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See how Windows Forms applications can be adapted to use the new .NET Add-in framework (System.AddIn) this month.
Mueez Siddiqui
MSDN Magazine July 2008
Context:
Microsoft Visual Studio 2005 Version 8.0.50727.42
Microsoft .NET Framework Version 2.0.50727
Word 2003 Interop
Problem:
I am trying to recreate the "AmbiguousMember" example from p. 31 of Whitechapel's "MS .NET Development for MS Office" using VB instead of VC#.
This involves implementing an event handler for the Word Quit event. In the event handler, I need to toggle the Enabled state of two buttons. This causes the following error:
A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
The code behind the Form1 form is shown below. Form1 has two buttons: Button1 "Run Word"; Button2 "Quit Word". The event handler is intended to clean up if the user quits the Word application, and reset the buttons.
A net s
Greetings,
I've been trying to find a solution online for the last couple days and I'm surprised at how little there is on this topic -- namely, I'm trying to prevent the default behavior of ListBoxes scrolling to the top whenever they regain focus.
I've created a toolbar-like control that is docked on the left-hand side of my screen. This vertical toolbar is comprised of several ListBoxes, and each ListBox is collapsible (much like the Visual Studio designer toolbar). The problem is, if I click on an item on a ListBox that is partially off the top of the screen, the entire toolbar scrolls so that the first item in that particular ListBox is at the top, so your mouse is no longer over the item you originally wished to select.
I'm trying to figure out a way to prevent this behavior. Any suggestions?
RBL
Hi All,
I am using a browser control in my WPF application. The users of this application will be using this control for viewing content that could contain malicious scripts. I want to set the Trust Level so that none of the scripts should be executed. I have added the Attribute to the method that creates the Browser control. I dont think its working though. Any thoughts on how this can be done?
[
PermissionSet(SecurityAction.Assert, Name = "Nothing")]
public System.Windows.Forms.WebBrowser CreateBrowserControl(
PermissionSet ( SecurityAction .Assert, Name = "Nothing" )]
public System.Windows.Forms. Setting trust level for windows.system.forms.browser control Hi All, I am using a browser control in my WPF application. The users of this application will be using this control for viewing content that could contain malicious scripts. I want to set the Trust Level so that none of the scripts should be executed. I have added the Attribute to the method that creates the Browser control. I dont think its working though. Any thoughts on how this can be done? [ PermissionSet ( SecurityAction .Assert, Name = "Nothing" )] public System.Windows.Forms. Is Dispatcher.BeginInvoke really NOT thread safe, while the old System.Windows.Forms.Control.BeginIn Hello. System.Windows.Forms.Control.BeginInvoke is documented as thread safe (in fact, BeginInvoke , EndInvoke , Invoke , InvokeRequired , and CreateGraphics are). Great! But in WPF, Dispatcher.BeginInvoke is not documented as thread safe. Which would appear to me as a regression (and not really convenient, to be honest). Was it only forgotten in MSDN documentation, or should I really use external locking to prevent the dispatcher to get lost in its messages and priorities? Thanks. ;) System.Windows.Forms.WebBrowser unable to update or change I am using this WebBrowser component in a C# project. I have declared and use "_wb" as shown below:: string httpcmd = @"https://..........."; System.Windows.Forms.WebBrowser _wb = new System.Windows.Forms.WebBrowser(); _wb.ScriptErrorsSuppressed = false; Uri myuri = new Uri(httpcmd); _wb.Url = myuri; while (_wb.ReadyState != System.Windows.Forms.WebBrowserReadyState.Complete) { System.Windows.Forms.Application.DoEvents(); } The above code in within a class. Once my program uses the above code once, it then does seem possible to change. i.e. After the first iteration, nothing changes each time the code is run. The DocumentText property I reference stays the same once it is set. It is like the URI is not even re-sent. Only if I close the application and then re-run then the webbroweser will update as desired. I have seen many references to this problem but have not been able to resolved it. Can anyone suggest how to get this componet to reset or clear so it behaves like I have re-run the application? 