private static string AssocQueryString(ApplicationAssociation association)
{
uint appNameLength = 0;
var result = WindowsApi.AssocQueryString(WindowsApi.AssocF.None, WindowsApi.AssocStr.FriendlyAppName, association.ProgId, null, null, ref appNameLength);
if (new[] { 2147943555, 2147942402 }.Contains(result)) // No application is associated with the specified file for this operation OR The system cannot find the file specified
{
return(null);
}
if (result != 1)
{
throw new Win32Exception((int)result);
}
var buffer = new StringBuilder((int)appNameLength);
var bufferLength = (uint)buffer.Capacity;
result = WindowsApi.AssocQueryString(WindowsApi.AssocF.None, WindowsApi.AssocStr.FriendlyAppName, association.ProgId, null, buffer, ref bufferLength);
if (result != 0)
{
throw new Win32Exception((int)result);
}
return(buffer.ToString());
}
private void btnDoFileAssociate_Click(object sender, EventArgs e)
{
try
{
using (FileAssociationManager mgr = new FileAssociationManager())
{
foreach (object item in cListBoxFileExtension.CheckedItems)
{
using (ApplicationAssociation ext = mgr.RegisterFileAssociation(item.ToString()))
{
ext.DefaultIcon = new ApplicationIcon(Application.ExecutablePath);
ext.ShellOpenCommand = Application.ExecutablePath;
ext.Associated = true;
}
}
}
this.ShowMessage("已关联文件");
}
catch (Exception ex)
{
this.ShowMessage(ex.Message);
}
}
