Save file with appropriate extension in a Save File prompt

Question

In my application I use a SaveFileDialog to pop up a Save As window. I have restricted in the file type section the file to be saved as .dat with the following code.

sfdialog.Filter = "Data Files (*.dat*)|*.dat*";

What I want to know how to do is make it automatically save with the .dat extension. Currently it just saves with no extension unless I specifically save it as filename.dat.

score 68 · Accepted Answer · edited Mar 09 '16 at 12:28

68

SaveFileDialog dlg = new SaveFileDialog();
dlg.Filter = "Data Files (*.dat)|*.dat";
dlg.DefaultExt = "dat";
dlg.AddExtension = true;

edited Mar 09 '16 at 12:28

Tomas Kubes

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answered Jul 31 '09 at 15:53

Francis B.

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score 6 · Answer 2 · edited Dec 03 '19 at 18:22

6

The AddExtension and DefaultExt properties. For example:

sfdialog.DefaultExt = "dat";
sfdialog.AddExtension = true;

edited Dec 03 '19 at 18:22

Number70

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answered Jul 31 '09 at 15:53

John Calsbeek

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It's important to note that `DefaultExt` is required, setting just the `Filter` and `AddExtension` is not enough by itself, which I found strange. – Tyrrrz Nov 14 '18 at 09:01

Save file with appropriate extension in a Save File prompt

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