C# DataGridView控件中数据导出到Excel

方法一：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
using Microsoft.Office.Interop.Excel;

namespace TestEXCLE
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            _DataGridView = this.dataGridView1;
            ExportToExcel("www");

        }

     
        private DataGridView _DataGridView;
        private string _FileName = "";

        ///// <summary>
        ///// 构造函数
        ///// </summary>
        ///// <param name="ownerForm">拥用者窗体</param>
        ///// <param name="dataGridView">DataGridView对象</param>
            public Form1(Form ownerForm, DataGridView dataGridView)
            {
           
            _DataGridView = dataGridView;
            }

        /// <summary>
        /// 导出到Excel
        /// </summary>
        /// <param name="pfileName">文件名,不需要带扩展名</param>
        public void ExportToExcel(string pfileName)
        {
            _FileName = pfileName == null ? "未命名" : pfileName.Trim();

            string fileName = ShowSaveFileDialog("Microsoft Excel Document", "Microsoft Excel|*.xls");
            if (fileName != "")
            {
                try
                {
                    ExportTo(fileName);
                    OpenFile(fileName);
                }
                catch (System.Exception err)
                {
                    MessageBox.Show(err.Message);
                }
            }
        }

        /// <summary>
        /// 导出到
        /// </summary>
        /// <param name="fileName">文件名</param>
        private void ExportTo(string fileName)
        {

            //
            //获取指定文件是否存在
            bool isExist = System.IO.File.Exists(fileName);
            //
            //定义一个缺少的object对象           
            object oMis = System.Reflection.Missing.Value;

            //
            //定义一个Excel区域对象,用于保存选择的区域
            Microsoft.Office.Interop.Excel.Range selectRange;
            //
            //声明一Excel Application 对象
            Microsoft.Office.Interop.Excel.ApplicationClass App = null;
            //
            //声明一Excel Workbook 对象
            Microsoft.Office.Interop.Excel.Workbook wb = null;
            //
            //声明一Excel Worksheet 对象
            Microsoft.Office.Interop.Excel.Worksheet ws = null;

            //
            //将当前水标状态保存到临时变量中后将光标置为忙状态
            Cursor currentCursor = Cursor.Current;
            Cursor.Current = Cursors.WaitCursor;

            try
            {
                App = new Microsoft.Office.Interop.Excel.ApplicationClass();

                //
                //判断指定的文件是否存在
                if (isExist)
                {
                    //
                    //打开已存在的工作薄 Workbook
                    wb = App.Workbooks.Open(fileName, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis, oMis);
                    //新建工作表
                    ws = (Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets.Add(oMis, oMis, 1, oMis);
                    //指定工作表名
                    ws.Name = this.Text + wb.Sheets.Count; //加 wb.Sheets.Count 防止重名
                }
                else
                {
                    //
                    //增加一工作薄 Workbook
                    wb = App.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                    //新建工作薄后默认有一个工作表,取得第一个工作表
                    ws = (Microsoft.Office.Interop.Excel.Worksheet)wb.Sheets[1];
                    //指定工作表名
                    ws.Name = this.Text;
                }

                //
                //增加一工作表 Worksheet     

                //
                //声明两个变量记录Excle当前操作的行号与列号
                int rown = 0;
                int coln = 0;

                //
                //声明一变量用于记录当前DatagridView的总行数
                int colCount = _DataGridView.Columns.Count;

                _DataGridView.SuspendLayout();

                //
                //将DataGirdView列头写入Excel中
                foreach (DataGridViewColumn dgvc in _DataGridView.Columns)
                {
                    selectRange = ws.get_Range(ws.Cells[rown + 1, ++coln], ws.Cells[rown + 1, coln]);
                    selectRange.Columns.ColumnWidth = dgvc.Width / 10;
                    selectRange.Interior.ColorIndex = 16;
                    selectRange.Interior.Pattern = Microsoft.Office.Interop.Excel.Constants.xlSolid;
                    selectRange.Font.ColorIndex = 2;
                    selectRange.HorizontalAlignment = Microsoft.Office.Interop.Excel.Constants.xlCenter;
                    selectRange.VerticalAlignment = Microsoft.Office.Interop.Excel.Constants.xlCenter;
                    selectRange.set_Item(1, 1, dgvc.HeaderText);
                }

                //
                //行号增加一
                rown++;

