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Hello everyone, Ive been trying to get my program to function for quite some time now and havent been able to get any clear answers. its a simple practice app basically, when I click a button on my form, I want the app to press a button in another form. that simple. seemed like it at least, but when I try to use this it doesnt work.
int a = Win32.FindWindow(txtClassName2.Text, Title.Text);
int b = Win32.SendMessage(a, Win32.BM_CLICK, 0, 0);
when I replace Win32 with Win32API, then theres a problem with SendMessage not being part of the current selection, also there is a problem with FindWindow with Win32API. FindWindowEx doesnt work either. When I use Win32, they work work but BM_CLICK doesnt work. its like I have to choose which problem to go with, I havent been able to figure this out. this is actually the whole code in the form.cs file:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace test
{
public partial class Form1 : Form
{
[DllImport("user32", EntryPoint = "GetNextWindow")]
public static extern int
GetWindow(IntPtr hwnd, int wFlag);
public Form1()
{
InitializeComponent();
}
public class Win32
{
public const int WM_SYSCOMMAND = 0x0112;
public const int SC_CLOSE = 0xF060;
public const int BM_CLICK = 0xF5;
[DllImport("user32.dll")]
public static extern int FindWindow(string lpClass, string lpWindow);
[DllImport("user32.dll")]
public static extern int SendMessage(int hWnd, uint Msg, int wParam, int lParam);
}
private void button1_Click(object sender, EventArgs e)
{
int hWnd;
//Thread.Sleep(5000);
if ((txtWindowCaption.Text == "") && (txtClassName.Text == ""))
{
hWnd = Win32API.FindWindowAny(0, 0);
}
else if ((txtWindowCaption.Text == "") && (txtClassName.Text != ""))
{
hWnd = Win32API.FindWindowNullWindowCaption(txtClassName.Text, 0);
}
else if ((txtWindowCaption.Text != "") && (txtClassName.Text == ""))
{
hWnd = Win32API.FindWindowNullClassName(0, txtWindowCaption.Text);
}
else
{
hWnd = Win32API.FindWindow(txtClassName.Text, txtWindowCaption.Text);
}
if (hWnd == 0)
{
MessageBox.Show("Specified window is not running.", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
// Set the window foreground.
Win32API.SetForegroundWindow(hWnd);
// if window is minimized, simply restore, otherwise show it. Notice the
// declaration of Win32API.IsIconic defines the return value bool
// allowing .NET to marshall the integer value to a bool.
if (Win32API.IsIconic(hWnd))
{
Win32API.ShowWindow(hWnd, Win32API.SW_RESTORE);
}
else
{
Win32API.ShowWindow(hWnd, Win32API.SW_SHOW);
}
int a = Win32.FindWindow(txtClassName2.Text, Title.Text);
int b = Win32.SendMessage(a, Win32.BM_CLICK, 0, 0);
}
}
}
}
anyone got any advice? thanks
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anyone got at least a code sample of a program like this is a sample app? I couldnt find one on code project...
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Trying to combine dbRecords that overlap to display as one unit on treeView.
so rather than looking like:
+ dept1<br />
+ dept2<br />
+ dept2<br />
+ dept2<br />
+ dept3<br />
+ dept3<br />
+ dept4
I want it to look like:
+ dept1<br />
+ dept2<br />
+ dept3<br />
+ dept4
Using TreeNodeCollection.Contains Method to acheive this goal, but its not working. It seems that becuase i'm recreating the TreeNode object [TreeNode myNode = new TreeNode()] on each new loop it doesn't have anyway to refrenece the data i've already written. This makes sense, but it seems odd that i can't refrence the pre-written data inside of the tree.
I've tried refrenceing the actual TreeView, (tView.Nodes.Contains(myNode)
I've tried the locally written TreeNode (DeptNode.Nodes.Contains(myNode)
I've tried doing a foreach loop[foreach(TreeNode node in tView.Nodes)] and checking doing if(node.Tag == myNode.Tag)
I've tried removing the recreation of the TreeNode so it refrences the same node object when doing the search
(i only ended up with the expected result of only adding the newest node to the TreeView rather than several new nodes)
and pretty much i'm at wits end on what would work...
