C# Discussion Boards - CodeProject

vaishali1014-Sep-06 20:44

14-Sep-06 20:44

Hi,
I am working on a window based project.....
I am using VS 1.0 version...
I need to create combobox in a datagrid...
Can u help...
If possible send the code snippet...

Thanks in advance...

Regards,
Vaishali

Re: Create Combobox in Datagrid

Amit Kushwaha14-Sep-06 21:11

Amit Kushwaha

14-Sep-06 21:11

Hi,

Regarding ur prob here is the solution...
============================================

Public Class Form1
Inherits System.Windows.Forms.Form

'Declare objects required to connect to the database
Private mcnSQL As New SqlClient.SqlConnection("SERVER=(local); INTEGRATED SECURITY=SSPI; DATABASE=northwind")
Private mdaEmploye As New SqlClient.SqlDataAdapter("SELECT TitleOfCourtesy, FirstName, LastName, Title FROM Employees", mcnSQL)
Private mds As New DataSet()

'We will also need a combo - After all, this is what we want to do!
Private mctlCombo As New ComboBox()

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Connect the TextChanged event to a procedure
AddHandler mctlCombo.TextChanged, AddressOf Ctrls_TextChanged

'Fill ComboBox list.
With mctlCombo
.Name = "MyCombo"
.Visible = False
.Items.Clear()
.Items.Add("Sales Representative")
.Items.Add("Inside Sales Coordinator")
.Items.Add("Vice President, Sales")
.Items.Add("Sales Manager")
.Items.Add("Flunky")
End With

'Fill the dataset
mdaEmploye.Fill(mds, "Employees")

'Set the RowHeight of the DataGrid to the height of the ComboBox.
DataGrid1.PreferredRowHeight = mctlCombo.Height

'Give the data to the DataGrid
DataGrid1.DataSource = mds
DataGrid1.DataMember = "Employees"

'Add ComboBox to the Control collection of the DataGrid.
DataGrid1.Controls.Add(mctlCombo)
End Sub

Private Sub DataGrid1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles DataGrid1.Paint
'Set the width of the ComboBox to the Width of the cell
If DataGrid1.CurrentCell.ColumnNumber = 3 Then
mctlCombo.Width = DataGrid1.GetCurrentCellBounds.Width
End If
End Sub

Private Sub DataGrid1_CurrentCellChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataGrid1.CurrentCellChanged
'Display (or hide) the ComboBox
If DataGrid1.CurrentCell.ColumnNumber = 3 Then
With mctlCombo
.Visible = False
.Width = 0
.Left = DataGrid1.GetCurrentCellBounds.Left
.Top = DataGrid1.GetCurrentCellBounds.Top
.Text = DataGrid1.Item(DataGrid1.CurrentCell).ToString & ""
.Visible = True
End With
Else
HideComboBox(sender, e)
End If
End Sub

Private Sub HideComboBox(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataGrid1.Scroll, DataGrid1.Click
'Hide the ComboBox when the grid is clicked or scrolled
mctlCombo.Visible = False
mctlCombo.Width = 0
End Sub

Private Sub Ctrls_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
'When the an item is selected, the grid must show this new value
If DataGrid1.CurrentCell.ColumnNumber = 3 Then
mctlCombo.Visible = False
If DataGrid1.Item(DataGrid1.CurrentCell).ToString & "" = "" Then SendKeys.Send("*")
DataGrid1.Item(DataGrid1.CurrentCell) = mctlCombo.Text
End If
End Sub

End Class

Re: Create Combobox in Datagrid

vaishali1014-Sep-06 21:31

vaishali10

14-Sep-06 21:31

Sorry but i am working on C# .NET.....
can u help me in tht??

Thnaks.

