c# datagridview导出到excel

方法一：添加dll引用
右击选择你所在的项目的“引用”，选择“添加引用”。
弹出“添加引用”对话框。
选择“COM”选项卡。
选择“Microsoft Excel 11.0 Object Library”
单击“确定”按钮。
代码
public static bool ExportForDataGridview(DataGridView gridView, string fileName, bool isShowExcle)
        {
            //建立Ｅｘｃｅｌ对象
            Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
            try
            {
                if (app == null)
                {
                    return false;
                }
                app.Visible = isShowExcle;
                Workbooks workbooks = app.Workbooks;
                _Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
                Sheets sheets = workbook.Worksheets;
                _Worksheet worksheet = (_Worksheet)sheets.get_Item(1);
                if (worksheet == null)
                {
                    return false;
                }
                string sLen = "";
                //取得最后一列列名
                char H = (char)(64 + gridView.ColumnCount / 26);
                char L = (char)(64 + gridView.ColumnCount % 26);
                if (gridView.ColumnCount < 26)
                {
                    sLen = L.ToString();
                }
                else
                {
                    sLen = H.ToString() + L.ToString();
                }
                //标题
                string sTmp = sLen + "1";
                Range ranCaption = worksheet.get_Range(sTmp, "A1");
                string[] asCaption = new string[gridView.ColumnCount];
                for (int i = 0; i < gridView.ColumnCount; i++)
                {
                    asCaption[i] = gridView.Columns[i].HeaderText;
                }
                ranCaption.Value2 = asCaption;
                //数据
                object[] obj = new object[gridView.Columns.Count];
                for (int r = 0; r < gridView.RowCount - 1; r++)
                {
                    for (int l = 0; l < gridView.Columns.Count; l++)
                    {
                        if (gridView[l, r].ValueType == typeof(DateTime))
                        {
                            obj[l] = gridView[l, r].Value.ToString();
                        }
                        else
                        {
                            obj[l] = gridView[l, r].Value;
                        }
                    }
                    string cell1 = sLen + ((int)(r + 2)).ToString();
                    string cell2 = "A" + ((int)(r + 2)).ToString();
                    Range ran = worksheet.get_Range(cell1, cell2);
                    ran.Value2 = obj;
                }
                //保存
                workbook.SaveCopyAs(fileName);
                workbook.Saved = true;
            }
            finally
            {
                //关闭
                app.UserControl = false;
                app.Quit();
            }
            return true;
        }
方法二
用流保存成xls文件. 这种方法比较好,不用引用Excel组件.   下面是具体例子,可以参考
using System.IO;
        ///
/// 另存新档按钮
///
private void SaveAs() //另存新档按钮 导出成Excel
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
saveFileDialog.FilterIndex = 0;
saveFileDialog.RestoreDirectory = true;
saveFileDialog.CreatePrompt = true;
saveFileDialog.Title = "Export Excel File To";
saveFileDialog.ShowDialog();
Stream myStream;
myStream = saveFileDialog.OpenFile();
//StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding("gb2312"));
StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
string str = "";
try
{
//写标题
for (int i = 0; i < dgvAgeWeekSex.ColumnCount; i++)
{
if (i > 0)
{
str += "/t";
}
str += dgvAgeWeekSex.Columns[i].HeaderText;
}
sw.WriteLine(str);
//写内容
for (int j = 0; j < dgvAgeWeekSex.Rows.Count; j++)
{
string tempStr = "";
for (int k = 0; k < dgvAgeWeekSex.Columns.Count; k++)
{
if (k > 0)
{
tempStr += "/t";
}
tempStr += dgvAgeWeekSex.Rows[j].Cells[k].Value.ToString();
}
sw.WriteLine(tempStr);
}
sw.Close();
myStream.Close();
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
finally
{
sw.Close();
myStream.Close();
}
}