.net 3.0: transparent windows?

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  - 1
    - tooltip problem on framework 2.0 Hi all, I am experiencing a strange problem for the call setToolTip while running my application on frmaework 2.0. I have found 2 messages on google discussing the same issue but there are no replys It dumps saying something like System.InvalidOperationException: Adding the tip to the native ToolTip control did not succeed. at System.Windows.Forms.ToolTip.SetToolInfo(Control ctl, String caption) at System.Windows.Forms.ToolTip.CreateRegion(Control ctl) at System.Windows.Forms.ToolTip.CreateAllRegions() at System.Windows.Forms.ToolTip.get_TopLevelControl() at System.Windows.Forms.ToolTip.CreateRegion(Control ctl) at System.Windows.Forms.ToolTip.HandleCreated(Object sender, EventArgs eventargs) at System.Windows.Forms.Control.OnHandleCreated(EventArgs e) at System.Windows.Forms.Control.WmCreate(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Label.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) The strange thing about this that it cannot be caught in the try catch blocks. Actually I have set the tooltip to most of the controls in my application. It sets and displays it properly but somewhere in the middle it dumps. The trace I am getting won't tell me exactly to which tooltip it dumps so I am not able to figure out exactly. Does anybody has found any solution for such problem Thanks in advance Tag: .net 3.0: transparent windows? Tag: 105978
  - 2
    - The cost of Invoke()... can it be done faster? This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C6F459.ACA68A20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi guys.. I've got a function that copies one file to another location. The file = it copies is currently about 36mb. I've got an event being fired after = after every 32k buffer read from FileStream.Read(), containing the bytes = read thus far and the total bytes to read. When I don't invoke to update the UI status, the copy currently = completes in just under 3 seconds. With a UI status invoke, it takes 23 = seconds. Essentially this is my event handler: if (this.InvokeRequired) { this.Invoke(new ProgressRaiseDelegate(progEvent), e); } And progEvent simply involves setting a progress bars value to the = current value. Is there a way this can be significantly sped up? Cheers. ------=_NextPart_000_0008_01C6F459.ACA68A20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.5700.6" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Hi guys..</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I've got a function that copies one = file to another=20 location. The file it copies is currently about 36mb. I've got an event = being=20 fired after after every 32k buffer read from FileStream.Read(), = containing the=20 bytes read thus far and the total bytes to read.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>When I don't invoke to update the UI = status, the=20 copy currently completes in just under 3 seconds. With a UI status = invoke, it=20 takes 23 seconds.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Essentially this is my event = handler:</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT><FONT color=3D#0000ff size=3D2> <P><FONT face=3D"Courier New">if</FONT></FONT><FONT face=3D"Courier = New"><FONT=20 size=3D2> (</FONT><FONT color=3D#0000ff size=3D2>this</FONT></FONT><FONT = size=3D2><FONT=20 face=3D"Courier New">.InvokeRequired)<BR></FONT><FONT=20 face=3D"Courier New">{<BR>    </FONT></FONT><FONT=20 face=3D"Courier New"><FONT color=3D#0000ff size=3D2>this</FONT><FONT=20 size=3D2>.Invoke(</FONT><FONT color=3D#0000ff size=3D2>new</FONT><FONT = size=3D2>=20 </FONT><FONT color=3D#008080 = size=3D2>ProgressRaiseDelegate</FONT></FONT><FONT=20 size=3D2><FONT face=3D"Courier New">(progEvent), e);<BR></FONT><FONT=20 face=3D"Courier New">}</FONT></FONT></P> <P><FONT size=3D2><FONT face=3DArial>And progEvent simply involves = setting a=20 progress bars value to the current value. Is there a way this can be=20 significantly sped up? Cheers.</FONT></P></FONT></DIV></BODY></HTML> ------=_NextPart_000_0008_01C6F459.ACA68A20-- Tag: .net 3.0: transparent windows? Tag: 105974
  - 3
    - How to insert a row at the top of the datagrid? This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C6F42D.3D809360 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi: I have a problem to insert a row at the top of the datagrid. In the data = table (the datasource of the datagrid), no matter I insert the datarow = at 0 or rows.count-1 position, the new row always appear at the bottom = the datagrid, but I want it appear on the top. How can I do it? Thanks, Dennis Huang ------=_NextPart_000_0006_01C6F42D.3D809360 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2912" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT size=3D2>Hi:</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>I have a problem to <FONT size=3D1>insert a row at = the top of=20 the datagrid. In the data table (the datasource of the datagrid), no = matter I=20 insert the datarow at 0 or rows.count-1 position, the new = row always=20 appear at the bottom the datagrid, but I want it appear on the top. How = can I do=20 it?</FONT></FONT></DIV> <DIV><FONT size=3D1></FONT> </DIV> <DIV><FONT size=3D1>Thanks,</FONT></DIV> <DIV><FONT size=3D1></FONT> </DIV> <DIV><FONT size=3D1>Dennis Huang</FONT></DIV></BODY></HTML> ------=_NextPart_000_0006_01C6F42D.3D809360-- Tag: .net 3.0: transparent windows? Tag: 105973
