FileDialog.SupportMultiDottedExtensions Property
Gets or sets whether the dialog box supports displaying and saving files that have multiple file name extensions.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Property Value
Type: System.Booleantrue if the dialog box supports multiple file name extensions; otherwise, false. The default is false.
Sometimes users must open and save files that use multiple file name extensions. For example, the application manifest files used by the ClickOnce deployment technology end in the complex file name extension ".exe.manifest". Setting this property to true enables you to set the Filter property to a multi-dotted extension.
If SupportMultiDottedExtensions is false, and you assign a multi-dotted extension to Filter, derived controls such as SaveFileDialog will only use the last extension in the string. For example, ".manifest" will be used instead of ".exe.manifest".
The following code example saves files with the extension ".data.txt". This code example requires that your application host a SaveFileDialog named saveFileDialog1 and a Button named button1.
Imports System.IO Imports System.Text Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Me.SaveFileDialog1.SupportMultiDottedExtensions = True Me.SaveFileDialog1.Filter = "Data text files|*.data.txt" Me.SaveFileDialog1.ShowDialog() End Sub Private Sub SaveFileDialog1_FileOk(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles SaveFileDialog1.FileOk Try Dim MyFile As StreamWriter = New StreamWriter(Me.SaveFileDialog1.OpenFile(), Encoding.Unicode) MyFile.WriteLine("Hello, world!") MyFile.Close() Catch ex As Exception MessageBox.Show("Error: Could not write file. Please try again later. Error message: " & ex.Message, "Error Writing File", MessageBoxButtons.OK, MessageBoxIcon.Exclamation) End Try End Sub End Class
Available since 2.0