How to set Default File name in Save Dialogue box in silverlight 4

How to set Default File name in Save Dialogue box in silverlight 4

Hi,

I am using Silverligt 4 application. When I export by default file name should display in the save dialogue box. Please give me a c# code to achieve this in Silverlight 4 application. This is very high priority else give me alternate solution to achive in Silverlight 4 application.

Regards,

Santosh

Answers & Comments...

Answer: 1

That feature was added to the SaveFileDialog control in silverlight 5.  Here is a possible work around for silverlight 4 (I did not test):

http://stackoverflow.com/questions/8316799/silverlight-savefiledialog-set-default-file-name

Answer: 2

http://msdn.microsoft.com/en-us/library/system.windows.controls.savefiledialog%28v=vs.95%29.aspx

http://forums.silverlight.net/t/117702.aspx

Answer: 3

hi santoshhegde

private void nmrButton_Click(object sender, RoutedEventArgs e)
{
SaveFileDialog dialog = new SaveFileDialog();
dialog.GetType().GetMethod("set_DefaultFileName").Invoke(dialog, new object[] { "FileName.ext" });
dialog.ShowDialog();
}

Thanks & Regards
Mastan Narravula
Mark as Answer", if it helped you or it might help others too.

Answer: 4

Hi,

This I tried I am getting object refernce not set to an instance of an object error.

Regards,

Santosh

Answer: 5

hi 

can u tell which item is getting null here...

Answer: 6

I have done like this:

SaveFileDialog objSFD = new SaveFileDialog() {
DefaultExt = "csv",
Filter = "CSV Files (*.csv)|*.csv|Excel XML (*.xml)|*.xml|All files (*.*)|*.*",
FilterIndex = 1
};

string item = TextBox.Text;

objSFD.GetType().GetMethod(item).Invoke(objSFD, new object[] { item });

Here item will contain text box value that value I want to keep as SaveDialogueBox default file name. Let me know  where I am doing wrong.

Regards,

Santosh

Answer: 7

hi santoshhegde keep this and try

objSFD.GetType().GetMethod("set_DefaultFileName").Invoke(objSFD, new object[] { "Mastan" });

Thanks & Regards
Mastan Narravula
Mark as Answer", if it helped you or it might help others too.

Answer: 8

Hi,

With that also I am getting same error : Object reference not set to an instance of an object.

Answer: 9

hi try this

private void nmrButton_Click(object sender, RoutedEventArgs e)
{
TextBox tb = new TextBox();
tb.Text = "NMR";

SaveFileDialog objSFD = new SaveFileDialog()
{
DefaultExt = "csv",
Filter = "CSV Files (*.csv)|*.csv|Excel XML (*.xml)|*.xml|All files (*.*)|*.*",
FilterIndex = 1
};

string item = tb.Text;

objSFD.GetType().GetMethod("set_DefaultFileName").Invoke(objSFD, new object[] { item.ToString() });
objSFD.ShowDialog();
}

Thanks & Regards 
Mastan Narravula
Mark as Answer", if it helped you or it might help others too.

Answer: 10

Hi Mastan,

No luck still I am getting same error.

Answer: 11

Hi,

I tried above one no luck still getting same issue.

Answer: 12

Hi Mastan,

 objSFD.GetType().GetMethod("set_DefaultFileName")   -> this part of the line is coming null. Any solution why?

Regards,

Santosh

Answer: 13

Hi Santosh,

I am following the solution Mastan Narra... provides, it works for me. So please check your code again. Below is my test code:

            SaveFileDialog objSFD = new SaveFileDialog()              {                  DefaultExt = "csv",                  Filter = "CSV Files (*.csv)|*.csv|Excel XML (*.xml)|*.xml|All files (*.*)|*.*",                  FilterIndex = 1              };              objSFD.GetType().GetMethod("set_DefaultFileName").Invoke(objSFD, new object[] { "untitled.txt" });              if (objSFD.ShowDialog() == true)              {                  System.IO.Stream fileStream = objSFD.OpenFile();                  System.IO.StreamWriter sw = new System.IO.StreamWriter(fileStream);                  sw.WriteLine("Writing some text in the file.");                  sw.Flush();                  sw.Close();              }  

Please let me know if you have any question. If the issue still exists, please share your code or project (remove unrelated and sensitive code first) so that I can help you further.
Best Regards,

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