  - 4
    - Access form from component Hello. I have created a custom component. At run-time I need to access the Form that is hosting my component from inside my component. Is this possible? Thanks in advance. Tag: .net 3.0: transparent windows? Tag: 105972
  - 5
    - DataGridView / EndEdit and CellValidating event Hello I have a DatagridView with a checkBoxColumn. When I Check with mouse a row (and so toggle the checkBox) I want launch a EndEdit() method on my DataGridView I can do this with an tips : I create a class inherits from DataGridViewCheckBoxCell and plug an instance on my column by CellTemplate property, this class override OnMouseDown method ... BUT I want launch something like CellValidating event on my datagrid (or somewhere) to intercept the check and perhaps cancel the user's change (becaule a rule will not be respected) this event is not launched !! :-( It is just launched When I change the current cell !! How can I do this ? It seem very basic functionnality, It is certainely possible to do this, but How ???? thanks for your help ! Tag: .net 3.0: transparent windows? Tag: 105971
  - 6
    - Question regarding MDI Hello, I am VERY new to WindowsForms but VERY eager to learn. I am in the process of creating an MDI application to manage High Sensitivity Customers within our organization. I am working on the first form which will host the login controls to the application. I noticed that when I change the type of the form to an isMDIcontainer to TRUE the background color of the application changes to dark grey. No matter what I do I cannot change the background color. This is really ugly. I even tried a background color however, when I change the controls background to transparent, they are wrapped with that dark grey color instead. Does anyone have any ideas or resources I can view to rectify my issue? Thank you very much. Tim EggHeadCafe.com - .NET Developer Portal of Choice http://www.eggheadcafe.com Tag: .net 3.0: transparent windows? Tag: 105962
  - 7
    - ListView ownerdraw column headers I have a question for anyone who might be able to help... I am in the process of building a custom listview, and am dealing with sorting, and wanting to use the asc/desc sort indicators in the column header... i have tried setting the parent's SmallImageList property and using those images as sort order indicators, but the ListView items also try to use those images, which screw up the way the ListView renders in some situations. Drawing the column header is an easy enough way around this, but I am running into trouble with dealing with the mouse over behaviour. I attempt to access the MousePosition, and then test if the bounds of the columnheader contain that point. This works just fine - however... When you are moving from one column to another, from right to left (this is the important part), the rightmost column (the one you just came from) still evaluates the e.Bounds.Contains(this.PoiintToClient(Control.MousePosition)) expression to 'True'... Additionally, in the same Right to left motion, the columns' "hover" seems to be off by one (delayed) as you mouse over... So, if we have 4 columns {0,1,2,3} and we are moving Right to Left, without leaving the vertical bounds of the ListView's column header... If the mouse cursor is over column... [3] --> [3] is "highlighted" [2] --> [3] is "highlighted" [1] --> [3] and [2] are "highlighted" [0] --> [3] [2] [1] are all highlighted. I don't understand entirely why this might be. Since it doesn't exhibit any of this behaviour at all when you move over the columns from Left to Right, I am guessing that the column header might "virtually" extend all the way to the left, or something like that... Is there a better way to determine whether or not the mouse is hovering over the specific bounds of the column header? Find the ColumnHeader OwnerDraw code below... Thanks for any help you might be able to provide... protected override void OnDrawColumnHeader(DrawListViewColumnHeaderEventArgs e) { e.DrawDefault = false; Color normal = SystemColors.Control; Color hover = SystemColors.ButtonHighlight; Color hoverPress = Color.LightGreen; Color normalBorder = SystemColors.InactiveBorder; Color hoverBorder = Color.FromArgb(227,145,79); Color verticalDiv = SystemColors.Highlight; RectangleF txtRect = RectangleF.Empty; Point mPoint = this.PointToClient(Control.MousePosition); bool MouseHover = e.Bounds.Contains(mPoint); Brush bgBrush; if (MouseHover) bgBrush = new SolidBrush(hover); else bgBrush = new SolidBrush(normal); e.Graphics.FillRectangle(bgBrush, e.Bounds); SizeF txtSize = e.Graphics.MeasureString(e.Header.Text, this.Font); switch (e.Header.TextAlign) { case HorizontalAlignment.Left: txtRect = new RectangleF( 4 + e.Bounds.Left, (e.Bounds.Height - txtSize.Height) / 2, txtSize.Width, txtSize.Height ); break; case HorizontalAlignment.Center: txtRect = new RectangleF( (e.Bounds.Width - txtSize.Width) / 2 + e.Bounds.Left, (e.Bounds.Height - txtSize.Height) / 2, txtSize.Width, txtSize.Height ); break; case