Create a base maintenance form: design and implementation recomendations

TheMSsForum.com: The Microsoft Software Forum

The MSS Forum ‹ Winforms
- Archive
  - Biz
  - MCSE
  - CRM
  - Drivers
  - Framework
  - ADO
  - ASP
  - Compact
  - Forms
  - Dotnet
  - C#
  - VB
  - FontpageGen
  - Excel
  - WorkSheet
  - Exchange
  - Setup
  - Fox
  - Fontpage
  - ASP
  - IIS
  - Entourage
  - Money
  - Messanger
  - PocketPC
  - Powerpoint
  - Project
  - Publisher
  - Excel
  - VB
  - Security
  - Portal
  - Services
  - SQLServerDev
  - SVCS
  - SQLServer
  - VB
  - VC
  - MFC
  - ExcelGen

- Previous
  - 1
    - discarding user actions on a form while in busy state Hi, I can't seem to figure out a decent way to do this. I have a small window, and I need to discard user input while performing some lenghty task. For example, if the user wants to sync the app with a server, and this takes time. The proper behavior would be to change the cursor to a busy cursor, and prevent the user from touching any control on the form. Of course, painting should still be done, and the form should be able to move and resize (user actions like move, resize, maximize, minimize). When the job is done, the cursor changes back to the default one, and the user is able to interact with the received data. I've seen various sugestions: - disable the controls (or the whole form): not good, as the appearance of the controls changes dramatically; also, there seems to be problems with the cursor, it won't show properly on a disabled control (it displays the default cursor, not the one I set); - put a transparent form on top of the current form: I'm interested in this, if anyone can provide bits of code, I would really appreciate it. However, I don't know if this is supported on all systems (I'm interested mainly in XP, Win2003, and maybe Win2000). - catch all events in a WndProc: how do I do this? I've overriden the WndProc of my form, yet not all messages pass through this. I am still able to interact with the controls... I really appreciate any help on this, guys (and girls). :) Cheers, Cosmin. Tag: Create a base maintenance form: design and implementation recomendations Tag: 105920
  - 2
    - AnimateWindow and popup window I'mwriting a popup system for my application. I'm using the win32 call ShowWindow to show my window. Now I just stumbled on an other win32 call: AnimateWindow And while that seems very appropriate for the popups it has the very infortunate effect of showing a blank window! All the child control have disappeared! Any idea what going on? -- Regards, Lloyd Dupont NovaMind Software Mind Mapping Software <www.nova-mind.com> Tag: Create a base maintenance form: design and implementation recomendations Tag: 105917
  - 3
    - instal basics I can't install dot net charting ver4, build solution without error but in public MainForm(){ InitializeComponent() <<<<< Error ...... } Error= "Couldnot load file assembly 'dotnetCharting.winform", version 4.0.94892324, Culture=neutral, PublicKeyToken=c8374837849' or one of its dependencies can not be found Did i install incorrectly (if so please explain again for me) or my C# express doesn't fit this dotnetcharting ver4 ? Thanks Tag: Create a base maintenance form: design and implementation recomendations Tag: 105916
  - 4
    - ListView, ColumnHeader.Width when using multiple Fonts Here is an issue I've been struggling with for a day now, I wanted to share what happened with the group and find out if I have experienced (and worked around) a bug, or if there is something that I missed. I am using Visual Studio .NET 2003 with C#. The goal: I need to make sure that in a ListView control, the columns are drawn wide enough to display the text of the ListViewItems. Here's the catch: ListViewItem.Font may not be the same as the ListView.Font. Problem #1: ColumnHeader.Width does not take Font into account. Should be easy... just use (ColumnHeader.Width = -1), right? Sorry, no. Using the Width = -1 shortcut does not appear to take into account the fact that one of the ListViewSubItems in that column may be using a font that is wider than the ListView.Font. Workaround #1: I used ListView.CreateGraphics to create a graphics object, and then used Graphics.MeasureString() like so: // Assume listView.Font is "Microsoft Sans Serif", 8.25 // Assume listViewItem.Font is "Lucida Console", 8.0 Graphics g = listView.CreateGraphics(); foreach (ColumnHeader ch in listView.Columns) { ListViewItem.ListViewSubItem listViewSubItem = listViewItem.SubItems[columnHeader.Index]; int neededColumnWidth = g.MeasureString(listViewSubItem.Text, listViewSubItem.Font).ToSize().Width; if (ch.Width < neededColumnWidth) { // Make the column wider ch.Width = neededColumnWidth; } } Problem #2: In the above example, the listViewSubItem.Font returns the same value as listView.Font! I would have expected that listViewSubItems would inherit their font from the parent ListViewItem by default. Workaround #2: It is fortunate that the Font is identical for each element of ListViewItem.SubItems, so I just substituted "listViewItem.Font" for "subListViewItem.Font". // Assume listView.Font is "Microsoft Sans Serif", 8.25 // Assume listViewItem.Font is "Lucida Console", 8.0 Graphics g = listView.CreateGraphics(); foreach (ColumnHeader ch in listView.Columns) { ListViewItem.ListViewSubItem listViewSubItem = listViewItem.SubItems[columnHeader.Index]; int neededColumnWidth = g.MeasureString(listViewSubItem.Text, listViewItem.Font).ToSize().Width; if (ch.Width < neededColumnWidth) { // Make the column wider ch.Width = neededColumnWidth; } } Problem #3: With the above code, I can see that the columns are indeed resizing to become wider---but not quite wide enough to display all the text. Problem #4: Even when all the ListViewItems are using the same font as the parent ListView, using (Width = -1) appears to jam the text against the right side of the column---there is no padding on the right side of the column