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The FileNameEditor class lets you provide your users with a standard open file dialog box or save file dialog box from the CodeSmith property grid. To use this class, you must include a reference to the CodeSmith.CustomProperties assembly in your template. You'll make the code simpler if you import the namespace as well:

<%@ Assembly Name="CodeSmith.CustomProperties" %>
<%@ Import Namespace="CodeSmith.CustomProperties" %>
After you include the appropriate assembly reference, you can define a property in a script block that uses the FileNameEditor:

<script runat="template">
private string \_userFileName = @"c:\temp\test.txt";
\[Editor(typeof(FileNameEditor), typeof(System.Drawing.Design.UITypeEditor)),
Category("Custom"), Description("User selected file.")\]
public string UserFileName
{
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;get {return \_userFileName;}
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;set {_userFileName= value;}
}
</script>

When the user executes the template, the specified property will display a builder button on the property sheet:

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Clicking the builder button will open the specified file dialog box:

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You can customize the appearance of the file dialog box by applying the FileDialogAttribute to the property. For example, consider this property definition:

private string \_openFileName = @"c:\temp\test.txt";
\[Editor(typeof(FileNameEditor), typeof(System.Drawing.Design.UITypeEditor)),
FileDialogAttribute(FileDialogType.Open, Title="Select Input File"),
Category("Custom"), Description("User selected file.")\]
public string OpenFileName
{
      get {return \_openFileName;}
      set {_openFileName= value;}
}

The resulting file dialog box looks like this:

You can specify these properties in the FileDialogAttribute:

<%@ Assembly Name="System.Design" %>\\
 <script runat="template">\\
 private string \_outputDirectory = @"c:\temp";\\
 \[Editor(typeof(System.Windows.Forms.Design.FolderNameEditor), typeof(System.Drawing.Design.UITypeEditor)),\\
 Category("Custom"), Description("Output directory.")\]\\
 public string OutputDirectory\\
 {\\
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; get {return \_outputDirectory;}\\
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; set {_outputDirectory= value;}\\
 }\\
 </script>