) { // Our background colour changes from light to dark, so we can't draw // a single text colour across it. So, we do some shadow drawing by // smearing the text around in one colour, and then overwriting it in another. if ( text != null && text.Length > 0 ) { const int OFFSET = 2; for ( int x = 0; x <= OFFSET; x++ ) { for ( int y = 0; y <= OFFSET; y++ ) { // Assume the label has more than one row and create an offset rectangle on which to draw the smeared text RectangleF drawRect = new RectangleF( x, y, label.Width, label.Height); e.Graphics.DrawString( text, label.Font, smearColour, drawRect ); } } e.Graphics.DrawString( text, label.Font, overwriteColour, label.ClientRectangle ); } } I have managed to produce this error once on a W2K machine but not when using VS 2003 IDE. We are using .NET Framework v1.1 with appropriate service packs applied. Any ideas? Regards, Ian Rowland Tag: tooltips for combobox ? Tag: 87002
  - 17
    - NotifyIcon and Minimize Hello, I have a form with a notifyicon. I have set ShowInTaskbar to false. When I minimize the form, the form minimize, but there is a symbol on the windows desktop for the minimized form. This symbol is the same as for child windows which are minimized to its mdi-form. What I make wrong. Thanks Albert Krüger Tag: tooltips for combobox ? Tag: 87001
  - 18
    - How to give initial focus? Hi, I've programmed a simple form having some panes and one button. There is a basic thing I can't find a solution for: 1) I gave the button a TabIndex of 0. The main pane has a TabIndex of 1. Still the button doesn't get the focus when the form opens. Why? I tried to give focus to the button at Form_Load(), but CanFocus is false at that time. TIA, Axel Dahmen Tag: tooltips for combobox ? Tag: 87000
  - 19
    - How to set Form.Height > screen height? I have a irregular form having height > 600 pixel which can be moved when any part of it is clicked and dragged. Under resolution 800 x 600, the form will appear "truncated" when i move it upward... Later I found that the Height property will be automatically set to a number slightly larger than screen height (probably screen height + title height, sth like that) whenever a set a large value to it. Is there any way i can keep a large Height even under low resolution? Thanks!! Tag: tooltips for combobox ? Tag: 86997
  - 20
    - Need good design for startup project I'm building a winforms app using vb.net 1.1 and have 3 basic tiers on the client side. the UI, BLL and DAL. Currently everything is in one project and at some point I'll parse it out to a separate project for each Tier. Currently the startup object is Sub Main in the form called frmMain. frmMain is open through the life of the application session. What happens is from Sub Main it runs this code to get things started correctly: Shared Sub Main() Try System.Windows.Forms.Application.EnableVisualStyles() System.Windows.Forms.Application.DoEvents() System.Windows.Forms.Application.Run(New frmMain) Catch ex As Exception ErrLog(ex) End Try End Sub Then the Load event opens the login form before frmMain has a chance to be visible. If the login succeeds, then frmMain continues to open. If the login is canceled, then frmMain exits and the application quits. ============================ What I want to do is parse the login form into a new project and make that the startup project. Then as the user logs in it can check for updates and more easily replace any of the other DLLs (UI, BLL or DAL) with out having to replace its self (if I left the login form as part of the UI exe then I think it would be more difficult to upgrade the UI exe as it would have to replace itself.). I know there are new things coming available like no touch deployment, but I'm thinking that this design will still make things easier down the road when I use a better technology for automatic updates. So my question is: Can anyone give some advise on this strategy and; if frmMain is in the UI dll rather than being in the startup project, how can I make the login form go away and have frmMain persist as the main form through out the application session? Thanks. -- moondaddy@nospam.nospam Tag: tooltips for combobox ? Tag: 86992
  - 21
    - Could not deactivate CTRL+F4(close window) Despite setting controlbox property to false, CTRL+F4 shortcut is still working. Anyone can help me to disable CTRL+F4? Raj kumar Tag: tooltips for combobox ? Tag: 86990
  - 22
