说明：
1>GridView 导出到 Excel (如果分页，只导出当前页数据)
2>GridView 导出到 Excel
3>方法2可以参考DataTable 导出到 Excel
自定义类如下：
#region GridView 导出到 Excel Method First
/// <summary>
/// GridView 导出到 Excel (如果分页，只导出当前页数据)
/// </summary>
/// <param name="gv">GridView</param>
/// <param name="sheetName">工作表名称</param>
/// <param name="isOpen">导出完成后是否打开Excel 如果不打开会自动杀死当前Excel进程</param>
/// <returns>错误信息，如果为空，说明用户取消导入</returns>
public static string GvToExcel(DevExpress.XtraGrid.Views.Grid.GridView gv, string sheetName, bool isOpen)
{
//返回值
string str = "";
string fileName = "";
//保存对话框，是否保存
SaveFileDialog sfd = new SaveFileDialog();
sfd.Filter = "(*.xls,*.xlsx)|*.xls;*.xlsx";
if (sfd.ShowDialog() != DialogResult.OK)
{
str = "";
return str;
}
fileName = sfd.FileName;
if (gv == null)
{
str = "GridView 不能为空！";
return str;
}
if (gv.RowCount < 1)
{
str = "没有记录可以导出";
return str;
}
//获取列名、列标题 放到List集合中
System.Collections.ArrayList listCaption = new System.Collections.ArrayList();
System.Collections.ArrayList listFieldName = new System.Collections.ArrayList();
for (int i = 0; i < gv.Columns.Count; i++)
{
if (gv.Columns[i].Visible)
{
listCaption.Add(gv.Columns[i].Caption);
listFieldName.Add(gv.Columns[i].FieldName);
}
}
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
excel.Workbooks.Add(true);
Microsoft.Office.Interop.Excel.Worksheet wSheet = (Microsoft.Office.Interop.Excel.Worksheet)excel.ActiveSheet;
Microsoft.Office.Interop.Excel.Range range;
if (sheetName != null && sheetName.Length > 0)
{
wSheet.Name = sheetName;
}
else
{
wSheet.Name = gv.Name;
}
try
{
//写标题
for (int j = 0; j < listCaption.Count; j++)
{
excel.Cells[1, j + 1] = listCaption[j];
range = (Microsoft.Office.Interop.Excel.Range)wSheet.Cells[1, j + 1];
range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;
}
//写内容
for (int m = 0; m < gv.RowCount; m++)
{
for (int n = 0; n < listCaption.Count; n++)
{
excel.Cells[m + 2, n + 1] = gv.GetRowCellValue(m, listFieldName[n].ToString()) is DBNull ? "" : gv.GetRowCellValue(m, listFieldName[n].ToString()).ToString();
}
}
wSheet.SaveAs(fileName,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
str = "导出成功！共导出 " + gv.RowCount + " 条数据";
return str;
}
catch
{
str = "导出异常，请重试";
return str;
}
finally
{
if (isOpen)
{
//前台显示给用户
excel.Visible = true;
wSheet = null;
excel = null;
}
else
{
excel.Visible = false;
excel.Quit();
// excel = null;
//杀死Excel 进程
KillProcess(excel);
}
GC.Collect();
}
}
#endregion
#region GridView 导出到 Excel Method Second
/// <summary>
/// GridView 导出到 Excel
/// </summary>
/// <param name="dt">GridControl.DataSource ==dt</param>
/// <param name="gv">GridView 名称</param>
/// <param name="sheetName">工作表名称</param>
/// <param name="isOpen">导出完成后是否打开Excel 如果不打开会自动杀死当前Excel进程</param>
/// <returns>错误信息，如果为空，说明用户取消导入</returns>
public static string GvToExcel(DataTable dt, DevExpress.XtraGrid.Views.Grid.GridView gv, string sheetName, bool isOpen) {
//返回值
string str = "";
//执行方法,如果datatable为空，导出当前页数据，否则，导出所有页数据
if(dt==null){
str=GvToExcel(gv,sheetName,isOpen);
}else{
if (gv == null)
{
str = "GridView 不能为空！";
return str;
}
if (gv.RowCount < 1)
{
str = "没有记录可以导出";
return str;
}
//获取列名、列标题 放到List集合中
System.Collections.ArrayList listCaption = new System.Collections.ArrayList();
System.Collections.ArrayList listFieldName = new System.Collections.ArrayList();
for (int i = 0; i < gv.Columns.Count; i++)
{
if (gv.Columns[i].Visible)
{
listCaption.Add(gv.Columns[i].Caption);
listFieldName.Add(gv.Columns[i].FieldName);
}
}
//将ArrayList 转换成 一维数组
string[] captions = (string[])listCaption.ToArray(typeof(string));
string[] fieldName =(string[]) listFieldName.ToArray(typeof(string));
//推荐使用List<> 因为ArrayList转换时会装、拆箱，影响效率
//List<string> list = new List<string>();
//list.Add("aa");
//string[] aaa =list.ToArray();
str=DtToExcel(dt,captions,fieldName,sheetName,isOpen);
}
return str;
}
#endregion
调用（举例）：
string str =Functionjsj.GvToExcel(gridView1, "学生信息", true);
if (str.Length > 0) {
MessageBox.Show(str, System.Windows.Forms.Application.ProductName);
return;
}
//说明 导出的表为 dt表中gridview1显示的列的集合
string str = Functionjsj.GvToExcel(dt,gridView1, "学生信息", true);
if (str.Length > 0)
{
MessageBox.Show(str, System.Windows.Forms.Application.ProductName);
return;
}
时间： 2024-10-29 03:57:23