                //
                //将DataGridView中所有的行数写入Excel中
                foreach (DataGridViewRow dgvr in _DataGridView.Rows)
                {
                    for (int i = 0; i < colCount; i++)
                    {
                        selectRange = ws.get_Range(ws.Cells[rown + 1, i + 1], ws.Cells[rown + 1, i + 1]);
                        selectRange.set_Item(1, 1, dgvr.Cells[i].Value);
                    }
                    rown++;
                }

                //
                //写入完成后将有数据的范围内设置其边框与内部线条
                ws.UsedRange.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeTop].Weight = 3;
                ws.UsedRange.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeBottom].Weight = 3;
                ws.UsedRange.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeLeft].Weight = 3;
                ws.UsedRange.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeRight].Weight = 3;
                ws.UsedRange.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = 2;
                ws.UsedRange.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = 2;

                //
                //设置Wookbook为已保存状态
                wb.Saved = true;

                if (isExist)
                {
                    wb.Save();
                }
                else
                {
                    //
                    //将当前工作薄保存为指定的文件名
                    wb.SaveCopyAs(fileName);
                }
            }
            catch (Exception exp)
            {
                MessageBox.Show(exp.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {

                _DataGridView.ResumeLayout();

                wb.Close(false, null, null);
                //
                //退出Excel程序
                App.Quit();

                //
                //将当前光标更改回原来的状态
                Cursor.Current = currentCursor;
            }

        }
        /// <summary>
        /// 打开文件
        /// </summary>
        /// <param name="fileName">文件名</param>
        private void OpenFile(string fileName)
        {
            if (MessageBox.Show("你想打开这个文件吗?", "导出到...", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                try
                {
                    System.Diagnostics.Process process = new System.Diagnostics.Process();
                    process.StartInfo.FileName = fileName;
                    process.StartInfo.Verb = "Open";
                    process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
                    process.Start();
                }
                catch
                {
                    MessageBox.Show(this, "你的计算机中未安装Excel,不能打开该文档!" , this.ProductName
                        , MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        /// <summary>
        /// 显示保存文件对话框,并返回选择的文件路径
        /// </summary>
        /// <param name="title">对话框的标题</param>
        /// <param name="filter">过滤器</param>
        /// <returns>选择的文件路径</returns>
        private string ShowSaveFileDialog(string title, string filter)
        {
            SaveFileDialog dlg = new SaveFileDialog();
            string name = _FileName;
            int n = name.LastIndexOf(".") + 1;
            if (n > 0) name = name.Substring(n, name.Length - n);
            dlg.Title = "导出到" + title;
            dlg.FileName = name;
            dlg.Filter = filter;
            if (dlg.ShowDialog() == DialogResult.OK) return dlg.FileName;
            return "";
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: 这行代码将数据加载到表“testDataSet2.chengji”中。您可以根据需要移动或移除它。
            this.chengjiTableAdapter.Fill(this.testDataSet2.chengji);

        }
    }
}

方法二：

#region DataGridView数据显示到Excel
/// <summary>
/// 打开Excel并将DataGridView控件中数据导出到Excel
/// </summary>
/// <param name="dgv">DataGridView对象 </param>
/// <param name="isShowExcle">是否显示Excel界面 </param>
/// <remarks>
/// add com "Microsoft Excel 11.0 Object Library"
/// using Excel=Microsoft.Office.Interop.Excel;
/// </remarks>
/// <returns> </returns>
public bool DataGridviewShowToExcel(DataGridView dgv, bool isShowExcle)
{
    if (dgv.Rows.Count == 0)
        return false;
    //建立Excel对象
    Excel.Application excel = new Excel.Application();
    excel.Application.Workbooks.Add(true);
    excel.Visible = isShowExcle;
    //生成字段名称
    for (int i = 0; i < dgv.ColumnCount; i++)
    {
        excel.Cells[1, i + 1] = dgv.Columns[i].HeaderText;
    }
    //填充数据
    for (int i = 0; i < dgv.RowCount - 1; i++)
    {
        for (int j = 0; j < dgv.ColumnCount; j++)
        {
            if (dgv[j, i].ValueType == typeof(string))
            {
                excel.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();
            }
            else
            {
                excel.Cells[i + 2, j + 1] = dgv[j, i].Value.ToString();
            }
        }
    }
    return true;
}
#endregion

方法三：

#region DateGridView导出到csv格式的Excel
/// <summary>
/// 常用方法，列之间加\t，一行一行输出，此文件其实是csv文件，不过默认可以当成Excel打开。
/// </summary>
/// <remarks>
/// using System.IO;
/// </remarks>
/// <param name="dgv"></param>
private void DataGridViewToExcel(DataGridView dgv)
{
    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";