'System.AccessViolationException' occurred in System.Windows.Forms.dll immediately before entering <p>Win7 64 bit; fully patched VS2008 targeting FW2.0; VB.Net; running in Debug Mode (not tested in Release mode)</p> <p>I have a resonably complex app which I am refactoring a bit. As part of that, I relocated some code from a subroutine into a Click Event Handler. The Event Handler will, late in the handler, call the, reduced in function, subroutine. The point of this is that all changes to the code occur in the Event Handler and the routine it calls. Simple right?</p> <p>Now when I click the button associated with the modified Handler I get:</p> <p>A first chance exception of type 'System.AccessViolationException' occurred in System.Windows.Forms.dll<br />With Error System.AccessViolationException Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</p> <p>at MusicManager2009.frmMain2.cmdLoadAlbum_Click(Object sender, EventArgs e)</p> <p>at System.Windows.Forms.Control.OnClick(EventArgs e)</p> <p>at System.Windows.Forms.Button.OnClick(EventArgs e)</p> <p>at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)</p> <p>at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)</p> <p>at System.Windows.For Uri does not work when assigned to System.Windows.Forms.WebBrowser Hi I have this uri http://maps.google.com/maps/api/staticmap?size=622x276&maptype=roadmap%5C&markers=color:red%7Clabel:A%7C%41%52%4C%C3%98%56,SE&sensor=false probing a city in sweden called Arlöv (%7C%41%52%4C%C3%98%56) The uri works perfectly when pasted into IE. It works when i go through the HTTPRequest But It does not work when assigned to the System.Windows.Forms.WebBrowser, like so: Dim url As String = "http://maps.goog Convert System.Window.Forms.Keys into WPF (system.windows.input.key) Hi, I am trying to add some short cuts to my WPF app. I read an xml file which especifies the shortcut key with it is system.windows..forms.keys value (e.g: 114, that will be F4) The idea of having to create a switch to return the right key based on it is value it is, to say the least, horrendous, so before I start doing that :( ... does anyone knows how I can convert that value into a system.windows.input.key? Any help will be appreciated. Thanks error CS0570: 'System.Windows.Forms.MessageBoxButtons.OK' is not supported by the language Hi all, I have a following code in C#: using System; using zedGraph ambiguous with System.Windows.Forms.Label Hi, Based on my program is visualization application. Hence I need to produce a graph after execute the program. But i face a problem which is when i add ZedGraph in my reference, the label in the program occurred as an error. ('Label' is an ambiguous reference between 'System.Windows.Forms.Label' and 'ZedGraph.Label' C:...\Form1.cs) So, is it got any solution to solve this problem? I tried to solve it by remove the System.Windows.Forms in the references and adding it in every PictureBox, List and etc. But this is a problem for when i set the property for the label. Your help is greatly important to me. Thank you for your time. Regards, Sarah Kee Application Architecture in Windows Forms 2.0 Applications have special support in Windows Forms. For starters, you can manage and tailor your application's lifetime, and, when the work flow is disrupted by an unhandled exception, you can choose from several methods of response. Then, there are several application models that you can employ, including Single Document Interface (SDI) and Multiple Document Interface (MDI) applications, each of which can support either multiple-instance or single-instance mode, the former the VS05 default and the latter requiring special consideration. All applications, however, can discover and use a wide variety of information about the system and environment they execute in.
public System.Windows.Forms. Is Dispatcher.BeginInvoke really NOT thread safe, while the old System.Windows.Forms.Control.BeginIn Hello. System.Windows.Forms.Control.BeginInvoke is documented as thread safe (in fact, BeginInvoke , EndInvoke , Invoke , InvokeRequired , and CreateGraphics are). Great! But in WPF, Dispatcher.BeginInvoke is not documented as thread safe. Which would appear to me as a regression (and not really convenient, to be honest). Was it only forgotten in MSDN documentation, or should I really use external locking to prevent the dispatcher to get lost in its messages and priorities? Thanks. ;)
Hello.
System.Windows.Forms.Control.BeginInvoke is documented as thread safe (in fact, BeginInvoke , EndInvoke , Invoke , InvokeRequired , and CreateGraphics are).
Great!
But in WPF, Dispatcher.BeginInvoke is not documented as thread safe. Which would appear to me as a regression (and not really convenient, to be honest).