    - How to use c# creat dns server zone ? HI I try it code only creat DNS ResourceRecord,How to creat dns zone? thanks! this code: public void CreateRR(string zoneName, string rrTextRep) { if ( zoneName == null ) throw new ArgumentNullException("zoneName", "zoneName is null."); if ( rrTextRep == null ) throw new ArgumentNullException("rrTextRep", "rrTextRep is null."); InvokeMethodOptions options = new InvokeMethodOptions(); options.Timeout = new TimeSpan(0,0,0,5); ManagementClass rrClass = new ManagementClass(@"\\"+ System.Environment.MachineName +@"\root\MicrosoftDNS","MicrosoftDNS_ResourceRecord",null); //Get an input parameters object for this method ManagementBaseObject inParams = rrClass.GetMethodParameters("CreateInstanceFromTextRepresentation"); //Fill in input parameter values inParams["DnsServerName"] = null; //Don't need. inParams["ContainerName"] = zoneName; inParams["TextRepresentation"] = rrTextRep; //Execute the method try { ManagementBaseObject outObject = rrClass.InvokeMethod ("CreateInstanceFromTextRepresentation", inParams, null); PropertyDataCollection outProperties = outObject.Properties; foreach (PropertyData outProperty in outProperties) { Console.WriteLine("Property = " + outProperty.Name); } } catch { throw new ApplicationException ("CreateInstanceFromTextRepresentationmethod failed."); } } // End CreateInstanceFromTextRepresentation Method. Tag: tooltips for combobox ? Tag: 86983
  - 23
    - Opening a Word Document Hello, I have an application that opens a word document like so: With WrdApp .Documents.Open(System.Windows.Forms.Application.StartupPath + "\Template.doc", missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing) .Selection.Paste() .Visible = True .Activate() End With This works great but when I close word the application says This file is in use by aother application or user. (.......\Normal.dot) When I click OK I get a "Save As" Dialog Box that wants me to save the normal.dot When I click CANCEL and try to exit Word the following message is displayed: Changes have been made that affect the global template, Normal.dot. Do you wnat to save those changes? How do I make this stop doing this. I just want to open a document from a .NET application. Thanks, Chuck Tag: tooltips for combobox ? Tag: 86980
  - 24
    - Simple question: Updating a datasource This might be a simple question, but I havent found a solution anywhere: I do some stuff, and fill a DataSet from a database. After the tables have been processed (rows inserted/deleted/updated) I want to write the DataSet back to the database. My DataTable shall replace the table in the database. Consider the original DataAdapter disposed. My current workaround is to create a new DataAdapter and new DataSet, fill the new DataSet as I did from the start, replace ALL table rows with the rows from the first table, and finally call the Update() method to write back the changes. This strikes me as not the proper way to do things. I don't see the point in retrieving all rows from the database if all I want to do is overwrite the table. Can't I create a new DataAdapter and simply tell it to update the target table with my DataTable? Secondly, how do I insert a single row into the target Table? Is the proper way to write an SQL command and put it in an OleDbCommand object? Thanks! - Peder - Tag: tooltips for combobox ? Tag: 86979
  - 25
    - About Trim What is the best practice Trim (myStringvar) or myStringvar.Trim thks Tag: tooltips for combobox ? Tag: 86978

I have looked in every nook and cranny and I could not find any answer.

How do I implement tooltips in a combobox (while the combobox is expanded) ?

I want to have a tooltip for each item in the combobox. I know how to make
it work for a listbox, but not for a combobox.

So when you expand a combobox and start browsing the items, I want a tooltip
to appear for each item.

Someone please help!

P.S. (I cross posted to C# as well)

Thanks

Top

Re: tooltips for combobox ? by gaidar

gaidar
Sun Apr 24 12:04:50 CDT 2005

Maybe this can help:
http://www.vbaccelerator.com/home/NET/Code/Controls/Popup_Windows/Floating_Controls/article.asp

"Lankad" <lankad3k@hotmail.com> wrote in message
news:6dWdnQ4-rr3sB_bfRVn-gw@rogers.com...
>I have looked in every nook and cranny and I could not find any answer.
>
> How do I implement tooltips in a combobox (while the combobox is expanded)
> ?
>
> I want to have a tooltip for each item in the combobox. I know how to make
> it work for a listbox, but not for a combobox.
>
> So when you expand a combobox and start browsing the items, I want a
> tooltip
> to appear for each item.
>
>
> Someone please help!
>
> P.S. (I cross posted to C# as well)
>
> Thanks
>
>

Top