Regards,
Vaishali

Re: Create Combobox in Datagrid

Hamid_RT15-Sep-06 6:53

Hamid_RT

15-Sep-06 6:53

See A ComboBox in a DataGrid[^] maybe it is some helpful to you

WhiteSky

C# file upload progress bar

Arindam Tewary14-Sep-06 20:22

Arindam Tewary

14-Sep-06 20:22

Hi
I have to implement a file upload progress bar while uploading the file to the server.
Can anyone please help !!!
Thanks in advance

DotNet Crystal Report

peshawarcoder14-Sep-06 20:01

peshawarcoder

14-Sep-06 20:01

I am using Visual Studio 2005 Professional Edition.
I have added a CrystalReport(.rpt) file to the project. I want to increase the width of this report at design. How can i do that?

Thanks.

How to conver byt buffer to char array

Parshant Verma14-Sep-06 19:46

Parshant Verma

14-Sep-06 19:46

Hi I have a byte array[12].Iwant to convert it char or string and want to store in a char array.
How can i do this in c#.
for e.g

int bResult=fin.Read(m_pbytFileBuffer,0x0,0x50);//read 0x50 byte in buufer from file

for(bytSizeOfFolderName=1;m_pbytFileBuffer[bytSizeOfFolderName]!=0x00;bytSizeOfFolderName++)//calculate size of string
;
char []FolderName = new char[bytSizeOfFolderName+1];//dec char array

???????

Parshant

Re: How to conver byt buffer to char array

stancrm14-Sep-06 20:53

stancrm

14-Sep-06 20:53

byte[] byteArray = new byte[12] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };<br />
string byteArrayInString = Encoding.ASCII.GetString(byteArray);<br />
char[] byteArrayInCharArray = byteArrayInString.ToCharArray();

Re: How to conver byt buffer to char array

wasife15-Sep-06 0:22

wasife

15-Sep-06 0:22

Parshant Verma wrote:
Iwant to convert it char

You can use following:

Array.Copy(<bytearray>,<chararray>, <no. of="" characters="" to="" copy="" from="" byte="" char="" array="">);

Regards,
Wasif Ehsan.

Re: How to conver byt buffer to char array

Hamid_RT15-Sep-06 6:42

Hamid_RT

15-Sep-06 6:42

See here[^] maybe it is some helpful to you

WhiteSky

view state

govind kanidapu14-Sep-06 19:02

govind kanidapu

14-Sep-06 19:02

what is view state in .net technology and importance of view state?

Re: view state

Christian Graus14-Sep-06 19:19

Christian Graus

14-Sep-06 19:19

what is google, and the importance of google to people with broad, straightforward sort of questions ?

http://www.google.com.au/search?hl=en&q=viewstate&meta=[^]

view state is a way of persisting state between cycles of an ASP.NET web page to the server.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Dll Import Problem in loading two c++ assemblies with same name

He is Cool14-Sep-06 18:50

He is Cool

14-Sep-06 18:50

Hi,

I have a C#.net application. I have two C++ dlls with same name (but different version numbers that i see in the dll). When I use Dll Import to invoke methods on each dll separately in two different applications, all the methods in both the c++ dlls work fine.

But if i tend to use dll import and invoke the functions in the two dlls, the first dll's methods are executing fine but when the second dll's methods are invoked, there is an error stating "cannot load the second dll. method not found".

I wonder if it is something to do with loading two same named dlls in the same memory of an exe...

Please help in identifying the cause and kindly clarify my doubt.

Many Thanks.

Re: Dll Import Problem in loading two c++ assemblies with same name

Guffa14-Sep-06 19:15

Guffa

14-Sep-06 19:15

Please don't cross post.

---
b { font-weight: normal; }

Re: Dll Import Problem in loading two c++ assemblies with same name

He is Cool14-Sep-06 19:50

He is Cool

14-Sep-06 19:50

I am dealing with something related to .NET and C# and wonder about your comment. Hope you are clear in understanding my problem.

Win32 Functions InteropServices problems

erikkl200014-Sep-06 17:28

erikkl2000

14-Sep-06 17:28

I am trying to use the Calculator in my win forms and i so i am trying to capture the Edit class from the Calculator ( The edit class is the textbox on the Calculator).

I am not able to figure this out..

I need some direction...

here is what i have so far...

