Calling Javascript functino from your code behind in ASP.Net

Here is the code by which you can call a javascript function within any where of you C# code.

Page.ClientScript.RegisterStartupScript(Page.GetType(), "YourPrompt",
"<script>alert('Hello');</script>");

Hope it works.

Thanks
/Zaq

Zip/Unzip using C#

I have spent few hours over internet to find out a way to create zip file using .net 2.0, C#. My intention was to avoid any third party library or application. I started with System.IO.Compression, but I did not find any resource about creating a zip from a directory with files and subdirectory as well. I got few .net library and I felt few of those are quite familier and using wiedly. But as I have some restriction i can not use those. Finally I got a solutoin to create and extract zip file using Shell32.dll. Here is two functions I wrote.

private static void ZipFile(string sourceFolder, string destinationFile)
{
byte[] emptyzip = new byte[] { 80, 75, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

FileStream fs = File.Create(destinationFile);
fs.Write(emptyzip, 0, emptyzip.Length);
fs.Flush();
fs.Close();
fs = null;

//Copy a folder and its contents into the newly created zip file
Shell32.ShellClass sc = new Shell32.ShellClass();
Shell32.Folder SrcFlder = sc.NameSpace(sourceFolder);
Shell32.Folder DestFlder = sc.NameSpace(destinationFile);
Shell32.FolderItems items = SrcFlder.Items();
DestFlder.CopyHere(items, 20);
}


private static string UnzipFile(string inputFileName, string destinationPath)
{
if (!Directory.Exists(destinationPath))
Directory.CreateDirectory(destinationPath);

Shell shell = new ShellClass();
Folder sourceFolder = shell.NameSpace(inputFileName);
Folder destinationFolder = shell.NameSpace(destinationPath);
string outputFileName = sourceFolder.Items().Item(0).Name;
destinationFolder.CopyHere(sourceFolder.Items(), "");
return outputFileName;
}

Here is the code to call those function.

ZipFile(@"D:\SourceFolder", @"D:\MyZip.zip");

UnzipFile(@"D:\MyZip.zip", @"D:\ExtractFolder");

Hope this may help you. Thanks.

Execute Java jar file from .Net

Step1: Creating a Java Class

package ZAQ;

import javax.swing.JOptionPane;
public class Hello {
public static void main (String [] args) {
JOptionPane.showMessageDialog(null, "Hello World!");
}
}

Put this Class Inside ZAQ directory and set the class file name as Hello.java


Step2: Preparing of mainClass.txt file.
Write the following line in the file. Please remember to put a carriage return after the line.
Main-Class: ZAQ.Hello


Step3: Compile the Java Class and Build the jar file
Create class file for Hello.java and then build the jar file. Do the following commands
->Javac ZAQ/Hello.java
->jar cmf mainClass.txt ZAQ.jar ZAQ
->java –jar ZAQ.jar Hello
Now your jar is ready.


Step4: Create a batch file to be execute in .Net
Save a file with the following text:
java -jar D:\ZAQ.jar


Step5: .Net code is here.

int i = 0;
string sOut = ShellExec(@"d:\Comm.bat", "", "", out i);
Console.WriteLine(sOut);

And the function is here:

protected static String ShellExec(String cmd, String path, String parms, out int exit_code)
{
System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo(path + cmd, parms);
psi.RedirectStandardOutput = true;
psi.UseShellExecute = false;

System.Diagnostics.Process p = System.Diagnostics.Process.Start(psi);
string tool_output = p.StandardOutput.ReadToEnd();
p.WaitForExit();
exit_code = p.ExitCode;
return tool_output;
}