FileDialog.Filter Property
Assembly: System.Windows.Forms (in system.windows.forms.dll)
[LocalizableAttribute(true)] public: property String^ Filter { String^ get (); void set (String^ value); }
/** @property */ public String get_Filter () /** @property */ public void set_Filter (String value)
public function get Filter () : String public function set Filter (value : String)
Property Value
The file filtering options available in the dialog box.For each filtering option, the filter string contains a description of the filter, followed by the vertical bar (|) and the filter pattern. The strings for different filtering options are separated by the vertical bar.
The following is an example of a filter string: "Text files (*.txt)|*.txt|All files (*.*)|*.*"
You can add several filter patterns to a filter by separating the file types with semicolons, for example, "Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*"
Use the FilterIndex property to set which filtering option is shown first to the user.
The following code example uses the OpenFileDialog implementation of FileDialog and illustrates creating, setting of properties, and showing the dialog box. The example uses the Filter and FilterIndex properties to provide a list of filters for the user. The example requires a form with a Button placed on it and the System.IO namespace added to it.
private: void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ ) { Stream^ myStream; OpenFileDialog^ openFileDialog1 = gcnew OpenFileDialog; openFileDialog1->InitialDirectory = "c:\\"; openFileDialog1->Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"; openFileDialog1->FilterIndex = 2; openFileDialog1->RestoreDirectory = true; if ( openFileDialog1->ShowDialog() == ::DialogResult::OK ) { if ( (myStream = openFileDialog1->OpenFile()) != nullptr ) { // Insert code to read the stream here. myStream->Close(); } } }
protected void button1_Click(Object sender, System.EventArgs e)
{
Stream myStream;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.set_InitialDirectory("c:\\");
openFileDialog1.set_Filter(
"txt files (*.txt)|*.txt|All files (*.*)|*.*");
openFileDialog1.set_FilterIndex(2);
openFileDialog1.set_RestoreDirectory(true);
if (openFileDialog1.ShowDialog().Equals(get_DialogResult().OK)) {
if ((myStream = openFileDialog1.OpenFile()) != null) {
// Insert code to read the stream here.
myStream.Close();
}
}
} //button1_Click
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.