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I need to display icons next to items in a listview (using gridview) with WPF. Does anyone have a sample of this ?
Johan Lombaard
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former - Albert Einstein
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Normally I would suggest using an asp:Image control, but I am not sure if the ImageUrl support Icon files. Why wouldn't you use gif or jpg files instead? Anyway, it might work with icon files. First create a new column that is a template column in your gridview. Once you have a template column you have an ItemTemplate and an EditTemplate. Create an asp:Image control in the itemtemplate and bind it to the correct variable that has the imageurl in it. If you allow editing to your grid view you will need to add it there as well if you want the image to be seen when editing.
Hope that helps.
Ben
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hi
how can i convert a decimal value to its ASCII equivalent in C#?
thanks
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Probably char c = 65 would do it.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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try this code:
<br />
private string ConvertToAscii(decimal value)<br />
{<br />
Encoding ascii = Encoding.UTF32;<br />
<br />
char chr = (char)value;<br />
Byte[] bty = ascii.GetBytes(chr .ToString());<br />
<br />
return ascii.GetString((bty));<br />
}<br />
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Why on earth does it take a decimal ?
This looks like a convoluted mess to me. I just did this and traced in the debugger:
int n = (int)'C';
char c = (char)n;
it worked just fine.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Hi,
My question is "How to send a user defined variable value while calling eventhandler.
Pls go thru the below example:
1. I have an array of Pictureboxes arranged on a Panel
2. I have handled the Click event on PictureBoxes as below but dont know:
how to pass "string FilePath" as part of "Object sender"
<br />
<br />
string FilePath;
picBoxes[index].Click += new System.EventHandler(ClickHandler);<br />
<br />
...<br />
...<br />
<br />
public void ClickHandler(Object sender, System.EventArgs e)<br />
{<br />
<br />
PictureBox pbx = new PictureBox();<br />
pbx = (PictureBox) ((System.Windows.Forms.PictureBox)sender);<br />
<br />
<br />
}<br />
<br />
Thanks
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Hello,
I think what you want to do is only possible with an Inherited class and the usage of Custom Eventargs.
1) Inherit a class from PictureBox
public class SpecialPictureBox : System.Windows.Forms.PictureBox
2) Add a string property FilePath
private string _filepath = "";
[System.ComponentModel.DefaultValue("")]
public string FilePath
{
get
{
return _filepath;
}
set
{
_filepath = value;
}
}
3)Inherit a class from System.EventArgs with a string member
public class SpecialEventArgs : System.EventArgs
{
public string filepath;
public SpecialEventArgs(string _filepath)
{
filepath= _filepath;
}
}
4)Create a delegate for your special event in your SpecialPictureBox class, which uses the SpecialEventArgs.
public delegate void SpecialEvent(object sender, SpecialEventArgs specialEA);
5)Create an event which uses the delegate
public event SpecialEvent SpecialChanged;
6)override the OnClick event of your PictureBox and fire the event, with the Filepath property.
if(SpecialChanged!=null)
{
SpecialChanged(this, new SpecialEventArgs(this.FilePath));
}
7)In your Form Handle the SpecialChanged event and set the FilePath property
yourSpecialPictureBox.FilePath = "yourpath";
yourSpecialPictureBox.SpecialChanged+= new YourNamespace.SpecialEvent(yourSpecialPictureBox_SpecialChanged);
private void yourSpecialPictureBox_SpecialChanged(object sender, SpecialEventArgs specialEA)
{
}
Hope it helps!
-- modified at 5:35 Friday 27th July, 2007
All the best,
Martin
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Oh wow, didnt think about it! let me try. Thank you Martin. 
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You are wellcome!
Hope it works out for you.
Please let us know.
All the best,
Martin
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In .NET Framework 2.0, if you're following the EventArgs pattern, you don't need to declare your own delegate, you can use the generic EventHandler<T> delegate. Saves time and metadata space.
So you'd have
public event EventHandler<SpecialEventArgs> SpecialChanged;
yourSpecialPictureBox.SpecialChanged +=
new EventHandler<SpecialEventArgs>(yourSpecialPictureBox_SpecialChanged); I'm finding this pretty handy.
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Hello Mike,
Mike Dimmick wrote: In .NET Framework 2.0,
I'm one of the poor, who have to work with .Net1.1 only.
But thanks for the info!
All the best,
Martin
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Yes, This solution works properly!  though a bit advanced for me!
thanks
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Glad I could help!
Thanks for the feedback!
All the best,
Martin
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Hi,
I want include the some Matlab lib files in my C# progrm than what is a procedure to link the matlab with C#.Net?
