How to Easily Select Folders in C# Using the FolderBrowserDialog?

Use the OpenFileDialog control to select a folder

While you can use the GetOpenFileName function and OPENFILENAME structure to select folders, the OpenFileDialog control provides a simpler and easier-to-use method. This control provides a dedicated folder selection interface without the need to manage dialog templates.

Use FolderBrowserDialog class

To use OpenFileDialog to select folders, consider using the FolderBrowserDialog class. This class provides a user-friendly interface for browsing and selecting folders. The following code example demonstrates its usage:

using System.Windows.Forms;
using System.IO;

namespace FolderSelection {
    public class FolderSelect {
        public static void Main() {
            using (var fbd = new FolderBrowserDialog()) {
                DialogResult result = fbd.ShowDialog();

                if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath)) {
                    string[] files = Directory.GetFiles(fbd.SelectedPath);

                    MessageBox.Show("找到的文件数量: " + files.Length, "提示");
                }
            }
        }
    }
}

WPF application requirements

When using the FolderBrowserDialog class in a WPF application, remember to add the following reference:

• System.Windows.Forms Quote
• System.IO namespace (for Directory classes)

By using the FolderBrowserDialog class, developers can easily and efficiently select folders in C# applications.

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