----------------------------------------------
[DllImport("User32.dll")]
public static extern Int32 EnumChildWindows(IntPtr hWndParent, Delegate lpEnumFunc, int lParam);

-----------------------------------------------

public partial class Form1 : Form
{
delegate int CallBack(IntPtr hwnd, int iPram);

public Form1()
{
InitializeComponent();
}
private Process _Process = null;
private void button1_Click(object sender, EventArgs e)
{
this._Process = Process.Start("calc");

CallBack callback = new CallBack(EnumChildGetValue);

Win32Functions.EnumChildWindows(this._Process.Handle, callback, 0);
}

public int EnumChildGetValue(IntPtr hWnd, int lParam)
{
int txtValue;
string editText = "";

StringBuilder className = new StringBuilder(256);

txtValue = Win32Functions.GetClassName(hWnd, className, 256);
editText = className.ToString().Trim();

return 1;
}

}

in the callback i am tring to locate the different class howver this is not working correctly..

erik

looking for tab control like office 2003 shared workspace's style?

jacktom14-Sep-06 17:09

jacktom

14-Sep-06 17:09

does anyone have a tab control derived user control class which display like office 2003 shared workspace's style?
Very thanks!

jacklin

How to develop an ie extension similar as google notebook?

rryyjw14-Sep-06 16:09

rryyjw

14-Sep-06 16:09

Hi all,

After installing google notebook, a button will be added to the right-bottom of ie. Does anybody know how to implement that?
Very appreciate for any reply.

Jie

How to grab a web page using .Net 2.0 WebBrowser Control

rryyjw14-Sep-06 16:06

rryyjw

14-Sep-06 16:06

Hi All,

I want to grab a page using WebBrowser Control (see code below). I try to get the page content through DocumentText property in "DocumentCompleted" event handler, but it seems that the event won't be triggered. The "Navigated" event won't be triggered either. However, the "Navigating" event does.
I used to use HttpWebRequest/HttpWebResponse to grab webpage content, however, the drawback is that I can't get the full loaded page through it. What I mean by this is that maybe some javascript will execute to modify elements on the page after it's loaded, I call this page as full loaded page. I think using WebBrowser Control can overcome this drawback. It's just like a browser, and it'll execute those javascript after loading the page. But I can't make this control work correctly. Could anyone help me? I'm very appreciate.

Thanks
Jie

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

namespace ConsoleApplication1
{
class Program
{
static WebBrowser wb;

[STAThread]
static void Main(string[] args)
{
Go();
}

private static void Go()
{
wb = new WebBrowser();
wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(wb_DocumentCompleted);
wb.Navigating +=new WebBrowserNavigatingEventHandler(wb_Navigating);
wb.Navigated += new WebBrowserNavigatedEventHandler(wb_Navigated);
wb.Navigate("http://www.google.com");
Console.ReadLine();
}

static void wb_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
Console.WriteLine("Navigating");
}

static void wb_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
Console.WriteLine("Navigated");
}

static void wb_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
Console.WriteLine("DocumentCompleted");
Console.WriteLine(wb.DocumentText);
}
}
}

Re: How to grab a web page using .Net 2.0 WebBrowser Control

Nader Elshehabi14-Sep-06 16:32

Nader Elshehabi

14-Sep-06 16:32

Hello

Please don't take any offence when I say it's a very bad piece of code you got there!! Really! You got to declare your Webbrowser as a member of your forms class. And why the console if you got a browser on a form?!! Not to mention the main method!! You don't want to display it make visible = false; but I don't think it will ever load anything this way?!! The WebBrowser object dies the moment this Go method finishes, that's why it doesn't load anything.

To make the webbrowser really works:
1- Make a form and put it on it -even if invisible- using the toolbox
2- Handle the DocumentCompleted event, it does fire.
3- If you don't want to handle it, you can handle ProcessChanged event

There is a workaround to make Webbrowser work on console but I don't recommend it!!

