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there are a few ways to do it.
the most straightforward, oo way of doing it would be to subclass the DataGridColumnStyle object and override the paint event to draw the button(s) according to your requirements.
i.e. does every column have a button all of the time, or only the row that is currently selected.
i don't have any code samples for this, but if you google for "button in datagrid" you should definitely come up with some.
hope this helps.
-jim
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I have been searching of this for a week, but I don't have any luck get some code of it..most of them are for asp.net, C++, but I need VB.NET code for that..
I have done one way to create the button dataReader, but I have too many data to read, it's so slow when it load the data..so I need to find the only way faster to do it is datagrid..
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the downloadable sample from the syncfucion winforms faq page should get you started.
http://www.syncfusion.com/faq/winforms/search/888.asp
-jim
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I have a problem of this one..I tried to use this example, but I never get it to work..and I don't know how to do the pint and buttowdraw..there is problem of the button column..
it runs fine in the example code, but when I do my own code, there is error in the mouseup and mousedown, and I don't know what's wrong of my code.
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can you post your mouseup and mousedown code? i'll have a look to see if i can determine what the problem is.
-jim
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I have the error at here at the code below: isClickInCell = e.X > rect.Right - Me._buttonFace.Width
Public Sub HandleMouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
Dim dg As DataGrid = Me.DataGridTableStyle.DataGrid
Dim hti As DataGrid.HitTestInfo = dg.HitTest(New Point(e.X, e.Y))
Dim isClickInCell As Boolean = (hti.Column = Me._columnNum And hti.Row > -1)
Dim rect As New Rectangle(0, 0, 0, 0)
If isClickInCell Then
rect = dg.GetCellBounds(hti.Row, hti.Column)
isClickInCell = e.X > rect.Right - Me._buttonFace.Width
End If
If isClickInCell Then
Dim g As Graphics = Graphics.FromHwnd(dg.Handle)
DrawButton(g, Me._buttonFacePressed, rect, hti.Row)
g.Dispose()
_pressedRow = hti.Row
End If
End Sub
could you see what's wrong of that?
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it can output the data, but the button column not show in button, when I click the button column, then give me these errors:
System.NullReferenceException: Object reference not set to an instance of an object.
at ResultOutput.DataGridButtonColumn.HandleMouseDown(Object sender, MouseEventArgs e) in C:\vb.net\ResultOutput\DataGridButtonColumn.vb:line 86
at System.Windows.Forms.Control.OnMouseDown(MouseEventArgs e)
at System.Windows.Forms.DataGrid.OnMouseDown(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
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the line 86 is this:isClickInCell = e.X > rect.Right - Me._buttonFace.Width
the same as last msg
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hi lisa, this is happening when you run the test app? it runs fine on my machine. are you sure you haven't modified the code at all in the test project. the line of code you reference above is erroring at line 86, but that line of code is at 94 (or so, I don't have the project open right now) in the project that I downloaded yesterday.
as for the error though i would step through the code to ensure that the rect and _buttonface objects are being created properly.
_buttonface is being created in the objects constructor while rect is being created just before the line that's erroring out.
those are the only two objects that could possibly be a null reference in that line as far as i can tell.
-jim
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Thanks Jim..
I can run the example I downloaded in that site. But there is a problem that's I don't understand the DataGridButtonColumn.vb file, I don't know any about the DrawButton, DrawImage, MouseDown, MouseUp...and if I copy their codes to my application, then it can't work..
by the way, do you know where this colNum naem called from?
public sub new(byval colNum as integer)
_columnNum = colNum
_pressedRow = -1
-Lisa
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I have some problem with serilaization can anybody help me. I wanted to serialize a Treenode and desiralize the same but desiralization not worked.
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What errors are you getting?
What does the serialization and deserialization code look like?
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi all,
For some reason, my system does not like running the saveDib command used in video capture software. I was wondering if there are any known conflicts? I'm running Win 200 NT.
Thanks,
Grant
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... And this has what to do with VB.NET???
You haven't given us anything to help you out. What does your code look like? What are you trying to do? What libraries are you using for the video cap?
Your going to have to be ALOT more specific about your problem if you want anyone to help you.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I want to be able to input some info from my form into a word document - like a mail merge. I've found tons of articles here about opening up a word doc but not how to insert objects from a vb.net form into it. All the info that I want to put into the word doc are in seperate txt boxes and cmbo boxes. Any help is appreciated!
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also...I want to design a document in MS Word. Can I still do this with word 2003 basic and vs.net 2002? Or do I have to buy vs.net 2003 Pro + office 2003? If I don't, where can I get info about creating the word documents without the purchases? I've been doing some research...
