DataGridView从excel导入、导出到excel

最新推荐文章于 2017-10-31 08:48:10 发布

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最新推荐文章于 2017-10-31 08:48:10 发布

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分类专栏： VB.NET 文章标签： Excel C# DataGridView 导入导出

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本文介绍了如何使用C#实现DataGridView与Excel之间的数据交互，包括从Excel导入数据到DataGridView显示，以及将DataGridView中的数据导出回Excel文件，详细阐述了整个过程并展示了运行效果。

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从excel导入数据到DataGridView:

 #region Excel文件数据导入DataGidView
        /// <summary>
        /// 读取excel内的数据，返回DataTable
        /// </summary>
        /// <param name="strExcelFileName"></param>
        /// <returns></returns>
        public DataTable ImportExcel(string strExcelFileName)
        {
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + strExcelFileName + "';Excel 8.0; HDR=YES；IMEX=1;";
            string strExcel = string.Format("select * from [{0}$]", "Test");
            DataSet ds = new DataSet();
            using (OleDbConnection conn = new OleDbConnection(strConn))
            {
                conn.Open();
                OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);
                adapter.Fill(ds, "sheet1");
                return ds.Tables["sheet1"];
            }
        }
        #endregion

将数据从DataGridView导出到excel中：

        #region DataGidView数据到导出excel
        /// <summary>
        /// DataGidView数据到导出excel
        /// </summary>
        /// <param name="fileName">导出Excel文件名</param>
        /// <param name="myDGV">要导出数据的DataGidView</param>
        public void ExportExcel(string saveFileName, DataGridView myDGV)
        {
            Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
            if (xlApp == null)
            {
                MessageBox.Show("无法创建Excel对象，可能你的机器上没有安装Excel！");
                return;
            }

            Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
            Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
            Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 

            //写入标题
            for (int i = 0; i < myDGV.ColumnCount; i++)
            {
                worksheet.Cells[1, i + 1] = myDGV.Columns[i].HeaderText;
            }
            //写入数据
            for (int r = 0; r < myDGV.Rows.Count; r++)
            {
                for (int i = 0; i < myDGV.ColumnCount; i++)
                {
                    worksheet.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells[i].Value;
                }
                System.Windows.Forms.Application.DoEvents();
            }
            worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
            if (saveFileName != "")
            {
                try
                {
                    workbook.Saved = true;
                    workbook.SaveCopyAs(saveFileName);
                }
                catch (Exception ex)
                {
                    MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);
                    return;
                }
            }
            xlApp.Quit();
            GC.Collect();//强行销毁 
        }
        #endregion

运行界面：

窗口load:

private void ExcelFromTo_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt = ImportExcel("Test.xls");
            dataGridView1.DataSource = dt;
            dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            dataGridView1.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            dataGridView1.Columns[2].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            dataGridView1.Columns[0].FillWeight = 40;
            dataGridView1.Columns[1].FillWeight = 30;
            dataGridView1.Columns[2].FillWeight = 30;
            ExportExcel("ttt.xls", dataGridView1);
        }