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POproblem with Associate file type in my program
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  1. POproblem with Associate file type in my program
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    copied!<p>i have this code for Associate *.sdf files to my C# program:</p> <pre><code> public class FileAssociation { // Associate file extension with progID, description, icon and application public static void Associate(string extension, string progID, string description, string icon, string application) { Registry.ClassesRoot.CreateSubKey(extension).SetValue("", progID); if (progID != null &amp;&amp; progID.Length &gt; 0) using (RegistryKey key = Registry.ClassesRoot.CreateSubKey(progID)) { if (description != null) key.SetValue("", description); if (icon != null) key.CreateSubKey("DefaultIcon").SetValue("", ToShortPathName(icon)); if (application != null) key.CreateSubKey(@"Shell\Open\Command").SetValue("", ToShortPathName(application) + " \"%1\""); } } // Return true if extension already associated in registry public static bool IsAssociated(string extension) { return (Registry.ClassesRoot.OpenSubKey(extension, false) != null); } [DllImport("Kernel32.dll")] private static extern uint GetShortPathName(string lpszLongPath, [Out] StringBuilder lpszShortPath, uint cchBuffer); // Return short path format of a file name private static string ToShortPathName(string longName) { StringBuilder s = new StringBuilder(1000); uint iSize = (uint)s.Capacity; uint iRet = GetShortPathName(longName, s, iSize); return s.ToString(); } } </code></pre> <p>and i use it like this:</p> <pre><code> if (!FileAssociation.IsAssociated(".sdf")) FileAssociation.Associate(".sdf", "ClassID.ProgID", "sdf File", @"d:\ICO.ico", @"D:\OpenSDF.exe"); </code></pre> <p>i try this too:</p> <pre><code> if (FileAssociation.IsAssociated(".sdf")) FileAssociation.Associate(".sdf", "ClassID.ProgID", "sdf File", @"d:\ICO.ico", @"D:\OpenSDF.exe"); </code></pre> <p>my problem is when the file Already associated with another program it wont work !</p> <p>for example: the <code>*.sdf</code> files on my computer Associate to open with <code>Visual-studio 2008</code></p> <p>i run this code - <strong>and Nothing happens !!</strong></p> <p>what i can do ?</p> <p>thanks in advance</p>
 

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