CODEWITHSUNDEEP
silverlight-4.0
Anil
Anil

Reputation: 37

Unable to open openfileDialog in silverlight

I want to use openfiledialog to upload file,but when I write following code Security exception is fired that is "Dialogs must be user-initiated."

btn_click()
{
  OpenFileDialog fileDialog=new OpenFileDialog();            
  fileDialog.Multiselect = false;
  fileDialog.Filter = "All Files|*.*";
  bool? retval = fileDialog.ShowDialog();   
  if (fileDialog.ShowDialog()==false){ 
    Stream strm = fileDialog.File.OpenRead();
    byte[] Buffer = new byte[strm.Length];
    strm.Read(Buffer, 0, (int)strm.Length);
    strm.Dispose();
    strm.Close();
    Uploadfile file=new Uploadfile(); 
    file.FileName = fileDialog.File.Name;
    file.File = Buffer; 
    po.fileUploadAsync(file);
  }

Upvotes: 1

Views: 989

Answers (2)

Abhi
Abhi

Reputation: 5561

OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "Text Files (*.txt)|*.txt";

if (dlg.ShowDialog() == DialogResult.OK){ 

   using (StreamReader reader = dlg.SelectedFile.OpenText())   
     // Store file content in 'text' variable      
  string text = reader.ReadToEnd();   
 }

}

Upvotes: 0

ChrisF
ChrisF

Reputation: 137148

As the exception you're getting states the open file dialog can only be activated from a user initiated action when the application is run in the browser and with restricted trust.

What are you trying to achieve?

The simplest solution is to add a button to your UI that allows the user to control when this process happens.

Upvotes: 1

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