C# Discussion Boards - CodeProject

Re: Interface type or class type?

shivapriyak24-Sep-09 0:36

shivapriyak

24-Sep-09 0:36

thanks for the reply. Now i got it.

Re: Interface type or class type?

PIEBALDconsult24-Sep-09 5:22

PIEBALDconsult

24-Sep-09 5:22

Using List also allows you to call its AsReadOnly method if you return it from the method:

public IList<T>
F<T>
(
)
{
    List<T> result = new List<T>() ;
...
    return ( result.AsReadOnly() ) ;
}

Import Excel to Database

Member-495917623-Sep-09 18:53

Member-4959176

23-Sep-09 18:53

Dear All,

I want to implement the following functionality:

Read the mapping of the columns of excel and table from XML.
Create a dynamic query to insert the excel data into the columns of the table according to the mapping.
It should not insert in the identity column if any.

Plz help. Its very urgent.

Thanks in advance.

Re: Import Excel to Database

Richard MacCutchan23-Sep-09 22:39

Richard MacCutchan

23-Sep-09 22:39

Member 4959176 wrote:
Its very urgent.

This is considered impolite.

Show what you have done to implement this functionality and which parts you find do not work correctly. If you are expecting someone else to do the work for you, you are looking in the wrong place.

image to PDF in C# 2008

vijaykumarp23-Sep-09 17:36

vijaykumarp

23-Sep-09 17:36

I converted the image to PDF.

I want to extract the PDF as 5 individual image files.

In that case its make a problem. In that PDF File has 5 images, its extracting as one jpg.

IF original PDF contains 5 images means, can extract as 5 individual jpg file

thats the problem for me.

thanks in advance...

Re: image to PDF in C# 2008

Christian Graus23-Sep-09 18:16

Christian Graus

23-Sep-09 18:16

You cannot be doing this without using a third party library. You should post in a forum for that library, or, at least tell us what library it is, and post some code, and hope that someone else here has used it.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Re: image to PDF in C# 2008

vijaykumarp23-Sep-09 21:39

vijaykumarp

23-Sep-09 21:39

Here is the code, im using PDFsharp lib for convert img to PDF.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;
using PdfSharp;
using PdfSharp.Pdf;
using PdfSharp.Drawing;

namespace TreeListViewDragDrop
{
public partial class ImageToPDF : Form
{

private string srcFile, destFile;
bool success = false;

public ImageToPDF()
{
InitializeComponent();
}

private void btnSelectSrc_Click(object sender, EventArgs e)
{
if (ofdSrcFile.ShowDialog() != DialogResult.OK)
return;

srcFile = ofdSrcFile.FileName;
txbxSrcFile.Text = srcFile;

txbxDestFile.Text =
Path.GetDirectoryName(srcFile) + "\\" +
Path.GetFileNameWithoutExtension(srcFile) + ".pdf";
destFile = txbxDestFile.Text;
}

private void btnSelectDest_Click(object sender, EventArgs e)
{
if (sfdDestFile.ShowDialog() != DialogResult.OK)
return;

destFile = sfdDestFile.FileName;
txbxDestFile.Text = destFile;
}

private void btnConvert_Click(object sender, EventArgs e)
{
errProv.Clear();

if (txbxSrcFile.Text.Length == 0)
{
errProv.SetError(txbxSrcFile, "Please point source file.");
return;
}
else if (txbxDestFile.Text.Length == 0)
{
errProv.SetError(txbxDestFile, "Please point destination file.");
return;
}

success = false;
bw.RunWorkerAsync(new string[2] { srcFile, destFile });
toolStripProgressBar1.Style = ProgressBarStyle.Marquee;

ImageToPDF ImageToPDF = new ImageToPDF();
ImageToPDF.Close();

MainForm PDFForm = new MainForm();
PDFForm.Show();

this.Visible = false;

}

private void bw_DoWork(object sender, DoWorkEventArgs e)
{
try
{
string source = (e.Argument as string[])[0];
string destinaton = (e.Argument as string[])[1];

