使用可视C#写入其他程序的“另存为”对话框

using System;
using System.Runtime.InteropServices;

namespace SaveFileDialogExample
{
    class Program
    {
        // 导入Windows API函数
        [DllImport("Comdlg32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern bool GetSaveFileName(ref OPENFILENAME lpofn);

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public struct OPENFILENAME
        {
            public int lStructSize;
            public IntPtr hwndOwner;
            public IntPtr hInstance;
            public string lpstrFilter;
            public string lpstrCustomFilter;
            public int nMaxCustFilter;
            public int nFilterIndex;
            public string lpstrFile;
            public int nMaxFile;
            public string lpstrFileTitle;
            public int nMaxFileTitle;
            public string lpstrInitialDir;
            public string lpstrTitle;
            public int Flags;
            public short nFileOffset;
            public short nFileExtension;
            public string lpstrDefExt;
            public IntPtr lCustData;
            public IntPtr lpfnHook;
            public string lpTemplateName;
        }

        static void Main(string[] args)
        {
            // 初始化OPENFILENAME结构体
            OPENFILENAME ofn = new OPENFILENAME();
            ofn.lStructSize = Marshal.SizeOf(ofn);
            ofn.lpstrFilter = "Text Files (*.txt)\0*.txt\0All Files (*.*)\0*.*\0";
            ofn.lpstrFile = new string('\0', 260);
            ofn.nMaxFile = ofn.lpstrFile.Length;
            ofn.lpstrFileTitle = new string('\0', 260);
            ofn.nMaxFileTitle = ofn.lpstrFileTitle.Length;
            ofn.lpstrInitialDir = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
            ofn.lpstrTitle = "Save As";
            ofn.Flags = 0x00000002 | 0x00000800; // OFN_OVERWRITEPROMPT | OFN_PATHMUSTEXIST

            // 调用GetSaveFileName函数显示对话框
            if (GetSaveFileName(ref ofn))
            {
                string filePath = ofn.lpstrFile;
                Console.WriteLine("Selected file path: " + filePath);
            }
        }
    }
}