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There isn't one, unless matlab comes in dlls you can p/invoke
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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There is no direct way to use the Matlab files in C# however, using the Matlab Builder for .Net you can convert Matlab functions to .Net methods. Write all the required function in m-code (encapsulate) and build using .Net Builder which will generate a .Net Assembly file which can be used in your C# program.
You will need Matlab version R2006a (with MATLAB Builder for .NET).
Also checkout the website http://www.mathworks.com/access/helpdesk/help/toolbox/dotnetbuilder/[^]
Hope this works!
~Sky
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Hi,I have a problem. I have a DirectX application written in C++ and i want to embed it in a C# Windows form. Is that possible and how?
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Not really, no, you can't embedd one app in another in a supportable way.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I use the following code (obvious not my coding) in my program:
public static bool CovertToGray(Bitmap bmp)<br />
{<br />
<br />
BitmapData bmData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height),<br />
ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);<br />
int stride = bmData.Stride;<br />
System.IntPtr Scan0 = bmData.Scan0;<br />
unsafe<br />
{<br />
byte* p = (byte*)(void*)Scan0;<br />
byte red, green, blue;<br />
int nOffset = stride - bmp.Width * 3;<br />
for (int y = 0; y < bmp.Height; ++y)<br />
{<br />
for (int x = 0; x < bmp.Width; ++x)<br />
{<br />
blue = p[0];<br />
green = p[1];<br />
red = p[2];<br />
p[0] = p[1] = p[2] = (byte)(.299 * red<br />
+ .587 * green + .114 * blue);<br />
p += 3;<br />
}<br />
p += nOffset;<br />
}<br />
}<br />
bmp.UnlockBits(bmData);<br />
return true;<br />
}
Questions are
What is the function of BitmapData?
Why PixelFormat.Format24bppRgb is used?
What is this int stride = bmData.Stride;?
Why unsafe used?
In short I can’t understand the 50% of above code for convert the picture in grayscale format?
I want learn……..please guide me …..I am waiting for your response
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1 - it contains the bits of the image
2 - probably because 32 bits is a waste of time and < 24 is hard to process
3 - each image in memory has an area at the end of each scanline which does not contain pixels and should not be accessed.
4 - because you can't use pointers in C# outside an unsafe block
This looks like it came from my image processing article, didn't I explain all of this there ?
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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minimilist question
minimilist answer [^]
"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF
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With the ToArray() method
Seriously, your question makes no sense, what is in the struct, that it makes sense to turn it into an array ?
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Hi...
I am newbie in c#, please help me on clr trigger.
I have done a clr trigger and everytime i debug my c# code,an error occured on this part
AIClass.AICheck.checkUserRole();
The error description is like this :->
InvalidOperationException was Unhandled
The requested operation requires a SqlClr context, which is only available when running in the Sql Server process.
I dont know what to do...
And I cannot create a trigger inside Sql Server Express Edition 2005. I did like this:->
create trigger tgAI
on AIEvent
for insert
as
external name
AIAssembly.AIClass.userRoleCheck
and the error appeared:-> Msg 6505, Level 16, State 1, Procedure tgAI, Line 1
Could not find Type 'AIClass' in assembly 'AIClass'.
my code in c# is like this (will be called in the main class in console App.):->
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Server;
using System.Data;
using System.Data.SqlClient;
namespace AIClass
{
public class AICheck
{
//[SqlTrigger(Event = "FOR INSERT", Name = "AI_tg", Target = "AIEvent")]
public static void checkUserRole()
{
SqlTriggerContext tgContext = SqlContext.TriggerContext;
//SqlConnection conn = new SqlConnection("Data Source=DIMENSION3000\\SQLEXPRESS; Initial Catalog=AITania; User Id=sa; Password=123456");
using (SqlConnection conn = new SqlConnection("context connection=true"))
conn.Open();
SqlCommand cmd = conn.CreateCommand();
SqlDataReader reader;
string msg = "";
if (tgContext.TriggerAction == TriggerAction.Insert)
{
//SqlCommand sqlComm = new SqlCommand();
//SqlPipe sqlPipe = SqlContext.Pipe;
cmd.CommandText = "SELECT * FROM INSERTED";
reader = cmd.ExecuteReader();
//sqlComm.Connection = conn;
//sqlComm.CommandText = "SELECT * FROM INSERTED";
//for (int x = 0; x < tgContext.ColumnCount; ++x)
//{
// msg += string.Format("Column {0} {1} been updated{2}", x, (tgContext.IsUpdatedColumn(x) ? "has" : "has not"), Environment.NewLine);
//}
for (int i = 0; i < reader.FieldCount;i++ )
{
msg = msg + reader.GetName(i) + ":" + (string)reader[i] + " ";
}
}conn.Close();
}
}
}
Please help me..
thanks..
-jack-
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