public FileDialog EnforceExt(params string[] Ext)
{
if (events.HasFlag(ExistingEvents.Extension))
{
throw new Exception("Enforced extensions can only be set once.");
}
events |= ExistingEvents.Extension;
fileDialog.FileOk += delegate(object sender, CancelEventArgs e)
{
bool test = false;
foreach (string ext in Ext)
{
test = test ? test : ((OpenFileDialog)sender).FileName.EndsWith(ext);
}
if (!test)
{
MessageBox.Show("Please select a filename with " + (Ext.Count() == 1 ? "the extension " : "one of the following extensions: ") + String.Join(" ", Ext), "Incorrect File Extension");
e.Cancel = true;
}
};
return(this);
}