Here's the code:
private void TelList()
{
statusBarPanel1.Text = "Please Wait While We Update the List";
PhoneTree.Nodes.Clear();
TreeNode ParentNode = new TreeNode("Phone List");
TreeNode Purge = new TreeNode("Purge");
PhoneTree.Nodes.Add(ParentNode);
PhoneTree.Nodes.Add(Purge);
while (TreeRead.Read())
{
TreeNode DeptNode = new TreeNode();
TreeNode TelNode = new TreeNode();
TreeNode ModNode = new TreeNode();
DeptNode.Text = TreeRead.GetString(7);
DeptNode.Tag = TreeRead.GetValue(4);
ModNode.Text = TreeRead.GetString(2);
ModNode.Tag = TreeRead.GetValue(4);
TelNode.Text = TreeRead.GetString(3);
TelNode.Tag = TreeRead.GetValue(2);
if (ParentNode.Nodes.Contains(DeptNode))
{
if (ModNode.Tag == DeptNode.Tag)
{
if (DeptNode.Nodes.Contains(ModNode))
{
if (ModNode.Nodes.Contains(TelNode))
{continue;}
else
{
ModNode.Nodes.Add(TelNode);
}
}
else
{
DeptNode.Nodes.Add(ModNode);
}
}
if (TelNode.Tag.ToString() == ModNode.Text)
{
ModNode.Nodes.Add(TelNode);
}
}
else
{
ParentNode.Nodes.Add(DeptNode);
if (ModNode.Tag == DeptNode.Tag)
{
if (DeptNode.Nodes.Contains(ModNode))
{
ModNode.Nodes.Add(TelNode);
}
else
{
DeptNode.Nodes.Add(ModNode);
}
}
if (TelNode.Tag.ToString() == ModNode.Text)
{
ModNode.Nodes.Add(TelNode);
}
}
}
TreeRead.Close();
TreeConn.Close();
}
    
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I am using .Net Framework 2.0 winforms groupbox control. I would want to know on how to change the border color of the groupbox . Any ideas on how this would be achieved would be appreciated.
Thanks,
VPMahank
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Not easily done.
You can only achieve this by extending the groupbox class, and painting it yourself.
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The problem:
I want to allow an administrator (user) to create a list of teachers, each teacher in turn has a list of classes, each class has a list of students.
There's an article at http://aspalliance.com/721 that describes making classes for the Student and the StudentList, but I'm wondering how to make classes that are collections of the other classes, ie a ClassList that holds the StudentList class and a TeacherList class that holds the ClassList class.
TeacherList-->ClassList-->StudentList-->Student
What is the approach to use to make a custom object that could handle this nesting?
The article mentioned above has a StudentList Class that inherits from IEnumerable and uses a Hastable to hold the Student objects that are made up of simple data types. I tried making classes in a similar fashion for the ClassList and StudentList collections, but I'm having casting errors, so I'm not sure that this is the correct approach or my implementation is not correct.
Anyone have any ideas or suggestions as to how to nest collections like this? or another approach to accomplish the same thing? If you want to see the code I've tried, I can post it.
Thanks,
Paul
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The design using a HashTable to hold the objects is sound.
I would make a TeacherList object that is a list of Teacher objects. The Teacher object would contain a ClassList object that is a list of SchoolClass objects (as Class is obviously not a good name). The SchoolClass object contains a StudentList object, which is a list of Student objects.
---
b { font-weight: normal; }
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Guffa:
I just got a reply elsewhere that pointed out the same error that you did, ie, that I don't have a teacher or a class object and that I cannot use the list objects in their place.
> A TeacherList would not hold a ClassList.
>
> A TeacherList has 0-n Teacher objects.
> A Teacher has 1 ClassList
> A ClassList has 0-n Class objects.
> A Class has 1 StudentList
> A StudentList has 1-n Student objects.
I'm working on the solution now. Hopefully, I'll construct it correctly.
Thank you,
Paul
-- modified at 15:49 Tuesday 7th February, 2006
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Well, you could make the TeacherList contain ClassList objects, but then it would hardly be a teacher list, it would just be a ClassList list. A teacher object would probably contain some more information than just the class lists, like the name of the teacher, to start with.
