C# Discussion Boards - CodeProject

Re: c# adding events to programmaticlly added controls

22-Jul-09 1:10

Luc Pattyn wrote:
Control has a object Tag property that serves no particular purpose

It's purpose has always been to provide User-defined data associated with the object. I think it should be programmer-defined, but hey ho.

Panic, Chaos, Destruction.
My work here is done.

Luc Pattyn22-Jul-09 1:20

Luc Pattyn

22-Jul-09 1:20

That's what I meant to say, unlike the other properties Windows doesn't use it, so the programmer can store just anything in there.

Smile | :)

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Re: c# adding events to programmaticlly added controls

DaveyM6922-Jul-09 1:34

DaveyM69

22-Jul-09 1:34

Luc Pattyn wrote:
so the programmer can store just anything in there

Sshhh... some things should be kept secret, you may have just opened Pandoras Box!

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: c# adding events to programmaticlly added controls

Luc Pattyn22-Jul-09 1:39

Luc Pattyn

22-Jul-09 1:39

Someone had to put things in first for Pandora's box to work...

Smile | :)

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Re: c# adding events to programmaticlly added controls

Nagy Vilmos22-Jul-09 2:02

Re: c# adding events to programmaticlly added controls

22-Jul-09 2:02

DaveyM69 wrote:
just opened Pandoras Box!

I miss her Sigh | :sigh:

Panic, Chaos, Destruction.
My work here is done.

Luc Pattyn22-Jul-09 3:27

Luc Pattyn

22-Jul-09 3:27

She's still around, changed her name to WPF. Laugh | :laugh:

Luc Pattyn [Forum Guidelines] [My Articles]

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Re: c# adding events to programmaticlly added controls

DaveyM6922-Jul-09 3:47

DaveyM69

22-Jul-09 3:47

As I typed it, I remembered Spike's line in Notting Hill (I know that loses ALL my man points!) Laugh | :laugh:

Re: c# adding events to programmaticlly added controls

Nagy Vilmos22-Jul-09 3:54

Re: c# adding events to programmaticlly added controls

22-Jul-09 3:54

DaveyM69 wrote:
I know that loses ALL my man points

#grrrrrnnnt# Have some o'mine. They're in this here can'o'woopass, do you want me top open it for you?

Panic, Chaos, Destruction.
My work here is done.

allexserban22-Jul-09 1:12

allexserban

22-Jul-09 1:12

What i want to do is the folowing|:
when i click a line from the listview the text from it should appear in a textbox

Re: c# adding events to programmaticlly added controls

Nagy Vilmos22-Jul-09 2:03

How to login a user to a website using HttpWebRequest and HttpWebResponse

22-Jul-09 2:03

Read the previous answers, it's mostly there for you.
0. Listen for the event.
1. Identify which list raised it.
2. Read the value.
3. Wash, rinse and repeat.

Panic, Chaos, Destruction.
My work here is done.

sumit703422-Jul-09 0:45

sumit7034

22-Jul-09 0:45

I am trying to log a user into a site using HttpWebRequest or WebClient Class
Now the site will probably issue me some cookies that tell the browser i'm already logged in. I need to pass those cookies on subsequent requests so I can fetch the data on that page.

Thanks in advance

Re: How to login a user to a website using HttpWebRequest and HttpWebResponse

Member 103390722-Jul-09 1:24

Member 1033907

22-Jul-09 1:24

Exactly. As for the cookies, just copy all the cookies you receive in the Response to the subsequent Request(s). This is simple.

Re: How to login a user to a website using HttpWebRequest and HttpWebResponse

sumit703422-Jul-09 1:28

sumit7034

22-Jul-09 1:28

Can u Give me a sample code for that?

Re Sizing List View Column

satsumatable22-Jul-09 0:38

satsumatable

22-Jul-09 0:38

Hi,

I've a list box with 4 columns out of which one column has width as 0 and want to restrict the users to re size it and see the content. How can get this ?

Thanks

Re: Re Sizing List View Column

DaveyM6922-Jul-09 0:55

DaveyM69

22-Jul-09 0:55

If you don't want the content vsible, why put it in the visible part of the control at all? I would either:

0. Store the required non visible data in the Tag property of the ListViewItem
1. Subclass ListviewItem to have a new property of the correct type to store the data to avoid unboxing/boxing associated with 0.

Re: Re Sizing List View Column

Mycroft Holmes22-Jul-09 1:00

Mycroft Holmes

22-Jul-09 1:00

I thought, oh here we go that's s stupid question. Then I read the details and remembered that I have the same problem, not one I worry about but it is there.

I use a DGV if I need to hide a column, it support visible. I also have a utility that loads any table/dataview into a listview that assumes the first field is the ID and it gets loaded into the tag property.

If the list is short I sometimes load the datarow into the tag property and only create cols for the fields I want to display.

Never underestimate the power of human stupidity
RAH

Some questions about using the C# code compiler ( CSharpCodeProvider ) [modified]

MafiaMoe22-Jul-09 0:38

MafiaMoe

22-Jul-09 0:38

Have some issues and questions about creating a .dll from code in the form of a string array and a file. I seem to be close, but errors are raised when the code tries to creat the .dll.

Main question is, does the 'OutputAssembly' refer to the file name to create? Whenever I run the code below it says it could not find the file that 'cp.OutputAssembly' is set to. Also if this line is commented out, it says it could not find a randomly named file in a temporary directory.

The other question I have is if there is any difference between creating the .dll from an existing file or a string array. I plan on having the system create a common .dll for both the main program and for other .dll's the main program creates. These non-common .dll's can then be used directly in other programs.