like there is on the left. After doing some research, I believe that this is related to some hardcoded padding versions of .NET, similar to this bug which says, "Internally, the Width of a ColumnHeader is padded with some predetermined constant when it is changed programmatically. This padding is not in effect if the Width of the ColumnHeader is changed through the user interface." http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B179988 This article implies that the hardcoded padding values are 29 for get_Width and 30 for set_Width. Final Workaround: Whenever adding or modifying a ListViewItem or one of its SubItems, I also call the following method instead of simply using (columnHeader.Width = -1;), which appears to do the trick /// <summary> /// Ensures that each column in the list-view is wide enough to the given text written /// in the given font. Normally you can use ColumnHeader.Width = -1 (or -2), but in /// this application there are several ListView controls that use a different font for /// its items and headers. ColumnHeader.Width autosizing appears to calculate the width /// for each ListViewSubItem using the ListView.Font instead of the font of the widest ListView.Item. /// This method is not thread-safe. /// </summary> /// <param name="ch">The column header to be widened. It must have a valid parent ListView.</param> /// <param name="subitem">The subitem whose width is to be measured.</param> private void SetColumnHeaderWidth(ColumnHeader ch, string stringToDisplay, Font fontOfString) { if (null == ch) { throw new ArgumentNullException("ch"); } ListView lv = ch.ListView; if (null == lv) { throw new ArgumentException("The ColumnHeader must have a parent ListView.", "ch"); } // This is used for measuring items for the arguments listview // to make sure the columns are wide enough to see their data. Graphics g = lv.CreateGraphics(); try { int subitemWidth = g.MeasureString(stringToDisplay, fontOfString).ToSize().Width; int defaultStringWidth = g.MeasureString(stringToDisplay, lv.Font).ToSize().Width; // HACK 10-17-06 SEC: When setting the column header width programatically, // it appears to set it just a hair too small for the text you specified. // I believe that this is related to some hardcoded padding where in older // versions of .NET, for example with this bug: // http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B179988 // "Internally, the Width of a ColumnHeader is padded with some predetermined // constant when it is changed programmatically. This padding is not in effect // if the Width of the ColumnHeader is changed through the user interface." // According to the aforementioned article, these hardcoded values are // 29 for get and 30 for set. if (ch.Width < subitemWidth + 29) { ch.Width = subitemWidth + 30; } } finally { // We *must* manually dispose of the graphics now that we are done with it, // per MSDN documentation for Control.CreateGraphics method: // "The returned Graphics object must be disposed through a call to // its Dispose method when it is no longer needed." if (null != g) { g.Dispose(); } } } Since I did say that this post is a question, my questions are: 1. Has anyone else encountered these issues and did you find a better way to resolve them? 2. Are any of these problems known bugs? If so, have they been resolved in more modern releases of Visual Studio .NET/Visual C# ? -- Sarah Cartwright Tag: Create a base maintenance form: design and implementation recomendations Tag: 105907
  - 5
    - Dataview.Rowfilter help hey guys I am tring to implement a filter in a datagrid. I am using a datatable which is the datasource for the grid. I need to filter set of rows. i.e. from row 1 to row count. i need to keep my row 0 intact, which is an option to add a new person. textbox key up code looks like this: string strRowFilter = String.Concat("Name LIKE '%", txtName.Text, "%'"); dv.RowFilter = strRowFilter; grdNames.DataSource = dv; plz help sunny Tag: Create a base maintenance form: design and implementation recomendations Tag: 105905
  - 6
    - CheckListBox row color ... Hi I have a CheckedListBox and I like to set the color of each row depending on a value of the specific item in that row. I can't find a DrawItem event like in the ListBox to hook on to ... Is there a way to achive this? I can get a rectangle for each specific item (and row). Is there a way to use this? Cheers. Richard Tag: Create a base maintenance form: design and implementation recomendations Tag: 105901
  - 7
    - custom listview - checkbox problem seeking a little input on a problem I am seeing - Background... I have developed a custom listview object in .NET fx 2.0 - it supports drag/drop operation, images in subitems, and sorting via specific datatypes - to provide the custom sorting functionality, I had to implement custom column headers and a column collection object for use in the listview for visual designer support. to support the image in subitems, i implemented a custom SubItem class.. the listview itself is OwnerDraw, but unless there is a specific need for owner draw (i.e., the SubItem is an image), I just set e.DrawDefault = true and let the base class take care of the drawing.. ## the problem I am seeing is when CheckBoxes=true on the ListView... The checkboxes are rendered, but it appears as though the vertical offset is not calculated properly (?)... All of the subitems (text) are rendered in the appropriate position, but the Checkbox is about "1/2 a row" too high within the ListView, which leads to the BackGround painting of the next Item to overlap the Checkbox. I have done a screen dump and checked the spacing, and the vertical spacing is correct, it's just higher than the rest of the listview item. I've tried to reproduce this behaviour using a simple OwnerDraw listview "test" object, but have yet been unable to emulate the problem... does anyone have any good ideas of where to start looking for the problem? I would suspect the column header to be the cause of the problem, but everything else renders with the proper vertical positioning. thanks - Tag: Create a base maintenance form: design and implementation recomendations Tag: 105896
