What You've AccomplishedFilePicker for WPF allows users to select multiple files at run time, though this option is not selected by default. At run time, users can only select one file at a time by default – you can allow users to select multiple files by setting the Multiselect property to True, for example see the steps below.
At Design Time
To set the Multiselect property at design time, complete the following steps:
1. Click the C1FilePicker control once to select it.
2. Navigate to the Properties window and locate the Multiselect item.
3. Check the check box next to the Multiselect item.
This will set the Multiselect property to allow users to select multiple files at run time in the OpenFileDialog dialog box.
In XAML
For example, to set the Multiselect property add Multiselect="True" to the <c1:C1FilePicker> tag so that it appears similar to the following:
<c1:C1FilePicker HorizontalAlignment="Left" Margin="112,36,0,0" Name="C1FilePicker1" VerticalAlignment="Top" Width="161" Multiselect="True" />
In Code
For example, to set the Multiselect property, add the following code to your project:
Me.C1FilePicker1.Multiselect = True
•C#
this.c1FilePicker1.Multiselect = true;
What You've Accomplished
You can now select multiple files using the C1FilePicker control. Run the application, select the Browse button in the C1FilePicker control, and observe that you can select multiple files in the dialog box that appears by clicking the CTRL key while choosing files.