This code is to create the common .dll .

public CompilerResults CompileImageAquisition(string OutputFile)
        {
            CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");

            CompilerParameters cp = new CompilerParameters();

            CodeTypeReferenceCollection cref = new CodeTypeReferenceCollection();

            cp.OutputAssembly = OutputFile;
            cp.GenerateInMemory = false;
            cp.TreatWarningsAsErrors = false;
            cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\PresentationCore.dll");
            cp.ReferencedAssemblies.Add("System.Drawing.dll");
            cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\System.Windows.Forms.dll");
            cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\System.XML.dll");

            CompilerResults cr = provider.CompileAssemblyFromFile(cp, ImageCoderSourceLocation);

            if (cr.Errors.Count > 0)
            {
                // Display compilation errors.
                Console.WriteLine("Errors building {0} into {1}", ImageCoderSourceLocation, cr.PathToAssembly);
                foreach (CompilerError ce in cr.Errors)
                {
                    Console.WriteLine("  {0}", ce.ToString());
                    Console.WriteLine();
                }
            }
            else
            {
                // Display a successful compilation message.
                Console.WriteLine("Source {0} built into {1} successfully.", ImageCoderSourceLocation, cr.PathToAssembly);
            }

            return cr;
        }

modified on Wednesday, July 22, 2009 6:51 AM

Re: Some questions about using the C# code compiler ( CSharpCodeProvider )

MafiaMoe22-Jul-09 11:44

MafiaMoe

22-Jul-09 11:44

Replying to my own post. After some extra debugging I was able to get the compile sequence to create a .dll. Here is and updated code to show what was changed and give a working example for anyone else to use as an example.

'OutputFile' has the directory of the file you wish to create such as "C:\\Folder\\File.dll". You can also set 'cp.GenerateExecutable = True' to have it create a .exe file.

'cref' is the directory to a C# file, such as "C:\\Folder\\Code.cs", but can also be a .txt.

You should be able to modify the code so the 'ReferencedAssemblies.Add' lines look more like "cp.ReferencedAssemblies.Add("System.dll");", but I was having some issues with it not being able to compile without the full path. This could just be a bug in VS2010 beta.

public CompilerResults CompileImageAquisition(string OutputFile)
{
    CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");

    CompilerParameters cp = new CompilerParameters();

    CodeTypeReferenceCollection cref = new CodeTypeReferenceCollection();

    cp.OutputAssembly = OutputFile;
    cp.GenerateInMemory = false;
    cp.TreatWarningsAsErrors = false;
    cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\System.dll");
    cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\PresentationCore.dll");
    cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\System.Drawing.dll");
    cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\System.Windows.Forms.dll");
    cp.ReferencedAssemblies.Add("C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0\\System.XML.dll");

    CompilerResults cr = provider.CompileAssemblyFromFile(cp, ImageCoderSourceLocation);

    if (cr.Errors.Count > 0)
    {
        // Display compilation errors.
        Console.WriteLine("Errors building {0} into {1}", ImageCoderSourceLocation, cr.PathToAssembly);
        foreach (CompilerError ce in cr.Errors)
        {
            Console.WriteLine("  {0}", ce.ToString());
            Console.WriteLine();
        }
    }
    else
    {
        // Display a successful compilation message.
        Console.WriteLine("Source {0} built into {1} successfully.", ImageCoderSourceLocation, cr.PathToAssembly);
    }

    return cr;
}

Stream Reader Problem

Paul Unsworth22-Jul-09 0:09

22-Jul-09 0:09

Hi Guys

I have quite an urgent problem which is really getting on my nerves...

I have a stream reader which goes through a file line by line, and extracts information. The problem I have though, is that for some reason, the very first character is getting left out...

string chkLine = ChkReader.ReadLine()

Does anybody know why this could be happening? Frown | :(

Thanks

oooo, the Jedi's will feel this one....

OriginalGriff22-Jul-09 0:26

OriginalGriff

22-Jul-09 0:26

Is the first character anything special? What encoding are you using? Is the first character even there - check with a hex editor?
I use StreamReader quite a bit, and it's never given me a problem, and never left out any characters.

No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.

This message is made of fully recyclable Zeros and Ones

Paul Unsworth22-Jul-09 0:43

22-Jul-09 0:43

The first character is a number. nothing special. It misses all of them though. It's not like it's just dropping a leading zero... It is very baffeling. Just does not make any sense. Frown | :(

oooo, the Jedi's will feel this one....

OriginalGriff22-Jul-09 1:04

OriginalGriff

22-Jul-09 1:04

You mean it misses the first character of every line?

File:

0Hello
1There
2Goodbye

gives you three lines "hello", "There" and "Goodbye"?
What is so different about your code from the standard and very boring:

using (StreamReader sr = new StreamReader(@"C:\XXTemp\Lines.txt"))
    {
    string s;
    while ((s = sr.ReadLine()) != null)
        {
        MessageBox.Show(s);
        }
    }

No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.

This message is made of fully recyclable Zeros and Ones

Paul Unsworth22-Jul-09 1:20

22-Jul-09 1:20

My code is:

while (chkReader.Read())
{
   string chkLine = chkReader.ReadLine();
}

I just created a new text file of my very own and pointed my app at it and got the following:
Actual line in file: "Hello There"
Line picked up in chkReader.ReadLine(): "ello There"

Sigh | :sigh:

oooo, the Jedi's will feel this one....

OriginalGriff22-Jul-09 1:23

OriginalGriff

22-Jul-09 1:23

There's your problem: the while(chkReader.Read()) reads and discards the first character of each line...

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This message is made of fully recyclable Zeros and Ones

Paul Unsworth22-Jul-09 1:38