PdfDocument doc = new PdfDocument();
doc.Pages.Add(new PdfPage());
XGraphics xgr = XGraphics.FromPdfPage(doc.Pages[0]);
XImage img = XImage.FromFile(source);

xgr.DrawImage(img, 0, 0);
doc.Save(destinaton);
doc.Close();
success = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}

private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
toolStripProgressBar1.Style = ProgressBarStyle.Blocks;
toolStripProgressBar1.Value = 0;

if (success)
MessageBox.Show("The converion ended successfully.", "Done", MessageBoxButtons.OK, MessageBoxIcon.Information);
}

private void button1_Click(object sender, EventArgs e)
{
errProv.Clear();

if (rbSrc.Checked && txbxSrcFile.Text.Length == 0)
{
errProv.SetError(txbxSrcFile, "Please point source file.");
return;
}
else if (rbDest.Checked && txbxDestFile.Text.Length == 0)
{
errProv.SetError(txbxDestFile, "Please point destination file.");
return;
}

try
{
if (rbSrc.Checked)
Process.Start(srcFile);
else if (rbDest.Checked)
Process.Start(destFile);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}

}
}
}

Convertion image to PDF in C# 2008

vijaykumarp23-Sep-09 17:22

vijaykumarp

23-Sep-09 17:22

Re: Convertion image to PDF in C# 2008

Christian Graus23-Sep-09 18:17

Christian Graus

23-Sep-09 18:17

This is a useless question. I explained why above. Posting it twice, only makes it worse.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Problems with getting UserDeletingRow event to work.

gjx_junxian198923-Sep-09 17:06

gjx_junxian1989

23-Sep-09 17:06

When i delete the row in a datagridview, it does not act accordingly with my UserDeletingRow event. I am clueless about what is wrong with my codes or why it does not work. Anyone knows the problem? Thanks!

// dataGridView1
            // 
            this.dataGridView1.AllowUserToAddRows = false;
            this.dataGridView1.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.AllCells;
            this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Location = new System.Drawing.Point(15, 70);
            this.dataGridView1.MultiSelect = false;
            this.dataGridView1.Name = "dataGridView1";
            this.dataGridView1.ReadOnly = true;
            this.dataGridView1.Size = new System.Drawing.Size(92, 173);
            this.dataGridView1.TabIndex = 72;
            this.dataGridView1.UserDeletingRow += new System.Windows.Forms.DataGridViewRowCancelEventHandler(this.dataGridView1_UserDeletingRow);


private void delete1_Click(object sender, EventArgs e)
        {
            textBox1.Text = dataGridView1.Rows[dataGridView1.CurrentCell.RowIndex].Cells[dataGridView1.CurrentCell.ColumnIndex].Value.ToString();
            dataGridView1.Rows.Remove(dataGridView1.CurrentRow);

        }

private void dataGridView1_UserDeletingRow(object sender, DataGridViewRowCancelEventArgs e)
        {
            textBox4.Text = "yeah";

        }

POP3Temp folder ids not Found

shobhit parasher23-Sep-09 13:05

shobhit parasher

23-Sep-09 13:05

Hi,

i m using the following code for read the attchment but i get the error.
when i send a same id for exp -sender test@test.com to reciever id info@test.com. than i got the error- Could not find a part of the path 'c:\POP3Temp\'.

but i send mail to exp -sender sss@gmail.com to reciever id info@test.com.
than red the attchment fine . no error

try {
Pop3Client email = new Pop3Client("user", "password", "mail.server.com");
email.OpenInbox();

while( email.NextEmail())

{
if(email.IsMultipart)
{
IEnumerator enumerator = email.MultipartEnumerator;
while(enumerator.MoveNext())
{
Pop3Component multipart = (Pop3Component)
enumerator.Current;
if( multipart.IsBody )
{
Console.WriteLine("Multipart body:"+
multipart.Body);
}
else
{
Console.WriteLine("Attachment name="+
multipart.Name); // ... etc

}
}
}
}

email.CloseConnection();

}

pls give the solution.

Thanks

How to dynamically use C# 3.5 compiler

pbalaga23-Sep-09 11:07

pbalaga

23-Sep-09 11:07

For several months I've used dynamic compiler in my app that mounted a dll on start-up. But today I came across a painful problem. The code that can be compiled trouble-free in vc#08 has syntax errors according to the 'dynamic' compiler (let me call it dynamic for distinction).

The piece of code in mind looks like this:

void foo()
{
//...
        ActorDescription actorDesc = new ActorDescription()
        {
            BodyDescription = new BodyDescription(70)
        };
//...
}

The dynamic compiler shows an error : "error CS1002: ; expected". After simple test I managed to find out that the dynamic compiler probably aims at an older framework and I'm trying to use newer syntax features.