---
b { font-weight: normal; }
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Hi,
I have project when I want to keep all commonly used variables and structures and refer in project. (Like we do using include files in C r C++)
Could any one tell how to do this.
Thanks and Regards,
Subbu
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Add a class file to the project. In the class you put static members.
Also make the class sealed, and make a private constructor in the class. That way it's obvious that one is not supposed to inherit or create objects from the class.
---
b { font-weight: normal; }
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Hi,
Thanks for ur information.
Suppose I want structure(struct) data type which is used accross all the files in the project ...what should I do?
Thanks and Regards,
Subbu
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Put it in the namespace in the class file.
---
b { font-weight: normal; }
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Hi all,
i have a program which is using AxWebBrowser. It was working well under .net framework 1.1. But after upgrading .net framework 2.0, at SOME systems, i receive the error below:
System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.
at SHDocVw.IWebBrowser2.Navigate(String URL, Object& Flags, Object& TargetFrameName, Object& PostData, Object& Headers)
at AxSHDocVw.AxWebBrowser.Navigate(String uRL, Object& flags, Object& targetFrameName, Object& postData, Object& headers)
does anyone know why it occurs, and how can i fix that problem?
thanks.
ozgur.nevres
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On these "SOME" systems, do they have IE 6.0 SP1 or greater installed? Under .NET 1.0 and 1.1, only IE 5.0 was required. This changed to IE 6.0 SP1 under .NET 2.0.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Thank you, i'll ask it to our clients. But one of our client who is getting this error, has aldready installed ie7.0 Beta. Does it cause the same problem?
ozgur.nevres
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You'll have to test it.
But that's when you tell the customer that since IE7 is a Beta product, you won't support that configuration. After all, how can you support your application when a component that it needs is not stable.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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"But that's when you tell the customer that since IE7 is a Beta product, you won't support that configuration."
it is not easy as you say 
But now i am using .net2.0's WebBrowser component and it is working without a problem.
Thanks for your care
ozgur.nevres
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Mertli Ozgur Nevres wrote: it is not easy as you say
Sure it is! You tell them that your code will be tested and supported when IE7 is released. You can't be held responsible for any performance or stability issues because they're using unstable and unsupported software from another manufacturer that your code depends on.
If your customer insists on using it with IE7, they're on their own. You tell them what the terms of support are. They don't get to dictate that to you because, after all, they're not writing the code, you are.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have a Windows Forms app in which I execute a SQL statement using SQLDataAdapter. I want the user to be able to kill the SQL statement if it seems to take to long. My thought is to execute the SQL in its own thread. Then when the user clicks a Cancel button it just stops the Thread.
Is this the best way to do this? Will it work? Is is inefficient?
Thanks,
Mark Mokris
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Use the SqlDataAdapter in a thread, as you suggested, but I would add a twist. Instead of calling Thread.Abort() to terminate the thread, have your thread read small chunks of data at a time, and check for a flag telling it to stop between reads. Doing it this way, you could even have a progress bar in your main window showing the progress to the user.
--------
"I say no to drugs, but they don't listen."
- Marilyn Manson
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As someone suggested to me on here yesterday, you might want to look into System.ComponentModel.BackgroundWorker as an alternative. I haven't used it myself, I stuck to threads because it's what I know much more of anyway but it might be worth looking into yourself.
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Can any body help me
I was created one Web Custom Control named WebCustomControl1. I was added the methods called Text, Value, AutoPostBack and compiled. It created as WebCustomControl1.dll.
I opened new web project and copied that WebCustomControl1.dll into the bin folder and added to the ToolBox. Dragged and dropped to the WebForm1.aspx and renamed as wc, and added notmal command button to the page. in the button click event i had written the code like
Response.Write(Request["wc"].ToString());
while executing the line of code it is giving error like Object reference not set to an instance of an object. How can i get the Request of WebCustomControl value from the web page.
Regards
Subbaraju
m.s.raju
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You need to call the constructor of your object. You can't call instance methods or set properties to a null object. So for example:
WebCustomControl1 wcc = new WebCustomControl1();
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