HorizontalAlignment.Right: txtRect = new RectangleF( (e.Bounds.Width - (e.Bounds.Width - txtSize.Width)) + e.Bounds.Left, (e.Bounds.Height - txtSize.Height) / 2, txtSize.Width, txtSize.Height ); break; } e.Graphics.DrawString(e.Header.Text, this.Font, Brushes.Black, txtRect); Brush divBrush = new SolidBrush(SystemColors.Highlight); Brush borderBrush = new SolidBrush(normalBorder); //Draw the vertical divider if we aren't hovering if (MouseHover) borderBrush = new SolidBrush(hoverBorder); if (!MouseHover) e.Graphics.DrawLine(new Pen(divBrush, 1.25F), e.Bounds.Right - 2, e.Bounds.Top + (0.20F * e.Bounds.Height), e.Bounds.Right - 2, e.Bounds.Bottom - e.Bounds.Height / 3); // draw bottom border e.Graphics.DrawLine(new Pen(borderBrush, 2.0F), e.Bounds.Left, e.Bounds.Bottom - 1, e.Bounds.Right, e.Bounds.Bottom - 1); base.OnDrawColumnHeader(e); } Tag: .net 3.0: transparent windows? Tag: 105955
  - 8
    - Show ToolTip on every Control continuously Hi, Using VB.NET 2.0, Windows Forms. I want the ToolTip to be shown on every TextBox, ComboBox and DataGridView continuously, and show the contence of these controls. Is there a way to add the ToolTip automaticly for all these controls, without having to link it the whole time to them for every new Control I put on my Forms? And regarding the DataGridView: The ToolTip doesn't show the whole value of every Cell, but cuts it off when it's too long. how to get around this? Thansk a lot in advance, Pieter Tag: .net 3.0: transparent windows? Tag: 105954
  - 9
    - MenuStrip I want to close MenuStrip. How to do that? I send ALT with SendKeys.Send("%") and MenuStrip is closed. It's OK but sendkeys isn't ok for me in all cases. What another way to close MenuStrip? Which method invokes SendKeys.Send("%") in MenuStrip class? Whitch method is executed before MenuStrip.Deactivate event? charlie Tag: .net 3.0: transparent windows? Tag: 105953
  - 10
    - TypeConverter derivations failing to convert to InstanceDescriptor Setup: I have a C# 2.0 Conrol Library project and a Windows Form project in a solution. I am developing winform controls in teh library and the winform project has just a single form for testing these controls. The library project is referenced by the winform proect using a project reference rather than a static dll. Some of my controls require custom TypeConverters, basically so I can sort the properties and handle string to control conversions, etc... I actually derive from ExpandableObjectConverter to take advantage of some of the extra features of that type,specifically relating to PropertyGrid usage. Problem: If I drop one of my controls on the test form, everything works just fine. However, if I make any changes whatsoever to the control, even if it is to add a comment, and recompile, the control is no longer able to serialize properties of the type that is using my custom converter. I get errors such as the following: "Code generation for property 'TabStyle' failed. Error was:''SuperTabStyleConverter' is unable to convert 'INTZControls.SuperTabStyle' to 'System.ComponentModel.Design.Serialization.InstanceDescriptor'.'" I also occasionally get the following error: "Unable to cast object of type 'INTZControls.Tabstrip3D' to type 'INTZControls.TabStrip3D'." I assume the second one is due to the fact that the controls are no longer binary compatible, but this is just a guess. The first one just blows my mind. If I do a full recompile, shut and restart VS2005, everything works again. The other concern I have is that this code runs without any problems within VS2003, even after making significant changes to the control source. Here is an example of one of my type converters: public class TextStyleConverter : ExpandableObjectConverter { public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if ((destinationType == typeof(InstanceDescriptor)) || (destinationType == typeof(string))) { return true; } return base.CanConvertTo(context, destinationType); } public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) { if (destinationType == typeof(InstanceDescriptor)) { ConstructorInfo ci = typeof(TextStyle).GetConstructor(new Type[] { }); if (ci != null) { return new InstanceDescriptor(ci, null, false); } } else if (destinationType == typeof(string)) { return value.ToString(); } return base.ConvertTo(context, culture, value, destinationType); } public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value) { if (value is string) { return TextStyle.Parse(value.ToString()); } return base.ConvertFrom(context, culture, value); } public override bool GetPropertiesSupported(ITypeDescriptorContext context) { return true; } public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return true; } } Here is the definition of the class that uses this converter: [TypeConverter(typeof(TextStyleConverter))] public class TextStyle { /// } Here is the property in the control that uses this class: [Category("Appearance"), Browsable(true), Description("The text style used to display the items in the control"), DefaultValue(typeof(TextStyle), "Microsoft Sans Serif, 8.25pt;ControlText;MiddleCenter;Normal"), DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public TextStyle DefaultTextStyle { get { return m_DefaultTextStyle; } protected set { m_DefaultTextStyle = value; this.Refresh(); } } Ideas? Tag: .net 3.0: transparent windows? Tag: 105949