  - 8
    - Strange error when app starts I have a strange (to me) problem with a c# forms application that I am developing. The application is installed on approxmatly 30 Windows XP machines and until recently they all worked perfectly. However since I have updated the application to a new version one of the machines fails with an unhandled exception when the application starts. The code in program.cs works fine and anything before the InitializeComponent(); method in the main form. As soon as the aplication enters the InitializeComponent method it crashes with mention of a filenotfound exception. I have copied the application folder from the failing PC to a good PC and it works fine which leads me to believe that it must be a system file that is missing. Likewise if I copy the program folder from a good PC to the failing one it again fails. I have reinstalled the app and the .Net 2 framework but to no avail. Having only done "basic debugging" I'm now a bit stuck. Any help would be appreciated Tag: Create a base maintenance form: design and implementation recomendations Tag: 105895
  - 9
    - Single instance help! Apologies for what must seem a newbie question (but I'm a newbie!) I'm building an MDI app, and have declared new instances of several child forms in a module. Then, in the parent form (where the IsMdiContainer property is set to True) I simply Import the module, and then behind some button click events I call the child forms with something like; FrmChild.Show() I'm doing it this way because I don't want users to create multiple instances of the same child form. However, I don't know how to set the mdiparent property of these child forms when I'm declaring them in a module. If I declare them in the code of parent form I'd use something like; Dim MyChild As New Form MyChild.MdiParent = Me MyChild.Show() But this doesn't work when declaring the child forms in a module. I know there's probably a very simple explanation. Please help! Tag: Create a base maintenance form: design and implementation recomendations Tag: 105894
  - 10
    - How to use standard expand/collaps buttons of TreeView Hi, I'm building my own tree-like control and would like to use the standard expand (plus-sign) and collapse (minus-sign) buttons used by the Windows TreeView control. How can I do that? Are the standard buttons icons that I can load from a Windows dll or can I paint similar icons myself, e.g. using the ButtonRenderer class? I'm using C# and .NET 2.0. Thanks in advance Ulrik Tag: Create a base maintenance form: design and implementation recomendations Tag: 105892
  - 11
    - DataGridViewComboBoxColumn Does anyone know how to set the selecteditem on a DataGridViewComboBoxColumn? I am bringing back a result set in the datagridview and need to pick a specific item from the DataGridViewComboBoxColumn of each row. Thanks Tag: Create a base maintenance form: design and implementation recomendations Tag: 105886
  - 12
    - Creating abirtray forms on UI thread Hi, I have a Logging class. Part of the job of the logging is to create a "tracewindowform", if required. It doesnt make sense to pass a reference to the UI thread, since the logging request might be from a non UI thread. Is there any way that an arbitrary thread can find a reference to its UI thread, or parent form, and then ask it to create a tracewindowform on its behalf? Shak Tag: Create a base maintenance form: design and implementation recomendations Tag: 105884
  - 13
    - How to set a C # form never be focused? Hello all, Here comes a C# Form focus controlling question. I write a C# program that only contains a form and will attach to a general process when I execute it, (e.g.: Notepad.exe) Now, the C# form can display successfully without stealing the focus from the Notepad process, i.e. show-no-activate, by using [DllImport( "user32.dll" ) ] and call the SetWindowPos as follows: {{{ SetWindowPos( handle, (IntPtr) HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE | SWP_SHOWWINDOW ); form.Visible = true; }}} My planned next step is to prevent the C# form from getting the focus when I click on it. That is, it is hoped that the focus should be always on the attached application such as Notepad. Does anyone know how to do that? James S. Jan shihyi@iis.sinica.edu.tw Tag: Create a base maintenance form: design and implementation recomendations Tag: 105877
  - 14
    - Writing Data In Tabular format in Text File. Hi guys, i want to write some data in tabular format in text file. i've data in strings and i want to write like this in file col1 col2 col3 d1 d1 d1 d2 d2 d2 d3 d3 d3 the problem is, i dont know how can i maintain spaces between the columns as i dont know which column will have what length of text. in c++, i think u can do by adding padding to make sure the alignment remains correctly but i dont know how can i do that in c#. i would appriciate your help, thanks Lucky Tag: Create a base maintenance form: design and implementation recomendations Tag: 105876
  - 15
    - How to store additional information in a DataGridViewComboBoxColumn column? .NETTers, My table for customer information contains CustomerName and CustomerID. In the datagridview, I am using DataGridViewComboBoxColumn to display the list of customers. When the user selects a customer, the corresponding cell gets filled with the name of the customer. However, in this process, I seem to be losing the customer ID. In my application, the name of the customer is only for display purposes. When OK is hit on the main Windows form, I need the actual customer ID. When the user selects the customer name in the combo box, I somehow need to retrieve the associated customerID and tag it to the current data grid row. This seems like a simple requirement. Is there a simple way to achieve this? I am trying to use standard datagrid functionality as much as possible. Thank you in advance for your help. Pradeep Tag: Create a base maintenance form: design and implementation recomendations Tag: 105874
