Hi DaMehio,

We can use command to call a rar program to achieve your goal. We can use Process.Start to execute a command in C#. This is a code snippet shows how to call winrar to package or extract files:

//Rar path
private const string RAR_PATH = @"C:\Program Files (x86)\WinRAR\WinRAR.exe";
//Package files.
private void RarFiles(string rarPackagePath, List<string> files)
{
    for(int i = 0; i < files.Count; i++)
    {
        files[0] = string.Format("\"{0}\"", files[i]);
    }
    string fileList = string.Join(" ", files.ToArray());
    string cmdArgs = string.Format("A {0} {1}",
        String.Format("\"{0}\"", rarPackagePath),
        fileList);
    Process.Start(String.Format("\"{0}\"", RAR_PATH), cmdArgs);
}
//Extract files.
private void UnrarFiles(string rarPackagePath, string dir)
{
    string cmdArgs = string.Format("X {0} * {1}",
        String.Format("\"{0}\"", rarPackagePath),
        String.Format("\"{0}\"", dir));
    Process.Start(String.Format("\"{0}\"", RAR_PATH), cmdArgs);
}

You can get more support about winrar from:
http://www.win-rar.com/winrarsupport.html.

Let me know if this helps.
Aland Li

This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control these sites and has not tested any software or information found on these sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet.

Hi DaMehio,

These are my replies:

1. This is the path of the winrar program on my machine. My operation system is 64-bit, so it adds “x86�because the winrar program is 32-bit. On your machine, it may be different, so you need to replace this string to the winrar program path on your machine.

2. Yes, you are right. I am sorry for the mistake. I have correct it.

3. The command I show is to package some files. The code can be like below:
List<string> files = new List<string>();
files.Add(@"C:\my\test1.txt");
files.Add(@"C:\my\test2.txt");
files.Add(@"C:\my\test3.txt");
RarFiles(@"C:\my\test.rar", files);
If you would like to add all the files in a directory, the code can be like bellow:
List<string> files = new List<string>();
files.AddRange(System.IO.Directory.GetFiles(@"C:\my\test.rar"));
RarFiles(@"C:\my\test.rar", files);
If you would like to add a whole directory to a package, you need to change to another command. You can find related command via the link I provided in my last reply.

Let me know if this helps.
Aland Li

Hi DaMehio,

We can use command to call a rar program to achieve your goal. We can use Process.Start to execute a command in C#. This is a code snippet shows how to call winrar to package or extract files:

//Rar path
private const string RAR_PATH = @"C:\Program Files (x86)\WinRAR\WinRAR.exe";
//Package files.
private void RarFiles(string rarPackagePath, List<string> files)
{
    for(int i = 0; i < files.Count; i++)
    {
        files[0] = string.Format("\"{0}\"", files[i]);
    }
    string fileList = string.Join(" ", files.ToArray());
    string cmdArgs = string.Format("A {0} {1}",
        String.Format("\"{0}\"", rarPackagePath),
        fileList);
    Process.Start(String.Format("\"{0}\"", RAR_PATH), cmdArgs);
}
//Extract files.
private void UnrarFiles(string rarPackagePath, string dir)
{
    string cmdArgs = string.Format("X {0} * {1}",
        String.Format("\"{0}\"", rarPackagePath),
        String.Format("\"{0}\"", dir));
    Process.Start(String.Format("\"{0}\"", RAR_PATH), cmdArgs);
}

You can get more support about winrar from:
http://www.win-rar.com/winrarsupport.html.

Let me know if this helps.
Aland Li

This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control these sites and has not tested any software or information found on these sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet.

Hi DaMehio,

These are my replies:

1. This is the path of the winrar program on my machine. My operation system is 64-bit, so it adds “x86�because the winrar program is 32-bit. On your machine, it may be different, so you need to replace this string to the winrar program path on your machine.

2. Yes, you are right. I am sorry for the mistake. I have correct it.

3. The command I show is to package some files. The code can be like below:
List<string> files = new List<string>();
files.Add(@"C:\my\test1.txt");
files.Add(@"C:\my\test2.txt");
files.Add(@"C:\my\test3.txt");
RarFiles(@"C:\my\test.rar", files);
If you would like to add all the files in a directory, the code can be like bellow:
List<string> files = new List<string>();
files.AddRange(System.IO.Directory.GetFiles(@"C:\my\test.rar"));
RarFiles(@"C:\my\test.rar", files);
If you would like to add a whole directory to a package, you need to change to another command. You can find related command via the link I provided in my last reply.

Let me know if this helps.
Aland Li

string.Format("\"{0}\"", files[i]);

thanks again