C# Discussion Boards - CodeProject

22-Jul-05 9:47

Here's the deal:

I have a pointer to some unmanaged code, in the form of IntPtr.
It's a callback. Now how do I call it?

Alomgir Miah22-Jul-05 10:04

22-Jul-05 10:04

See if this helps

http://www.codeproject.com/csharp/Win32_to_NET.asp

Live Life King Size
Alomgir Miah

EssOEss22-Jul-05 10:35

22-Jul-05 10:35

No, I'm afraid that is doing the thing in reverse. It is calling a .Net callback from unmanaged code. I, however, have the callback in unmanaged code and need to call it from .Net.

Every article about this seems to assume that the .Net app is "in control", which is really annoying, since right now, .Net is taking the orders from unmanaged code and I have no reference to go by Frown | :(

leppie22-Jul-05 11:17

leppie

22-Jul-05 11:17

I just answered this for another person today... right here...

http://www.codeproject.com/script/comments/forums.asp?msg=1170341&forumid=1649#xx1170341xx[^]

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EssOEss22-Jul-05 11:36

22-Jul-05 11:36

Nono, it's the opposite.
I don't need to make a delegate into an IntPtr, I need to basically make an IntPtr into a delegate.

EssOEss22-Jul-05 22:43

Re: User Interface Problem

22-Jul-05 22:43

Looks like a mixed-mode wrapper might be the answer. I haven't managed to get it to work yet, though (due to the PtrToStructure problem a few posts above).

User Interface Problem

Soumya Mulukutla22-Jul-05 9:21

Soumya Mulukutla

22-Jul-05 9:21

Hi all,

I am building this GUI for a client I wrote some time back. I have done all the work on a Desktop machine in my office and it works fine. I have put it in a jumpdrive and tried still works fine (on the same machine). But when I bring it home and try it on my laptop, its has som weird problems.

My GUI has 2 dropdowns or the boxes called listboxes. When I run the program, these boxes are empty, they dont show me the items inside, tough they scroll and do take some random value from the list while excecuting. Is this some kind of property setting I am missing? Please do help me on this, as I am completed with everything else, and stuck here.

Sowmya Mulukutla,
UAB

leppie22-Jul-05 11:20

leppie

22-Jul-05 11:20

Windows Color scheme?

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Small DataGrid question

zaboboa22-Jul-05 8:53

zaboboa

22-Jul-05 8:53

Hello,

I have a datagrid: dataGridRevenues.
and tablestyles : styleLotYields.

How can I access particular cells in my datagrid, and how can I raise an
event on leaving a particular cell.

Thank you

Re: Small DataGrid question

Alomgir Miah22-Jul-05 9:23

Re: Small DataGrid question

22-Jul-05 9:23

int currentGridRow = 0;
int currentGridColumn = 0;

this.dataGridRevenues.CurrentCellChanged += new EventHandler(this.OnGridCurrentCellChanged);
styleLotYields[0].TextBox.Leave = new EventHandler(this.CellLeave);

private void CellLeave(object sender, EventArgs e)
{
if ( this.currentGridRow == 9 && this.currentGridColumn == 2 )
{
//Do some stuff
}
}

private void OnGridCurrentCellChanged(object sender, EventArgs e)
{
DataGridCell dataGridCell = this.dataGridRevenues.CurrentCell;
this.currentGridRow = dataGridCell.RowNumber;
this.currentGridColumn = dataGridCell.ColumnNumber;
}

Live Life King Size
Alomgir Miah

Srinivas Jonnalagadda23-Jul-05 8:08

Srinivas Jonnalagadda

23-Jul-05 8:08

Adding to this i have a new question. How would i find the cell if it is a master detail datagrid and i want to fing cell in the inner grid?

Srinivas

Distributed Tiers cominication messages

machocr22-Jul-05 7:45

machocr

22-Jul-05 7:45

Hi, I have a distributed application conecting presentation and busines rules tierswith remoting in tpc channel.
I want to send messages to the client (presentation tier) from server (business rules tier) but not with exceptions.
I want to show these mesaages into popup ballon un the presentation aplication. In most of the cases these mesaages will be abou sqlinfomessages of the connections.
I think i need to use Message queue MSMQ but I dont Know how. Confused | :confused:

What I need to do to acommplish this or watha othre way can I do and how. Please help me! Cry | :((

Thank you!
Cool | :cool:

La realidad no es más que impulsos eléctricos del cerebro - Morpheus

C# UserControl in a Win32 Window

dirkhelmet!@yahoo.com22-Jul-05 7:01

dirkhelmet!@yahoo.com

22-Jul-05 7:01

I'm not sure if this is the best forum for this, but I'll give it a shot. We have a large Win32 app (not MFC) - with many windows. We have developed many re-usable business-specific panels that we load into these windows at runtime based on a users configuration.

