C# 在“保存文件”提示中使用适当的扩展名保存文件
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Save file with appropriate extension in a Save File prompt
提问by novacara
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.
在我的应用程序中，我使用 SaveFileDialog 弹出一个另存为窗口。我在文件类型部分限制了使用以下代码保存为 .dat 的文件。
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.
我想知道怎么做是让它自动以 .dat 扩展名保存。目前它只是不带扩展名保存，除非我专门将它保存为 filename.dat。
采纳答案by Francis B.
SaveFileDialog dlg = new SaveFileDialog();
dlg.Filter = "Data Files (*.dat)|*.dat";
dlg.DefaultExt = "dat";
dlg.AddExtension = true;
回答by John Calsbeek
The AddExtensionand DefaultExtproperties. For example:
该AddExtension和DefaultExt性能。例如：
sfdialog.DefaultExt = "dat";
sfdialog.AddExtension = true;