  - 16
    - How to manully draw a horizontal scroll bar? In my subclass of ListBox, I set the DrawMode as OwnerDrawFixed. But this caused my ListBox had no horizontal scroll bar. How to manually draw it? Something I missed? Thx in advance. Tag: Create a base maintenance form: design and implementation recomendations Tag: 105873
  - 17
    - localization of Microsoft controls Hi; The asp:Login control has text in it such as "User Name:". Will that localize or do I need to do it? And if I need to do it, what is the best way to do it? -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm Tag: Create a base maintenance form: design and implementation recomendations Tag: 105871
  - 18
    - Show empty GridView as empty grid Hi; Is there a way to show a grid view with no data as a grid - but it just has a header or a header and 1 empty row? -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm Tag: Create a base maintenance form: design and implementation recomendations Tag: 105870
  - 19
    - resource in OnClientClick The following works great: OnClientClick='<%# Eval("UserName", "return confirm(\"Delete the user {0}?\");") %>' But I need to do this with a resource and the following does not work: OnClientClick='<%# Eval("UserName", "<%$ Resources:Windward, Admin_Confirm %>") %>' How can I accomplish this? -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm Tag: Create a base maintenance form: design and implementation recomendations Tag: 105869
  - 20
    - Std Out from Windows Forms I have read many questions and responses to this question, but before I give up and switch to a console application, I wanted to see if there was a way to reset Console.Out to be the console IFF the user executed the app from a console window already. I would detect this by the existence of command line parameters. Is there a text writer or listener that I could created to get the output to the console it was launched from? Thanks, Tag: Create a base maintenance form: design and implementation recomendations Tag: 105868
  - 21
    - <title> <%$resource%> </title> How do I put a resource in the title? I have the rest of my page localized but the title remains in English. -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm Tag: Create a base maintenance form: design and implementation recomendations Tag: 105867
  - 22
    - window form based application for different DPI settings I have developed a window form based application for tablet pcs. The problem I am facing is screen looks displaced on high dpi setting ie 120 how it make it work for both resolution Thanks Sudhee Tag: Create a base maintenance form: design and implementation recomendations Tag: 105866
  - 23
    - Verify a windows username? I have an vb20005 app where the admin can add a user to the local User table. I only want valid NT Users to be added to this table. At this point in time I have the user typing it in becuase I didn't see any sort of active directory dialog box. In my dataGridView cell validating function I want to verify that the string typed in is a valid user, is there somehting that can do this for me? I've looked around the windowsidentity class and couldn't find anything... any ideas? FYI: I would love some sort of active directlry dialog box that is plug and play that I don't know about which would erase the need for this verification. thanks, Tag: Create a base maintenance form: design and implementation recomendations Tag: 105864
  - 24
    - ClickOnce updates and Local Data Files Hello, I have a ClickOnce application that is set to check for updates on startup and has a small settings file that includes some user-specific information collected from a form that I want to persist across application updates. The first time that the application is updated a new directory is created, but the contents of the directory from the previous version are not copied. For all proximate updates, the contents of the new directories are copied as expected. The path I am creating to save the files I need to be copied is from the variable ApplicationDeployment.CurrentDeployment.DataDirectory. The manifest I am using is generated by Visual Studio. This is essentially the same problem as posed in the following post: http://groups.google.com/group/microsoft.public.dotnet.framework.windowsforms/browse_thread/thread/60ffb8264f7b0101/11c57e45fd5af983?lnk=st&q=clickonce+updates+user+data&rnum=2&hl=en#11c57e45fd5af983 What are the potential causes of this behavior? Thanks! Tag: Create a base maintenance form: design and implementation recomendations Tag: 105862
  - 25
    - LocalReport - Hangs when calling GetDataSourceNames() Hi, We are developing an application where we are using the LocalReport object as our server-side report rendering solution. All has gone well so far, but we have started hitting an issue with the LocalReport object. After we instantiate the LocalReport control, the first thing we do is point it to the RDLC file on the file system, then we call the GetDataSourceNames method to retrieve an IList of string objects. For some reason, execution almost always hangs on that call. I say "almost always" because it takes a random number of executions to get to that point. Sometimes the first time we render a report on the server it fails. Other times, I can get it to run two times, and the third time it hangs. This issue only occurs in Win2k3 machines. When run on XP SP2, it goes through just fine. All our dev machines are XP, so we developed our engine with no problem....then finally deployed out to Win2k3 server and started getting this. Our application is hosted in IIS and the objects are COM+ objects. We use .net remoting to call IIS. The code is as follows: Imports ctrl = Microsoft.Reporting.WinForms ... Private m_lclReport As ctrl.LocalReport ... Public Function RenderReport(ByVal reportFormat As String, _ ByVal reportDefinition As Biz.ReportDefinition) As Byte() Dim _list As IList(Of String) Try m_lclReport = New ctrl.LocalReport 'set the Path m_lclReport.ReportPath = reportDefinition.Path & reportDefinition.Name _list = m_lclReport.GetDataSourceNames() ... Execution freezes when it runs that last line. I've let it go for 1 hour+ and it never frees up and never thrown an exception. I've run it on multiple RDLC files, and the issue still occurs. I've tried it with reports w/ sub reports, and those without....same result. I've looked out there for known issues regarding LocalReport object freezing up...but have not found any. Anybody else out there have encountered this issue or anything similar? Thanks, Rob Tag: Create a base maintenance form: design and implementation recomendations Tag: 105861
- Next
  - 1
    - How to limit the size of a form based on a contained control Currently this code has to work in .Net 1.1 I have a form. I has a control (based on Panel) that occupies a large portion of the form. The control is anchored on all 4 sides. It is not docked on any side. The panel control resizes and repositions its contents based on its size. There is a minimum useful size for the panel control. I would like to limit the minimum size of the form based on the panel reaching its minimum size. My first thought is to set the minimum size of the form to the size of the panel plus its distance from the edges of the form. This would work for the simple case, but if the panel is placed inside another container control that is on the form then things get more messy. Is there a better way? Thanks ------------------------------------------- Roy Chastain KMSYS Worldwide, Inc. http://www.kmsys.com Tag: Create a base maintenance form: design and implementation recomendations Tag: 105858
  - 2
    - VS.NET 2006 Project Build Error Hi, In my C# projects I get the following error. Unable to copy file "obj\debug\test.exe to bin\debug\test.exe" Access to path "bin\debug\test.exe" is denied. I have binded the project to VSS 2006. Any thoughts Thanks, Tag: Create a base maintenance form: design and implementation recomendations Tag: 105855
  - 3
    - VS.NET 2006 Project Build Error Hi, In my C# projects I get the following error. Unable to copy file "obj\debug\test.exe to bin\debug\test.exe" Access to path "bin\debug\test.exe" is denied. I have binded the project to VSS 2006. Any thoughts Thanks, Tag: Create a base maintenance form: design and implementation recomendations Tag: 105854
  - 4
    - VS.NET 2006 Project Build Error Hi, In my C# projects I get the following error. Unable to copy file "obj\debug\test.exe to bin\debug\test.exe" Access to path "bin\debug\test.exe" is denied. I have binded the project to VSS 2006. Any thoughts Thanks, Tag: Create a base maintenance form: design and implementation recomendations Tag: 105853
  - 5
    - VS.NET 2006 Project Build Error Hi, In my C# projects I get the following error. Unable to copy file "obj\debug\test.exe to bin\debug\test.exe" Access to path "bin\debug\test.exe" is denied. I have binded the project to VSS 2006. Any thoughts Thanks, Tag: Create a base maintenance form: design and implementation recomendations Tag: 105852
  - 6
    - How to get a valid Image At startup my application loads an image from a file from disk. If the file is not there, I still need a valid System.Drawing.Image object but I don't know how to get one. //class MyImage class MyImage { //data member image System.Drawing.Image image; //constructor public Image():this(@"c:\Some Directory\Some Image.jpg"){} public Image(string a) { try { image=System.Drawing.Image.FromFile(a); } catch { image=... } } } Tag: Create a base maintenance form: design and implementation recomendations Tag: 105850
  - 7
    - Datagrid inside a Panel doesn't load records hi all, I'm using .NET Framework 2.0 and I've created a Panel with a DataGrid inside. This datagrid was created automatically by dragging & dropping into it a datasource. The problem is that if I put this panel into a Form I can't load any data from my db. If I drag & drop into this same Form the same datasource of the panel all datas are loaded correctly. why ? Thax at all Tag: Create a base maintenance form: design and implementation recomendations Tag: 105845
  - 8
    - Filtered/sorted Datagrid Hey Guys Alot of articles and alot of stuff still no answer. Please help me on this one. I need to get data out of a filterred selected row !!! ... this is how my code looks like.... On load: dv = SearchData.DefaultView; if (SearchData.Rows.Count >= 1) { grd.DataSource = dv; } I have datagrid which is filtered on keyup in a text box : string strRowFilter = String.Concat("FirstName LIKE '%", actual, "%'", "OR LastName LIKE '%" , actual, "%'"); dv.RowFilter = strRowFilter; grd.DataSource = dv; Then i need to get from the filtered ron in the datagrid. I am using currentcell changed DataGridCell tCell; tCell = grd.CurrentCell; grd.Select(tCell.RowNumber); MessageBox.Show(grd.CurrentRowIndex.ToString()); MessageBox.Show(dv.Table.Rows[tCell.RowNumber][0].ToString()); I need to get ID of this row from my column. I know i am doing sumthing wrong... plzzzzzz help Please help!!! sunny Tag: Create a base maintenance form: design and implementation recomendations Tag: 105844
  - 9
