C#WinForm 直接导出DataGridView数据到Excel表格的二种方法对比

方法一、利用微软的excel 操作类

 

引用：using Excel = Microsoft.Office.Interop.Excel;

 

代码如下:

        #region导出数据表：Excle (微软的excel 操作类)        ///<summary>        ///导出数据表：Excle        ///</summary>        ///<param name="myDGV"></param>        public void _ToExcel(DataGridView myDGV)        {            string path = "";            SaveFileDialog saveDialog = new SaveFileDialog();            saveDialog.DefaultExt = "xlsx";            saveDialog.Filter = "Excel文件|*.xlsx";            saveDialog.ShowDialog();            path = saveDialog.FileName;            if (path.IndexOf(":") < 0) return; //判断是否点击取消            try            {                Excel.Application xlApp = new Excel.Application();                if (xlApp == null)                {                    MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");                    return;                }                Excel.Workbooks workbooks = xlApp.Workbooks;                Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);                Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1                int colIndex = 0;                //写入标题                for (int i = 0; i < myDGV.ColumnCount; i++)                {                    if (myDGV.Columns[i].Visible)//用作于不导出隐藏列                    {                        colIndex++;                        worksheet.Cells[1, colIndex] = myDGV.Columns[i].HeaderText;                        //worksheet.Cells[1, i] = myDGV.Columns[i].HeaderText;                    }                }                //写入数值                for (int r = 0; r < myDGV.Rows.Count - 1; r++)                {                    colIndex = 0;                    for (int i = 0; i < myDGV.ColumnCount; i++)                    {                        if (myDGV.Columns[i].Visible)                        {                            colIndex++;                            worksheet.Cells[r + 2, colIndex] = myDGV.Rows[r].Cells[i].Value;                        }                    }                    System.Windows.Forms.Application.DoEvents();                }                worksheet.Columns.EntireColumn.AutoFit();//列宽自适应                if (path != "")                {                    try                    {                        workbook.Saved = true;                        workbook.SaveCopyAs(path);                        //fileSaved = true;                    }                    catch (Exception ex)                    {                        //fileSaved = false;                        MessageBox.Show("导出文件时出错,文件可能正被打开！\n\r" + ex.Message);                    }                }                xlApp.Quit();                GC.Collect();//强行销毁                // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL                 MessageBox.Show(path + "，导出成功", "系统提示", MessageBoxButtons.OK);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }         }        #endregion

 

方法二、IO基础流操作类

 

引用：using System.IO;

using System.Threading;

 

代码如下：

        #region导出数据表：Excle (io流操作类)        ///<summary>        ///导出数据表：Excle (io流操作类)        ///</summary>        ///<param name="myDGV"></param>        public void _ToExcel2(DataGridView myDGV)        {            string path = "";            SaveFileDialog saveDialog = new SaveFileDialog();            saveDialog.DefaultExt = "xls";            saveDialog.Filter = "Excel97-2003 (*.xls)|*.xls|All Files (*.*)|*.*";            saveDialog.ShowDialog();            path = saveDialog.FileName;            if (path.IndexOf(":") < 0) return; //判断是否点击取消            try            {                Thread.Sleep(1000);                StreamWriter sw = new StreamWriter(path, false, Encoding.GetEncoding("gb2312"));                StringBuilder sb = new StringBuilder();                //写入标题                for (int k = 0; k < myDGV.Columns.Count; k++)                {                    if (myDGV.Columns[k].Visible)//导出可见的标题                    {                        //"\t"就等于键盘上的Tab,加个"\t"的意思是: 填充完后进入下一个单元格.                        sb.Append(myDGV.Columns[k].HeaderText.ToString().Trim() + "\t");                    }                }                sb.Append(Environment.NewLine);//换行                //写入每行数值                for (int i = 0; i < myDGV.Rows.Count - 1; i++)                {                    System.Windows.Forms.Application.DoEvents();                    for (int j = 0; j < myDGV.Columns.Count; j++)                    {                        if (myDGV.Columns[j].Visible)//导出可见的单元格                        {                            //注意单元格有一定的字节数量限制,如果超出,就会出现两个单元格的内容是一模一样的.                            //具体限制是多少字节,没有作深入研究.                            sb.Append(myDGV.Rows[i].Cells[j].Value.ToString().Trim() + "\t");                        }                    }                    sb.Append(Environment.NewLine); //换行                }                sw.Write(sb.ToString());                sw.Flush();                sw.Close();                MessageBox.Show(path + "，导出成功", "系统提示", MessageBoxButtons.OK);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }         }        #endregion

 

         二种方法对比，利用IO基础流导出到Excel表格中的速度最快。特别是上10万行以上的数据，更是能体现其速度。

本文出自 “9212950” 博客，请务必保留此出处http://9222950.blog.51cto.com/9212950/1607070