public void SaveExcel() { string fileSource = @"c:1.xls"; //源文件 using (SaveFileDialog saveFileDialog1 = new SaveFileDialog()) { saveFileDialog1.Title = "另存为"; saveFileDialog1.FileName = "newExcelName.xls"; //设置默认另存为的名字,可选 saveFileDialog1.Filter = "Excel 文件(*.xls)|*.xls|Excel 文件(*.xlsx)|*.xlsx|所有文件(*.*)|*.*"; saveFileDialog1.AddExtension = true; if (saveFileDialog1.ShowDialog() == DialogResult.OK) { System.IO.File.Copy(fileSource, saveFileDialog1.FileName, true); } } }