方法一：

SaveFileDialog dlg = new SaveFileDialog();
dlg.Filter = "Execl files (*.xls)|*.xls";
dlg.FilterIndex = 0;
dlg.RestoreDirectory = true;
dlg.CreatePrompt = true;
dlg.Title = "保存为Excel文件";
dlg.FileName = "不合格记录";//保存的Excel名字
if (dlg.ShowDialog() == DialogResult.OK)
{Stream myStream;myStream = dlg.OpenFile();StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));string columnTitle = "";try{//写入列标题  for (int i = 0; i < dgv.ColumnCount; i++){if (i > 0){columnTitle += "\t";}columnTitle += dgv.Columns[i].HeaderText;}sw.WriteLine(columnTitle);//写入列内容  for (int j = 0; j < dgv.Rows.Count; j++){string columnValue = "";for (int k = 0; k < dgv.Columns.Count; k++){if (k > 0){columnValue += "\t";}if (dgv.Rows[j].Cells[k].Value == null)columnValue += "";elsecolumnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();}sw.WriteLine(columnValue);}sw.Close();myStream.Close();}catch (Exception e){MessageBox.Show(e.ToString());}finally{sw.Close();myStream.Close();}
}

方法二：包含图片

Microsoft.Office.Interop.Excel.Application Myexcel = new Microsoft.Office.Interop.Excel.Application();if (Myexcel == null){return;}Microsoft.Office.Interop.Excel._Workbook xBk;xBk = Myexcel.Application.Workbooks.Add(true);Microsoft.Office.Interop.Excel._Worksheet xSt;xSt = (Microsoft.Office.Interop.Excel._Worksheet)xBk.ActiveSheet;//设置标题等 string Title = null;Title = DateTime.Now.ToLongDateString() + "报价表";xSt.Name = Title;//报表的格式设置 //xSt.Cells[1, 6] = Title;// xSt.get_Range(Myexcel.Cells[1, 6], Myexcel.Cells[1, 6]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐 // xSt.get_Range(Myexcel.Cells[1, 6], Myexcel.Cells[1, 6]).Font.Bold = true;//xSt.get_Range(Myexcel.Cells[1, 6], Myexcel.Cells[1, 6]).Font.Size = 20;xSt.Cells[1, 1] = "品号";xSt.Cells[1, 2] = "品名";xSt.Cells[1, 3] = "客户品号";xSt.Cells[1, 4] = "图片";xSt.Cells[1, 5] = "客户编码";xSt.Cells[1, 6] = "客户名称";xSt.Cells[1, 7] = "数量";xSt.Cells[1, 8] = "币种";xSt.Cells[1, 9] = "汇率";xSt.Cells[1, 10] = "原币单价";xSt.Cells[1, 11] = "原币总价";xSt.Cells[1, 12] = "本币单价";xSt.Cells[1, 13] = "本币总价";xSt.Cells[1, 14] = "创建时间";//下面是用循环把datagridview中的内容写到excelfor (int rowIndex = 0; rowIndex < this.dgvQuotation.Rows.Count; rowIndex++){int colIndex = 0;for (colIndex = 1; colIndex <= dgvQuotation.ColumnCount; colIndex++){String value = null;if (dgvQuotation.Rows[rowIndex].Cells[colIndex - 1].Value != null){value = dgvQuotation.Rows[rowIndex].Cells[colIndex - 1].Value.ToString();if (dgvQuotation.Columns[colIndex - 1].Name == "图片") //处理{Image img;//如果是二进制形式://MemoryStream ms = new MemoryStream((byte[])dgvQuotation.Rows[rowIndex].Cells[colIndex - 1].Value);if (File.Exists(@"D:\产品图片\" + dgvQuotation.Rows[rowIndex].Cells[0].Value.ToString() + ".jpg")){//需要判断是否存在图片img = Image.FromFile(@"D:\产品图片\" + dgvQuotation.Rows[rowIndex].Cells[0].Value.ToString() + ".jpg");//双引号里是图片的路径}else{//需要判断是否存在图片img = Image.FromFile(@"D:\产品图片\LOGO.jpg");//双引号里是图片的路径}//Image img = Image.FromStream(ms);//路径// Image img = GetImage(value);string tmpName = tmpPath + "\\temp" + rowIndex + ".bmp";img.Save(tmpName);string cellAddr = (GetAddress(rowIndex + 4, colIndex));Microsoft.Office.Interop.Excel.Range range = (Microsoft.Office.Interop.Excel.Range)xSt.get_Range(cellAddr, Type.Missing);float left = float.Parse(range.Left.ToString());float top = float.Parse(range.Top.ToString());float width = float.Parse(range.Width.ToString());float height = float.Parse(range.Height.ToString());xSt.Shapes.AddPicture(tmpName, MsoTriState.msoFalse, MsoTriState.msoTrue, left, top, width, height);//xSt.Shapes.AddPicture(tmpName, MsoTriState.msoFalse, MsoTriState.msoTrue, left, top, 200, 200);continue;}}xSt.Cells[rowIndex + 4, colIndex] = value;}}//后台处理 //用户无法看到Myexcel.Visible = false;//允许打开对话框保存文件Myexcel.DisplayAlerts = true;// xBk.Close(true, "D:\\1.xls", null);xSt = null;xBk = null;Myexcel.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(Myexcel);Myexcel = null;