In shortcut, what I was using is this:

System.CodeDom.Compiler.CodeDomProvider cdp =
      System.CodeDom.Compiler.CodeDomProvider.CreateProvider("CSharp");
  System.CodeDom.Compiler.CompilerResults cr = cdp.CompileAssemblyFromFile(parameters, fullPaths);

The functions above are contained by System.dll v2.0 library, so it's not surprising it won't work. Anyway, System.dll v3.5 doesn't exist. Where is the new set of methods to compile according to the newest c# specification? What's the workaround for this? I've been googling for a few hours with no answer.

Thanks in advance! Smile | :)

Re: How to dynamically use C# 3.5 compiler

PIEBALDconsult23-Sep-09 12:07

PIEBALDconsult

23-Sep-09 12:07

CodeDom should use whatever the newest installed compiler is.

I assume that if you installed VS 2010 you'd have the C# v4.0 compiler and it should work fine.

(I haven't, so I can't investigate.)

Re: How to dynamically use C# 3.5 compiler

pbalaga23-Sep-09 23:48

pbalaga

23-Sep-09 23:48

Well, I'd say the same until now. But I've got VC# 2008 (Express) for that, so it's rather not the case.

Re: How to dynamically use C# 3.5 compiler

PIEBALDconsult24-Sep-09 4:35

PIEBALDconsult

24-Sep-09 4:35

That's C# 3.0[^]

Execute:
dir /b/s %SystemDrive%\windows\microsoft.net\framework\csc.exe

I get:

C:\>dir /s/b %SystemDrive%\windows\microsoft.net\framework\csc.exe
C:\windows\microsoft.net\framework\v1.1.4322\csc.exe
C:\windows\microsoft.net\framework\v2.0.50727\csc.exe
C:\windows\microsoft.net\framework\v3.5\csc.exe

The version of csc that comes with .net v3.5 implements C# 3.0.

CodeDom should be calling the latest installed version of the compiler.

Re: How to dynamically use C# 3.5 compiler

pbalaga24-Sep-09 7:06

pbalaga

24-Sep-09 7:06

Thanks for your answer.

PIEBALDconsult wrote:
CodeDom should be calling the latest installed version of the compiler.

It should but did not. Anyway I was given a working solution on another forum.

Dictionary<string, string> options = new Dictionary<string, string>() { { "CompilerVersion", "v3.5" } };
Microsoft.CSharp.CSharpCodeProvider cp = new Microsoft.CSharp.CSharpCodeProvider(options);

Obviously, instead of v3.5 you can specify any other supported version.

Re: How to dynamically use C# 3.5 compiler

PIEBALDconsult24-Sep-09 7:08

PIEBALDconsult

24-Sep-09 7:08

Huh, good to know.

How to make a Custom Textbox Controll caputure the Parent's clickEvent [modified]

Natural_Demon23-Sep-09 9:35

Natural_Demon

23-Sep-09 9:35

i would like to know to capture 'any' click event outside the custom TextBox control.
but not use lostfocus, mousehover, mouseout, etc, etc
i stumbled over this, afterr seeing this in other control from this page.
but they use it different.

kind regards

public partial class exTextBox : TextBox
{
protected exTextBox parent;
public exTextBox Parent
{
get { return parent; }
}

public exTextBox()
{
InitializeComponent();
TextBoxParent(this.parent);
}

public void TextBoxParent(exTextBox parent)
{
parent.Click += new EventHandler(parent_Click);
}

void parent_Click(object sender, EventArgs e)
{
MessageBox.Show("click", "click", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}

--------------------------------------------------------------
errro: Object reference not set to an instance of an object.

public exTextBox()
{
this.Parent.Click +=new EventHandler(parent_Click);
}

void parent_Click(object sender, EventArgs e)
{
MessageBox.Show("click", "click", MessageBoxButtons.OK, MessageBoxIcon.Information);
}

Bad = knowing 2 much

modified on Wednesday, September 23, 2009 3:46 PM

Re: How to make a Custom Textbox Controll caputure the Parent's clickEvent

DaveyM6923-Sep-09 10:20

DaveyM69

23-Sep-09 10:20

The Parent property isn't set until the handle for the control is created AFAIK.

