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SaveFileDialog.OpenFile Method

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Opens the file with read/write permission selected by the user.

public:
 System::IO::Stream ^ OpenFile();
public System.IO.Stream OpenFile ();
member this.OpenFile : unit -> System.IO.Stream
Public Function OpenFile () As Stream

Returns

Stream

The read/write file selected by the user.

Examples

The following code example illustrates creating a SaveFileDialog, setting members, calling the dialog box using the ShowDialog method, and opening the selected file. The example requires a form with a button placed on it.

private:
   void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      Stream^ myStream;
      SaveFileDialog^ saveFileDialog1 = gcnew SaveFileDialog;
      saveFileDialog1->Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
      saveFileDialog1->FilterIndex = 2;
      saveFileDialog1->RestoreDirectory = true;
      if ( saveFileDialog1->ShowDialog() == ::DialogResult::OK )
      {
         if ( (myStream = saveFileDialog1->OpenFile()) != nullptr )
         {
            
            // Code to write the stream goes here.
            myStream->Close();
         }
      }
   }

private void button1_Click(object sender, System.EventArgs e)
 {
     Stream myStream ;
     SaveFileDialog saveFileDialog1 = new SaveFileDialog();
 
     saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"  ;
     saveFileDialog1.FilterIndex = 2 ;
     saveFileDialog1.RestoreDirectory = true ;
 
     if(saveFileDialog1.ShowDialog() == DialogResult.OK)
     {
         if((myStream = saveFileDialog1.OpenFile()) != null)
         {
             // Code to write the stream goes here.
             myStream.Close();
         }
     }
 }

Private Sub button1_Click(sender As Object, e As System.EventArgs)
    Dim myStream As Stream
    Dim saveFileDialog1 As New SaveFileDialog()
    
    saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"
    saveFileDialog1.FilterIndex = 2
    saveFileDialog1.RestoreDirectory = True
    
    If saveFileDialog1.ShowDialog() = DialogResult.OK Then
        myStream = saveFileDialog1.OpenFile()
        If (myStream IsNot Nothing) Then
            ' Code to write the stream goes here.
            myStream.Close()
        End If
    End If
End Sub

Remarks

Caution

For security purposes, this method creates a new file with the selected name and opens it with read/write permissions. This can cause unintentional loss of data if you select an existing file to save to. To save data to an existing file while retaining existing data, use the File class to open the file using the file name returned in the FileName property.

Applies to

See also