Regards

Re: How to grab a web page using .Net 2.0 WebBrowser Control

scott_hackett18-Sep-06 20:47

scott_hackett

18-Sep-06 20:47

You don't need the web browser to do that. Just do the following:

public string GetWebPage(string url)
{
    HttpWebRequest webRequest = null;
    HttpWebResponse webResponse = null;
    Stream responseStream = null;
    Encoding encode = null;
    StreamReader webPageStream = null;
    string webPageText = "";

    try
    {
        // Create the web request
        webRequest = (HttpWebRequest)HttpWebRequest.Create(url);
        // Get the response
        webResponse = (HttpWebResponse)webRequest.GetResponse();
        // Get the response stream
        responseStream = webResponse.GetResponseStream();
        // Get the encoding
        encode = Encoding.GetEncoding("utf-8");
        // Read the response and using a StreamReader
        webPageStream = new StreamReader(responseStream, encode);
        webPageText = webPageStream.ReadToEnd();
    }
    catch (Exception e)
    {
        MessageBox.Show("Error : " + e.Message);
    }
    finally
    {
        // free any resources
        if (webPageStream != null)
        {
            webPageStream.Close();
            webPageStream.Dispose();
        }
        if (responseStream != null)
        {
            responseStream.Close();
            responseStream.Dispose();
        }
        if (webResponse != null)
        {
            webResponse.Close();
        }
    }

    // return the page contents
    return webPageText;
}

Another managed/unmanaged problem

Kasic Slobodan14-Sep-06 15:32

Kasic Slobodan

14-Sep-06 15:32

We managed to workaround previous problem (http://www.codeproject.com/script/comments/forums.asp?msg=1665538&forumid=1649&mode=all&userid=1533852#xx1665538xx) with Nader help, but now, another problem.

Now it's a problem to pass the address of structure array.

My colleague and I developing a program. He is dealing with unmanaged code and Iam dealing with managed code.

So we tried this:

public static extern uint bbox_table_get(uint parent_id, uint struct_size, ref Array data, ref StringBuilder data_name);

Array data = Array.CreateInstance(typeof(bb.DATA), count);

bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), ref data, ref data_name);

and this:

public static extern uint bbox_table_get(uint parent_id, uint struct_size, ref DATA []data, ref StringBuilder data_name);
 

DATA []data = new DATA[count];

bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), ref data, ref data_name);

and don't work.

We can compile in both cases, but program breaks before he get to dll.

In C++ it should be like:

UINT bb_table_get(UINT parent_id, UINT struct_size, DATA *data, wchar_t *data_name);

 
DATA *data = new DATA[count];

bbox_table_get(id, sizeof(DATA), data, data_name);

And DATA struct looks like:
<pre
public struct="" data

{

="" public="" uint="" data_id;

="" data_type;

public="" data_size;

};<="" pre="">

Thanks.

-- modified at 21:25 Thursday 14th September, 2006

Re: Another managed/unmanaged problem

Nader Elshehabi14-Sep-06 15:58

Nader Elshehabi

14-Sep-06 15:58

Hello

First, arrays in C# are actualy references. So try to keep it simple first:

public static extern uint bbox_table_get(uint parent_id, uint struct_size, bb.DATA[], ref StringBuilder data_name);
bb.DATA[] data = new bb.DATA[count];
bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), data, ref data_name);

...see if that works! If it doesn't, what is exactly the error message?

Regards

Re: Another managed/unmanaged problem

Kasic Slobodan15-Sep-06 1:59

Kasic Slobodan

15-Sep-06 1:59

This is it...
It works.

Thank you.

Re: Another managed/unmanaged problem

Kasic Slobodan15-Sep-06 7:53

Kasic Slobodan

15-Sep-06 7:53

I have another problem. Sorry for this problem frequency.

public static extern uint bbox_table_get(uint parent_id, uint struct_size, DATA []data, char []data_name);

DATA []data = new DATA[count];

bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), data, data_name);

We can compile it with this, program call a dll function, data addresses are all OK and dll fills all data, but, for some reason, at the ending of the function, data arent sent to the application.

Data are sent as constants, accually read-only.
how can I avoid this?

Thanks...

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