Try creating the event handler in an overrided OnHandleCreated method. This works for me.

using System;
using System.Windows.Forms;

namespace TestApp
{
    public partial class Form1 : Form
    {
        ExtendedTextBox extendedTextBox1;

        public Form1()
        {
            InitializeComponent();
            extendedTextBox1 = new ExtendedTextBox();
            Controls.Add(extendedTextBox1);
        }
    }

    public class ExtendedTextBox : TextBox
    {
        public ExtendedTextBox()
        {
        }

        protected override void OnHandleCreated(EventArgs e)
        {
            base.OnHandleCreated(e);
            Parent.Click += new EventHandler(Parent_Click);
        }

        void Parent_Click(object sender, EventArgs e)
        {
            MessageBox.Show(
                "click",
                "click",
                MessageBoxButtons.OK,
                MessageBoxIcon.Information);

        }
    }
}

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: How to make a Custom Textbox Controll caputure the Parent's clickEvent

Natural_Demon23-Sep-09 10:47

Natural_Demon

23-Sep-09 10:47

hey, thanx

indeed, i copy this to a new project, it works fine.
but when i copy the following lines to my old project,it's doesn't.

protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
Parent.Click += new EventHandler(Parent_Click);
}

void Parent_Click(object sender, EventArgs e)
{
MessageBox.Show(
"click",
"click",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}

the extended Textbox class gets compiled to dll.

Bad = knowing 2 much

Re: How to make a Custom Textbox Controll caputure the Parent's clickEvent

Natural_Demon23-Sep-09 11:12

Natural_Demon

23-Sep-09 11:12

this is the whole class

somehow 'SendMessage(...)' blocks it.
move the 'MessageBox' 2 lines higher @ 'protected override void OnHandleCreated' and it gets triggered.
put it baack below and it doesn't

public partial class exTextBox : TextBox
{
public exTextBox()
{
SendMessage(this.Handle, EM_SETCUEBANNER, 0, this.WaterMarkText);
}

protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
//this.Parent.Click +=new EventHandler(Parent_Click);
Parent.Click += new EventHandler(Parent_Click);
// just for testing
MessageBox.Show(
"OnHandleCreated",
"OnHandleCreated",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}

void Parent_Click(object sender, EventArgs e)
{
MessageBox.Show(
"click",
"click",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}

#region Attributes

//[DefaultValue(typeof(String), "set the default value"), Category("Appearance"), Description("Set the default value.")]

private const int EM_SETCUEBANNER = 0x1501;

[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern Int32 SendMessage
(IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam);

private string _waterMarkText = "Water Mark";
public string WaterMarkText
{
get { return _waterMarkText; }
set
{
SendMessage(this.Handle, EM_SETCUEBANNER, 0, value);
_waterMarkText = value;
Invalidate();
}
}
#endregion

public bool notempty()
{
if ((this.TextLength > 0) && (this.Text != this.WaterMarkText))
{
base.BackColor = Color.White;
return true;
}
else
{
base.BackColor = Color.Red;
this.Text = this.WaterMarkText;
return false;
}
}
}

Bad = knowing 2 much

How to display Multiple images in crystal report

me_ariharan23-Sep-09 8:49

me_ariharan

23-Sep-09 8:49

HI all,
I am trying to create a crystal report to display some images..
But i need to display more than one image in a single page.. The number of images to be display per page will be given dynamically. Sleepy | :zzz:

Re: How to display Multiple images in crystal report

Abhishek Sur23-Sep-09 10:35

Abhishek Sur

23-Sep-09 10:35

Are you talking about Resampling an image in your report based on Parameter value???
I dont know if Crystal Report has this functionality.

Why dont you do resampling in C# and then send those to Crystal Report ?? D'Oh! | :doh:

Abhishek Sur

My Latest Articles
Create CLR objects in SQL Server 2005
C# Uncommon Keywords
Read/Write Excel using OleDB
Don't forget to click "Good Answer" if you like to.

Error when opening demo projects

Stieven23-Sep-09 8:26

Stieven

23-Sep-09 8:26

Hi all,

I do a lot of searching on CodeProject and other websites. Sometimes I download a demo project or sourcefiles to see the code and try to understand it...
I have a lot an error when I want to open such a demo:
"The application for project 'filepath\projectname.csproj is not installed. Make sure the application for the projectype (.csproj) is installed."

Does anyone knows how to solve this? I
Hope that anybody can explain me the reason and solution why it won't open...

Thx!

Re: Error when opening demo projects

Luc Pattyn23-Sep-09 10:13

Luc Pattyn

23-Sep-09 10:13

Hi,

there are lots of programming languages and development environments around. However most CP articles are based on Visual Studio, which exists in different flavors. The professional or team versions can open project and solution files for C, C++, C++/CLI, C# and VB.NET; the express versions are language-specific and free, so you may have to install a couple of them.

Smile | :)

Luc Pattyn

Local announcement (Antwerp region): Lange Wapper? Neen!

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