如何在SaveFileDialog中的默认FileName中设置长字符串(> 260)？

saveFileDialog.FileName = @"\\?\C:\path\to\your\file\with\long\name.txt";

saveFileDialog.FileName = @"\\yourserver\share\path\to\your\file\with\long\name.txt";

public void SetFileDialogFileName(SaveFileDialog saveFileDialog, string fileName)
{
    int MAX_PATH = 260;
    int fileNameLength = fileName.Length;

    if (fileNameLength <= MAX_PATH)
    {
        saveFileDialog.FileName = fileName;
        return;
    }

    string fileNameWithoutPath = Path.GetFileName(fileName);
    string directoryPath = fileName.Substring(0, fileNameLength - fileNameWithoutPath.Length);

    saveFileDialog.FileName = fileNameWithoutPath;
    saveFileDialog.InitialDirectory = directoryPath;
}

string longFileName = @"C:\path\to\your\file\with\long\name.txt";
SetFileDialogFileName(saveFileDialog, longFileName);