    - Use of Form.Owner property without the the owned forms always on Hello again! I haven't had any replies on my previous post about this issue, and I'm getting a bit anxious that this isn't technical possible to solve. I have tried to search for information on the net last week, without any luck. I've also tried to solve this matter with use of different windows API functions, but to no use. So I'm really hoping that someone can help me with this as soon as possible. The text in the original post was as follow: "I have a form (Form1) which works as the "main menu" from where I open many other forms (Form2, Form3 and so on). In order to make the "Sub Forms" (Form2 and Form3) minimize and close with the parent form (Form1), I use Form1 as Owner for the other forms (e.g Form2.Owner = Form1). As the documentation says, Owned forms are never displayed behind their owner form. But this is my problem. When a owned form (Form2) is partly dragged onto its owner (Form1), and I click to focus Form1, it is activated,but still behind Form2 (as expected). What I want is to have the forms behave just as if i didn't set the Owner property, but still with the "binding" where owned forms will close and minimize with the Owner. I'm also dependent on beeing able to loop through all the owned forms something like this: For Each ownedForm As Form In Me.OwnedForms ... Next So as you can see, I want all the benefits of use the Owner property on a sub form, but I do not want the Owner to always be behind its owned forms. Is there some way to acheive this? " Once again thanks for any help! Regards Øyvind Liland Tag: Create a base maintenance form: design and implementation recomendations Tag: 105838
  - 10
    - Databinding and Bindingsource issue Hi I have a form with master data and child records. Master data is taken care of by couple of textboxes and a datetimepicker and are bound to a bindingsource. For textboxes I have added bindings for Text and for datatimepicker it is for Value. Childrecords appear in a datagridview. When I change data in master records it does not switch on the dataset.haschanges switch while the child records are. Do i have to take any extra step to enble this. thanks Newish Tag: Create a base maintenance form: design and implementation recomendations Tag: 105835
  - 11
    - Bug: Windows Form + MainMenu ALWAYS produce wrong form Height Hello all, Finally I have decided to write about a bug in the winforms engine that has been nagging me since the early days of the NET 1.0 betas. It showed up in the final NET 1.0 release, in the service packs, in NET 1.1 and its service packs. And unbelievably but true it's still there in NET 2.0, CLEARLY visible for everyone who wants to see it. If a Windows Form contains a MainMenu then the Height of the first instance of the form will be 1 pixel short, while the next instances will all have an excess height of 18 pixels. The difference, 19 pixels, is related to the standard height of a menu bar. The bug exists even in NET 2.0 when you drag a MainMenu to the form. This happens in Windows 2000, Windows XP and Windows 2003. The new MenuStrip of NET 2.0 does NOT contain the bug. Let's reproduce the problem: 1. Create a new windows project with one form. Name the form class FormSize. Add a using System.Diagnostics; line. 2. In the property box, give the form the following properties: Location = 80,80 Size = 200,200 Startposition = Manual 3. Drag a MainMenu to the form. Create an item File on the menu and a subitem OpenForm. 4. Doubleclick on OpenForm and enter the following code: FormSize frm = new FormSize(); frm.Location = new Point(this.Left + this.Width, this.Top); frm.Show(); 5. In the Form_Load and Form_Activate events enter the following code: Debug.WriteLine("Form: Height=" + this.Height + ", Width=" + this.Width); 6. Compile and run the program with F5. You will discover that your form has a Width = 200 and a Height = 199. So one pixel short. Now click on you menuitem OpenForm. A second instance of your form will appear next to the first one. This second form has a Width = 200 and a height = 218. So 19 pixels HIGHER than the first form. The standard menu bar has a height of 19 pixels and that accounts for the difference. Easiest workaround: add the following statement to Form_Load: this.Size = new Size(200, 200); If you look at the generated code you will discover that the Size property in the property box is a so-called shadow property: from its value a ClientSize value will be calculated and this appears in the generated code. To complicate matters further the form DOES have a Size property, but this one is unrelated to the pseudo-Size property in the property box. I have no problem with the forms engine calculating a ClientSize from my property box pseudo-Size property. I have problems with the outcome of the calculation being wrong in runtime. THIS BUG IS NOT AT ALL 'ELUSIVE'. In fact it is glaring, VERY visible and VERY easy to reproduce. However, you will find NO MENTION AT ALL of this glaring bug in the Microsoft knowledge base. If you speak to Microsoft officials (I work for a Microsoft Gold Partner in Holland and we have regular contacts with Microsoft representatives) they invariably have NEVER heard of this glaring bug. You won't find it on the internet, except perhaps in some elusive posting of years ago. I cannot understand that this bug has been going unnoticed for so many years. It seems that nobody in the world has ever used a dotnet Windows Form application with a menu bar at the top in a real world application. Otherwise surely people SHOULD have noticed that ALL their forms are at least one pixel off. Yes sir, ALL your forms with a MainMenu are at least one pixel off. I hope that this time SOMEONE at Microsoft takes notice of this problem, tries to reproduce it and tries to explain to me how on earth such a visible bug has gone unnoticed for so many years. Do they really TEST their software in America? In Holland we programmers have the following saying for American software: "It compiles, so it's ready. Let's sell it" I also hope that you understand first THAT I am very annoyed and second WHY I am very annoyed and irritated. You see, what will happen if you show this bug to managers of, say, big financial companies & banks and tell them that the next version of their critical software will be using this framework. Ah, we were three digits off in the bank account number, so the deposit went to the wrong customer, but who cares? How trustworthy is the software if even such visible bugs go unnoticed? How about the bugs that are NOT so easy to notice? Ernesto. "You don't have to learn science if you don't feel like it. So you can forget the whole business if it is too much mental strain, which it usually is." Richard Feynman Tag: Create a base maintenance form: design and implementation recomendations Tag: 105833
