导出DataGridView数据到Excel表

原文：https://blog.csdn.net/gnd15732625435/article/details/53580252 

添加引用

　　我们要实现数据导出到Excel这个功能，就需要引用一个命名空间，如图所示： 

             

在代码中添加命名空间：

using Excel = Microsoft.Office.Interop.Excel;

功能代码

private void btnExport_Click(object sender, EventArgs e) //点击导出到Excel表按钮
{
    string fileName = "";
    string saveFileName = "";
    SaveFileDialog saveDialog = new SaveFileDialog();
    saveDialog.DefaultExt = "xlsx";
    saveDialog.Filter = "Excel文件|*.xlsx";
    saveDialog.FileName = fileName;
    saveDialog.ShowDialog();
    saveFileName = saveDialog.FileName;
    if (saveFileName.IndexOf(":") < 0) return; //被点了取消
    Microsoft.Office.Interop.Excel.Application xlApp = 
                        new Microsoft.Office.Interop.Excel.Application();
    if (xlApp == null)
    {
        MessageBox.Show("无法创建Excel对象，您的电脑可能未安装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 < dataGridView1.ColumnCount; i++)
    { worksheet.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText; }
    //写入数值
    for (int r = 0; r < dataGridView1.Rows.Count; r++)
    {
        for (int i = 0; i < dataGridView1.ColumnCount; i++)
        {
            worksheet.Cells[r + 2, i + 1] = dataGridView1.Rows[r].Cells[i].Value;
        }
        System.Windows.Forms.Application.DoEvents();
    }
    worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
    MessageBox.Show(fileName + "资料保存成功", "提示", MessageBoxButtons.OK);
    if (saveFileName != "")
    {
        try
        {
            workbook.Saved = true;
            workbook.SaveCopyAs(saveFileName);  //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" + ex.Message);
        }
    }
    xlApp.Quit();
    GC.Collect();//强行销毁           
}