    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 += "";
                    else
                        columnValue += 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();
        }
    }
}
#endregion

方法四：

#region DataGridView导出到Excel，有一定的判断性
/// <summary>
///方法，导出DataGridView中的数据到Excel文件
/// </summary>
/// <remarks>
/// add com "Microsoft Excel 11.0 Object Library"
/// using Excel=Microsoft.Office.Interop.Excel;
/// using System.Reflection;
/// </remarks>
/// <param name= "dgv"> DataGridView </param>
public static void DataGridViewToExcel(DataGridView dgv)
{

    #region   验证可操作性

    //申明保存对话框
    SaveFileDialog dlg = new SaveFileDialog();
    //默然文件后缀
    dlg.DefaultExt = "xls ";
    //文件后缀列表
    dlg.Filter = "EXCEL文件(*.XLS)|*.xls ";
    //默然路径是系统当前路径
    dlg.InitialDirectory = Directory.GetCurrentDirectory();
    //打开保存对话框
    if (dlg.ShowDialog() == DialogResult.Cancel) return;
    //返回文件路径
    string fileNameString = dlg.FileName;
    //验证strFileName是否为空或值无效
    if (fileNameString.Trim() == " ")
    { return; }
    //定义表格内数据的行数和列数
    int rowscount = dgv.Rows.Count;
    int colscount = dgv.Columns.Count;
    //行数必须大于0
    if (rowscount <= 0)
    {
        MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
        return;
    }

    //列数必须大于0
    if (colscount <= 0)
    {
        MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
        return;
    }

    //行数不可以大于65536
    if (rowscount > 65536)
    {
        MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
        return;
    }

    //列数不可以大于255
    if (colscount > 255)
    {
        MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
        return;
    }

    //验证以fileNameString命名的文件是否存在，如果存在删除它
    FileInfo file = new FileInfo(fileNameString);
    if (file.Exists)
    {
        try
        {
            file.Delete();
        }
        catch (Exception error)
        {
            MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            return;
        }
    }
    #endregion
    Excel.Application objExcel = null;
    Excel.Workbook objWorkbook = null;
    Excel.Worksheet objsheet = null;
    try
    {
        //申明对象
        objExcel = new Microsoft.Office.Interop.Excel.Application();
        objWorkbook = objExcel.Workbooks.Add(Missing.Value);
        objsheet = (Excel.Worksheet)objWorkbook.ActiveSheet;
        //设置EXCEL不可见
        objExcel.Visible = false;

        //向Excel中写入表格的表头
        int displayColumnsCount = 1;
        for (int i = 0; i <= dgv.ColumnCount - 1; i++)
        {
            if (dgv.Columns[i].Visible == true)
            {
                objExcel.Cells[1, displayColumnsCount] = dgv.Columns[i].HeaderText.Trim();
                displayColumnsCount++;
            }
        }
        //设置进度条
        //tempProgressBar.Refresh();
        //tempProgressBar.Visible   =   true;
        //tempProgressBar.Minimum=1;
        //tempProgressBar.Maximum=dgv.RowCount;
        //tempProgressBar.Step=1;
        //向Excel中逐行逐列写入表格中的数据
        for (int row = 0; row <= dgv.RowCount - 1; row++)
        {
            //tempProgressBar.PerformStep();

            displayColumnsCount = 1;
            for (int col = 0; col < colscount; col++)
            {
                if (dgv.Columns[col].Visible == true)
                {
                    try
                    {
                        objExcel.Cells[row + 2, displayColumnsCount] = dgv.Rows[row].Cells[col].Value.ToString().Trim();
                        displayColumnsCount++;
                    }
                    catch (Exception)
                    {

                    }

                }
            }
        }
        //隐藏进度条
        //tempProgressBar.Visible   =   false;
        //保存文件
        objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,
                Missing.Value, Missing.Value);
    }
    catch (Exception error)
    {
        MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        return;
    }
    finally
    {
        //关闭Excel应用
        if (objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);
        if (objExcel.Workbooks != null) objExcel.Workbooks.Close();
        if (objExcel != null) objExcel.Quit();

        objsheet = null;
        objWorkbook = null;
        objExcel = null;
    }
    MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

#endregion

以上资料来自网络，非常感谢各位作者