  - 12
    - Looking for the best features, easy to use Grid Component Hi, Could anyone point me to a website which showing the current top 10 grid components or a featuring comparision? Thanks -- DHD Tag: Create a base maintenance form: design and implementation recomendations Tag: 105830
  - 13
    - TreeView is displaying two root Nodes I have a treeview that is displaying two root nodes.. Can someone give me a pointer on what this might be? I have created a componet and i inherit form system.windows.forms.treeview There are no errors and all starts fine; however i am seeing double.. :) help! please! here is my test project http://www.constructionsupercenter.com/SoftWare/Help/Visual%20Studio%202005/Windows/TreeView/SuperBrowser.zip ...... thanks erik EggHeadCafe.com - .NET Developer Portal of Choice http://www.eggheadcafe.com Tag: Create a base maintenance form: design and implementation recomendations Tag: 105827
  - 14
    - MenuStrip I'm using MenuStrip and C#. I want to close menustrip (items and subitems) when menustrip lose focus. Now, MenuStrip is open until I click on another control on form. This is no good for me. I want to close menu strip when it lose mouse focus without furher click on form. How to do that? charlie Tag: Create a base maintenance form: design and implementation recomendations Tag: 105826
  - 15
    - PrintPreviewDialog Using .net 1.1 (VS2003), if I turn on visual styles, PrintPreviewDialogs will show without pictures for any of the toolbar buttons. How do I make it work, without making my own PrintPreviewDialog? Tag: Create a base maintenance form: design and implementation recomendations Tag: 105825
  - 16
    - Show vs ShowDialog Hi, I know that htis has been asked many times, but I've had a look and none of the existing discussions seem to answer my question. I want to launch a non modal dialog along side my main app that will output trace data - so a textbox control on it will be added to quite a lot. Which method of the following is best for this, and why? //Flashes then disappears. Why? Thread thread1 = new Thread(delegate(){new Form().Show();}); //Form has own UI thread, and doesnt block parent. Thread thread2 = new Thread(delegate(){Application.Run(new Form())}); //Uses parent's UI thread, but doesnt seem to block parent either. Thread thread3 = new Thread(delegate(){new Form().ShowDialog();}); I'm using anonymous delegates here just for berevity, but assume that I have handles to the created forms. Thanks! Shak Tag: Create a base maintenance form: design and implementation recomendations Tag: 105824
  - 17
    - listbox event lost I have a form with a DeptList, an EmployeeList and a panel containing a bunch of textboxes for employee data, e.g. name, address, etc. The textboxes are bound to a datatable in a dataset. The DeptList SelectedIndexChanged event handler is used to populate the employeeList and its SelectedIndexChanged event handler is used to populate the textboxes. I also have added a handler for the DataColumnChanged event of the datatable Private sub OnColChanged(..) m_bDirty = true end sub and a handler for the panel validating event private sub DataPanel_Validating(..) if m_bDirty then QuerySave ( this uses a msgbox to query the user) end if end sub I now select an employee, enter some data in the text boxes and then click an unselectd row in the DeptList. With the code in the validating handler commented out, the DeptList SelectedIndexChanged event is raised and everything works as expected. With the code include however, the DeptList SelectedIndexChanged event either wasn't raised in the first place or was surpressed because the event handler is not called. In fact even with the code commented out, if I place a debup break point on the End Sub, the SelectedIndexChanged is not called. Of course since the SelectedIndexChanged is not called, nothing works correctly. The problem seems to be related to the listbox because if I click a btn outside the panel everything works as expected. The list box shows the correct line selected in either case. The same behavior occurs if I put a breakpoint on the end sub of the OnColChanged event handler, so that if I change some data and then click the list box, the execution breaks in the OnColChanged handler and afterwards the SelectedIndexChanged is not called. How do I get around this problem? Is there some way to re-raise the pending events for the listbox? -- JB Tag: Create a base maintenance form: design and implementation recomendations Tag: 105822
  - 18
    - ControlDesigner for custom win control Hello, I am making a custom win control which places some restrictions on the value of Text property of the control. While debugging i noticed that when the control is drag-dropped on a form during Design Time, the InitializeNewComponent method of the ControlDesigner is invoked. After this the text property of my control is set to the control name, which Visual Studio automatically assigns( name of the control object like textBox1 ...). Now if I want a default blank value in the control's text property i can set my own designer, override the InitializeNewComponent method and set the text value after i call the base InitializeNewComponent method public override void InitializeNewComponent(IDictionary defaultValues) { base.InitializeNewComponent(defaultValues); //over here text property is smthing like MyControl1 or MyControl2 MyControl control1 =this.Component as MyControl ; control1.Text = ""; } My question is why is this happening ?? Why is the text property of my control is set to the control name ? And how to supress this? Even in Microsofts controls like TextBox when I drag the control on the form during designtime the text property is set to the control's instance name and then immediately(within milli seconds) cleared. Thanks and Regards, Mohit Tag: Create a base maintenance form: design and implementation recomendations Tag: 105820