  - 11
    - Windows forms with html content Hello, Could somebody tell me how or where can I find information about how to build windows applications but with html content, how to handle button clicks etc... Example apps are like Windows Vista Upgrade Advisor and Norton Antivirus 2006. Thanks! Tag: .net 3.0: transparent windows? Tag: 105945
  - 12
    - Controling form loads and redrawing Couple of questions: Is there a way to prevent events form frying until a form initializes (during component initialization) loads? Is there a way form keeping a form from redrawing its self until al the updates and events are completed? It seams to me there was a way to do this in VB6. I am using VB.Net 2005 Thank you, -- Mike Reed Tag: .net 3.0: transparent windows? Tag: 105941
  - 13
    - Running a .NET 2.0 App from a network location We have an application that we need to run from the network, however, it uses many assemblies from the directory it is run from. I have already gone down the road of creating a CodeGroup and PermissionSet from the .NET2.0 Configuration tool and the program continues to crash when executed. Is there some way that we can run this app and allow access to all of the assemblies in the remote directory? This will help us in setting up the InstallScript as well for final deployment. Thanks. -Devin Tag: .net 3.0: transparent windows? Tag: 105940
  - 14
    - Dynamic MDI problems Hi, I'm creating a game dev kit where I need to switch between MDI and SDI mode. MDI is used when displaying the IDE with editors etc, in SDI mode only the "game" window is displayed, optionally with a few editors remaining open. However, setting MdiParent once the child windows has been Shown() causes strange refresh and focusing problems, e.g. a child window will not receive focus when clicking on anything else than the title bar or resize borders. It's very easy to recreate the problem; I can post the code if necessary. I don't want to Close() the forms and re-open them, because there's a lot of complex data in them that I don't want to have to serialize for loading at re-load time. Can I do anything about this? Tag: .net 3.0: transparent windows? Tag: 105938
  - 15
    - How to change the size of the ErrorProvider hint Hi. Is it possible to change the size of the ErrorProvider tool tip? Some of my text messages are to long. thanks and best regards, Jan Tag: .net 3.0: transparent windows? Tag: 105937
  - 16
    - Visual Inheritance: Can I add custom properties to properties window? Hi, I created base UserControl for visual inheritance. The base control includes the following property: [Category("Appearance")] [Description("The button text")] [DefaultValue("Hi")] public string ButtonText { get {return this.button1.Text;} set { this.button1.Text = value; } } But the property "ButtonText" does not appears in property window. How can I add property window support to my Visual Inheritance procatice? Thank you, Max Tag: .net 3.0: transparent windows? Tag: 105934
  - 17
    - Deployment/Debugging Question Let me preface this by saying I've been primarily an ASP.Net developer over the last few years and have just started working with Winforms. My application will be a standalone program that will access FoxPro database files. A typical installation would install my exe in C:\Program Files\My Company\My Application. I want my database files to go in C:\Program Files\My Company\My Application\Data. I've added the Data folder to my project and selected the build action as content for each Foxpro item inside it. My question is with determining the path to the database files for my connection string. I'll be able to determine the Data folder path using Application.StartupPath. However, when debugging, the exe is compiled and executed from the bin folder. Thus, the database path is incorrect when using Application.StartupPath. How can I simulate the install structure when developing and debugging? Tag: .net 3.0: transparent windows? Tag: 105933
  - 18
    - Getting list of Website from IIS "Web Sites" Folder hi guys, few days back i've posted a question regarding how can i get the list of the websites form the IIS, at this location: http://groups.google.com/group/microsoft.public.dotnet.languages.csharp/browse_thread/thread/97f4f07b8b46a397/41372cde30df29e7?lnk=st&q=how+to+get+list+of+websites+from+IIS+C%23&rnum=1&hl=en#41372cde30df29e7 and i got a nice replay. it worked. now the problem is different when i tried the code on the different webserver which has lots of websites but not under the "Default Web Site" directory. most of the Websites are under the "Web Sites" folder. and now i want to retrive all those websites list from the IIS. i tried to get the type of the folder "Web Sites", but i didnt get anything out of it. can anyone tell me how can i get all of the websites from the folder called "Web Sites". Tools: IIS 5.1 on Microsoft Windows Server 2003 C#.net 2005 thanks, Lucky Tag: .net 3.0: transparent windows? Tag: 105924
  - 19