Was it only forgotten in MSDN documentation, or should I really use external locking to prevent the dispatcher to get lost in its messages and priorities?
Thanks. ;)
I am using this WebBrowser component in a C# project.
I have declared and use "_wb" as shown below::
string httpcmd = @"https://...........";
System.Windows.Forms.WebBrowser _wb = new System.Windows.Forms.WebBrowser(); _wb.ScriptErrorsSuppressed = false; Uri myuri = new Uri(httpcmd); _wb.Url = myuri; while (_wb.ReadyState != System.Windows.Forms.WebBrowserReadyState.Complete) { System.Windows.Forms.Application.DoEvents(); }
The above code in within a class.
Once my program uses the above code once, it then does seem possible to change.
i.e. After the first iteration, nothing changes each time the code is run.
The DocumentText property I reference stays the same once it is set.
It is like the URI is not even re-sent.
Only if I close the application and then re-run then the webbroweser will update as desired.
I have seen many references to this problem but have not been able to resolved it.
Can anyone suggest how to get this componet to reset or clear so it behaves like I have re-run the application?
<p>Win7 64 bit; fully patched VS2008 targeting FW2.0; VB.Net; running in Debug Mode (not tested in Release mode)</p> <p>I have a resonably complex app which I am refactoring a bit. As part of that, I relocated some code from a subroutine into a Click Event Handler. The Event Handler will, late in the handler, call the, reduced in function, subroutine. The point of this is that all changes to the code occur in the Event Handler and the routine it calls. Simple right?</p> <p>Now when I click the button associated with the modified Handler I get:</p>
<p>A first chance exception of type 'System.AccessViolationException' occurred in System.Windows.Forms.dll<br />With Error System.AccessViolationException Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</p> <p>at MusicManager2009.frmMain2.cmdLoadAlbum_Click(Object sender, EventArgs e)</p> <p>at System.Windows.Forms.Control.OnClick(EventArgs e)</p> <p>at System.Windows.Forms.Button.OnClick(EventArgs e)</p> <p>at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)</p> <p>at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)</p> <p>at System.Windows.For
Hi
I have this uri http://maps.google.com/maps/api/staticmap?size=622x276&maptype=roadmap%5C&markers=color:red%7Clabel:A%7C%41%52%4C%C3%98%56,SE&sensor=false
probing a city in sweden called Arlöv (%7C%41%52%4C%C3%98%56)
The uri works perfectly when pasted into IE.
It works when i go through the HTTPRequest
But It does not work when assigned to the System.Windows.Forms.WebBrowser, like so:
Dim url As String = "http://maps.goog
Hi,
I am trying to add some short cuts to my WPF app. I read an xml file which especifies the shortcut key with it is system.windows..forms.keys value (e.g: 114, that will be F4)
The idea of having to create a switch to return the right key based on it is value it is, to say the least, horrendous, so before I start doing that :( ... does anyone knows how I can convert that value into a system.windows.input.key? Any help will be appreciated.
Thanks
Hi all,
I have a following code in C#:
using
System;
zedGraph ambiguous with System.Windows.Forms.Label Hi, Based on my program is visualization application. Hence I need to produce a graph after execute the program. But i face a problem which is when i add ZedGraph in my reference, the label in the program occurred as an error. ('Label' is an ambiguous reference between 'System.Windows.Forms.Label' and 'ZedGraph.Label' C:...\Form1.cs) So, is it got any solution to solve this problem? I tried to solve it by remove the System.Windows.Forms in the references and adding it in every PictureBox, List and etc. But this is a problem for when i set the property for the label. Your help is greatly important to me. Thank you for your time. Regards, Sarah Kee
Based on my program is visualization application. Hence I need to produce a graph after execute the program.
But i face a problem which is when i add ZedGraph in my reference, the label in the program occurred as an error. ('Label' is an ambiguous reference between 'System.Windows.Forms.Label' and 'ZedGraph.Label' C:...\Form1.cs)
So, is it got any solution to solve this problem?
I tried to solve it by remove the System.Windows.Forms in the references and adding it in every PictureBox, List and etc. But this is a problem for when i set the property for the label.
Your help is greatly important to me.
Thank you for your time.
Regards,
Sarah Kee
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