  - 19
    - Display area in panel Hi all, I'm trying to create a panel (call it Panel X) that contains three other panels (call them Panel A, B, and C). Panel A will be docked to top. Panel B will be docked to left and Panel C will have its dock set to fill. This is working. However, now I'd like to have Panel X provide the vertical scroll for the panels and have Panel C only provide a horizontal scroll if it has contents that go off screen (in width). The arrangement looks something like this: -------------------------------- | Panel A | -------------------------------- | | | |Panel B | Panel C | -------------------------------- I have this working - that is Panel C ONLY providing a horizontal scroll if it needs it and Panel X (contains all the panels) providing a vertical scroll ONLY if it is needed. However, I only have the above working statically. That is prebuilt. But, when the user is resizing things and moving things around in the above panels I need to always reset the AutoScrollMinSize based on those changes. Is there a way of determining the "viewable" area in a panel? For instance if Panel C gets a bunch of controls off to the right and below it's viewable area how can I determine the dimensions of the panel based on what the user can see? Novice Tag: Create a base maintenance form: design and implementation recomendations Tag: 105819
  - 20
    - Was Drawing.Icon.ExtractAssociatedIcon - wrong sized icon Hi Sorry about cross-posting, I posted this a couple of days ago on "microsoft.public.dotnet.languages.vb" and got no response... (using VS .NET 2005 on Windows XP...) I have a treeview which shows a mixture of records and files, what I'd like is for the files to look exactly as they would in Explorer.... I'm using Drawing.Icon.ExtractAssociatedIcon to extract the icon from a filepath etc. to be added to an imagelist used by a treeview. Everything works fine but the treeview icon appears to be 32x32 squashed to 16x16 instead of the proper 16x16 icon which looks much better. Using Drawing.Icon.ExtractAssociatedIcon to get icons (16x16) for list or treeviews looks awfull, I am guessing that what I'm getting is 32x32 squashed into 16x16. Anyone know a solution? Cheers Mark Tag: Create a base maintenance form: design and implementation recomendations Tag: 105815
  - 21
    - Memory leak in application Hi, We are using UIP for windows forms. When we navigate across screens in our application, the memory builds up making the system very slow. Does UIP hold any pointers to the forms I navigate to ? Which are the collections in the UIP that holds the pointers to the forms. Any help to address the memory leak is appreciated Thanks, Amith. Tag: Create a base maintenance form: design and implementation recomendations Tag: 105810
  - 22
    - Memory Leak Hi, We are using UIP for windows forms. When we navigate across screens in our application, the memory builds up making the system very slow. Does UIP hold any pointers to the forms I navigate to ? Which are the collections in the UIP that holds the pointers to the forms. Any help to address the memory leak is appreciated Thanks, Amith. Tag: Create a base maintenance form: design and implementation recomendations Tag: 105809
  - 23
    - Finding control's Parent at Design Time I have created a CustomControl that inherits from Textbox When i drag and drop my custom control on to a UserControl/ form i want to read the UserControl's property / form's property at Design Time Ex : When i drag and Drop my Custom Control, i want the constructor of my control to read my parent usercontrol's name property or any other property and do some operation based on it I already tried this.Parent but it returns a null value and throws an error. Anyhelp with this would be of great use to me Thanks, Suraj Guptha Tag: Create a base maintenance form: design and implementation recomendations Tag: 105808
  - 24
    - PropertyGrid and INotifyPropertyChanged .NET 2.0 Does the property grid listen for these events or some other form of notification that a property has changed for a selected object? My object implements INotifyPropertyChanged, and all other subscribers update except the property grid. Cheers, Stu Tag: Create a base maintenance form: design and implementation recomendations Tag: 105807
  - 25
    - Howto distinguish the Return- and Enter keys Hi everybody! In a GridView I have a key down handler like: CtrlDataGridView_KeyDown(object sender, KeyEventArgs e) { switch (e.KeyValue) { case Keys.Return: .... case Keys.Enter: // ERROR! same value as Keys.Return! ... } } How can I distinguish the return key from the numpads enter key??? Thx in advance, Harald Tag: Create a base maintenance form: design and implementation recomendations Tag: 105806

Hi all,

I'm doing a WinForm Project for .NET 2.0 platform and have some design and
implementation questions for my UI interface.

I have recently discovered that some complex controls (like DataGridView)
doesn't works well with visual inheritance (it can't be modified directly in
the inherited form although visibility of the control is public or
protected).

Now I have to do some simple maintenance forms to update/insert/delete
users, companies .

All are very similar: a DataGridView with some columns, a "Cancel" button
and an "Update" button.

The DataGridView would be linked to a BindingSource Control and this to a
Typed Dataset.

What is the best approach to have a base maintenance form to avoid coding in
the descendant forms?
I want to edit the columns from the DataGridView for every maintenance form
to adjust titles, size .

Thanks,
Alex B.

Top