    - replicating tooltip functionality I wish to create a tooltip style control to show information about items being dragged in a tree view. My problem is that I cannot capture the mouse in the treeview ( and hence have the tooltip follow the mouse when it moves outside the treeview control ), presumably because once the tooltip is shown it becomes the foreground window. Any possible solutions would be welcome ( I have thought about wrapping the Win32 tracking tooltip, but I require more sophisticated tooltip content than just text ). Thanks, Andrew. Tag: .net 3.0: transparent windows? Tag: 105923
  - 20
    - Create a base maintenance form: design and implementation recomendations 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. Tag: .net 3.0: transparent windows? Tag: 105922
  - 21
    - 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: .net 3.0: transparent windows? Tag: 105920
  - 22
    - 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: .net 3.0: transparent windows? Tag: 105917
  - 23
    - 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: .net 3.0: transparent windows? Tag: 105916
  - 24
    - 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: .net 3.0: transparent windows? Tag: 105907
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    - 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: .net 3.0: transparent windows? Tag: 105905
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    - 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: .net 3.0: transparent windows? Tag: 105901
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    - 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: .net 3.0: transparent windows? Tag: 105896
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    - 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: .net 3.0: transparent windows? Tag: 105895
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    - 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: .net 3.0: transparent windows? Tag: 105894
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    - 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: .net 3.0: transparent windows? Tag: 105892
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    - 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: .net 3.0: transparent windows? Tag: 105886
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    - 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: .net 3.0: transparent windows? Tag: 105884
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    - 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: .net 3.0: transparent windows? Tag: 105877
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    - 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: .net 3.0: transparent windows? Tag: 105876
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    - 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: .net 3.0: transparent windows? Tag: 105874
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    - 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: .net 3.0: transparent windows? Tag: 105873
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    - 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: .net 3.0: transparent windows? Tag: 105871
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    - 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: .net 3.0: transparent windows? Tag: 105870
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    - 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: .net 3.0: transparent windows? Tag: 105869
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    - 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: .net 3.0: transparent windows? Tag: 105868
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    - <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: .net 3.0: transparent windows? Tag: 105867
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    - 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: .net 3.0: transparent windows? Tag: 105866
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    - 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: .net 3.0: transparent windows? Tag: 105864
  - 19
    - 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: .net 3.0: transparent windows? Tag: 105862
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    - 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: .net 3.0: transparent windows? Tag: 105861
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    - 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: .net 3.0: transparent windows? Tag: 105858
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    - 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: .net 3.0: transparent windows? Tag: 105855
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    - 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: .net 3.0: transparent windows? Tag: 105854
  - 24
    - 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: .net 3.0: transparent windows? Tag: 105853
  - 25
    - 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: .net 3.0: transparent windows? Tag: 105852

Hi,
For those who have the lucky opportunity to test vista rc2, the sidebar's
Add Gadget window has a nice transparency in aero. I was wondering if anyone
knew the code to reproduce a similar transparent window?

Thanks all,

Timothy.

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