Now that we are moving to .Net and C#, it would be a big advantage to be able to create re-usable panels in C# and add them to our Win32-based framework. We have successfully done this before with ActiveX components - like the browser control for example. Basically we manage the activex control window's geometry in place within our Win32 window.

Would we be able to do something similar with a C# user control? Any ideas on how to proceed here?

Re: C# UserControl in a Win32 Window

Alomgir Miah22-Jul-05 7:39

Problems Reading Cell Values from Excel Spreadsheets Using OleDB

22-Jul-05 7:39

You can use Interop to achieve this. tlbexp utility is the answer.
Please visit msdn.microsoft.com for the details. I have done this
successfully in my project.

Alomgir Miah
Live Life King Size

fmarcos22-Jul-05 6:55

fmarcos

22-Jul-05 6:55

Hello there!

I am trying to import data from excel spreadsheets to store it in datasets using OleDB, but something really weird is happenning for some cells.
What´s happening is that some cells (with non-null values)simply returns null.

Does anyone have any clue? Has someone experienced the same behaviour?

I would be thankful if someone could hel me with this issue.

Hugs,

Fernando Miranda
M.Sc., Software Developer
dollar_br@yahoo.com
Rio de Janeiro - Brasil

Re: Problems Reading Cell Values from Excel Spreadsheets Using OleDB

fmarcos22-Jul-05 7:18

fmarcos

22-Jul-05 7:18

Hello,
I figured out what´s happening on this link http://support.microsoft.com/kb/194124/EN-US/[^]

[]s

Fernando Miranda
Software Developer
fmarcos.rj@ig.com.br
Rio de Janeiro - Brazil

writing to ms word document bookmarks

xrado22-Jul-05 6:33

xrado

22-Jul-05 6:33

can find article how to do it..can you help me

Re: writing to ms word document bookmarks

Alomgir Miah22-Jul-05 7:50

Re: writing to ms word document bookmarks

22-Jul-05 7:50

See if this helps

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_wrcore/html/wrwlkUsingXMLSchemaToPushTextToWordDocument.asp

Live Life King Size
Alomgir Miah

sameerhanda25-Jul-05 17:15

sameerhanda

25-Jul-05 17:15

You can try brute force...you can use the ExcelSheet.Range method/property to access the cell value.

Combobox.DisplayName and Interfaces

Miszou22-Jul-05 6:21

Miszou

22-Jul-05 6:21

I have a combobox that displays a list of dynamically loaded "plugin" objects, using the code below:

// Load the assembly.<br />
Assembly ControlLib = Assembly.LoadFrom( Location );<br />
<br />
// Create the plugin.<br />
object objPlugin = ControlLib.CreateInstance( ControlName );<br />
<br />
// Add the plugin to the combo box<br />
cboList.Items.Add( (IFTPlugin)objPlugin );

I have set the combobox "DisplayName" property to "Caption" (a member of the IFTPlugin interface), but it always calls ToString on the object instead and shows the assembly name instead of the friendly name.

I know that the object is loaded correctly, and that the "Caption" method is working, because I can call the following code and get the expected result:

string strCaption = ((IFTPlugin)objPlugin).Caption;

Rather than override the objects ToString function, is there a way to get the combobox to correctly call IFTPlugin.Caption ?

Thanks for your help.

The StartPage Randomizer

Re: Combobox.DisplayName and Interfaces

malharone22-Jul-05 6:41

malharone

22-Jul-05 6:41

Make sure to override "ToString()" method of the object you're adding to the dropdown. The dropdown will display the value returned by ToString and thus you dont need to set the databinding.
So ...

<br />
public class User<br />
{<br />
  string _fname;<br />
  string _lname;<br />
  public User(string FName, string LName)<br />
  {<br />
    _fname = FName;<br />
    _lname = LName;<br />
  }<br />
  public override string ToString()<br />
  {<br />
    return string.Format("{0}, {1}", _lname, _fname);<br />
  }<br />
}<br />
<br />
//--- your combo init method in form<br />
private void form2_Load(object s, System.EventArgs e)<br />
{<br />
  User[] arUsers = new User[2];<br />
  arUsers[0] = new User("John","Smith");<br />
  arUsers[1] = new User("Jane","Smith");<br />
  this.comboBox1.Items.AddRange(arUsers);;<br />
}<br />

hope this helps.

- Malhar

Re: Combobox.DisplayName and Interfaces

Alomgir Miah22-Jul-05 7:42