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I have a custom made shell running in place of the normal windows desktop, and form this the user can select an icon that will run a Perl executable. This then calls another application (known as ui.exe) and terminates. The problem I have is that I am trying to find when the application (ui.exe) is closed down. I can't use the WaitForSingleObject because this will only trap when the Perl executable completes.
Therefore I decided to use the EnumProcesses API to get the ProcessIDs currently running, and then to use OpenProcess to get the process handles. After this I have put in place the API EnumProcessModules followed by GetModuleFileNameEx to ensure which processId goes with the application name ui.exe. I was then hoping to use the ui.exe application name and monitor this via the use of a timer that will continuously check for the processId running. When it finishes then I was going to log this in a file.
However when I call OpenProcess the process handles returned are always 0 (although at this stage I only have processes running such as explorer.exe). I have set the desired access to be PROCESS_QUERY_INFORMATION or PROCESS_VM_READ. I have also tried PROCESS_ALL_ACCESS but that did not seem to help.
I am currently running the application in development to see what information I get back.
Can anyone help me out on this.
Simes
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I need to know how to make a vb.net sub that handles checking or unchecking a checkbox in this datagrid. The asp.net code I used to create the datagrid is below.
Thank You for any help!
<asp:datagrid id="dgCons" runat="server" Height="196px" Width="259px" Font-Size="10pt" BackColor="White" BorderWidth="1px" BorderStyle="None" CellPadding="4" BorderColor="#3366CC">
<SelectedItemStyle Font-Bold="True" ForeColor="#CCFF99" BackColor="#009999"></SelectedItemStyle>
<ItemStyle ForeColor="#003399" BackColor="White"></ItemStyle>
<HeaderStyle Font-Size="Smaller" Font-Bold="True" ForeColor="Navy" BackColor="InactiveCaptionText"></HeaderStyle>
<FooterStyle ForeColor="#003399" BackColor="#99CCCC"></FooterStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<asp:CheckBox id="chk" runat="server" Checked='<%# Databinder.eval(container.dataitem, "There") %>' Visible=true>
</asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle BorderWidth="1px" BorderColor="White" HorizontalAlign="Left" ForeColor="#003399" BackColor="#99CCCC" Mode="NumericPages"></PagerStyle>
</asp:datagrid>
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I have the next problem:
In text field I print some numeric value, which can't be out of some range. if it is, the next code inits Message Box:
If CLng(txtTriggerActions(Index).Text) > MAX_TIME Then
MsgBox GetResorceString(ME_txtMAX_VALUE_IS) & " " & CStr(MAX_TIME), vbApplicationModal + vbExclamation, GetResorceString(ME_mWARNING)
txtTriggerActions(Index).Text = CStr(MAX_TIME)
Exit Sub
End If
But Message Box as a result is not Modal. probably it can't determine to whom hat it to be modal, as it is initialized in some another frame (in java frame). what to do ? thanks to attention.
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Hi,
I have a DTPicker control in my Program and I want to embed a Check box in it.
So I wrote the below line:
DTPicker1.CheckBox = True
But the inital value of that check box is checked
I want a Check Box in DTPicker in which it is not initially checked.
In the Property Page of DTPicker ,I tried to uncheck it and Apply, But it is not reflecting in the Application.
Will anybody please go thru the problem and Solve it For me?
Thanx,
Vimal.
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Hi..
1) Do I need to set a collection obect to Nothing?
2) Wot difference it makes if I Create a collection object as
Dim objSysParam as Collection
Or
Dim objSysParam as new Collection
Thnx
____________________________________________________________
rishabhs
I think therefore I am.
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It is always safe to destroy an object, which you do not need them any more.
Moreover, the new keyword with Dim statements will initialize the associated object immediately and it will reside in the memory as long as the sub/function/module or project's scope.
Cheers 
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Dear sir,
My name is tamilarasan.m i am studied in diploma in computer engineering final year,my last sem i ll submitted project(application orriented),
i am planning to winamp modification(equlizier)then additional i add to ring tone are send to mobile IRDA & BLUETOOTH,then additional to add file converter
DVD cds playing so you please kindly help for me sir(send please sourcecode)
thanking you
yours friendly
tamilarasan.m
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anybody can help me: how the source code to make accounting database (for banking)
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Hello there,
Your email is too brief. I would be glad if you can describe briefly on what you really want and how your accounting .... is structured. Are you writing an accounting applications software? The reason I am asking is that I am working on to build something in that area.
Ben
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