asp.net怎么从数据库导出数据到客户端的excel里！

/// <summary>
/// 导出Excel
/// </summary>
/// <param name="dt">要导出的DataTable</param>
public void ExportToExcel(System.Data.DataTable dt)
{
if (dt == null) return;
Excel.Application xlApp = new Excel.Application();
if (xlApp == null)
{
Page.ClientScript.RegisterStartupScript(typeof(Page), "", "<script>alert('无法创建Excel对象，可能您的机子未安装Excel!')</script>");

return;
}
Excel.Workbooks workbooks = xlApp.Workbooks;
Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
worksheet.Name = "企业信息";
Excel.Range range = null;
long totalCount = dt.Rows.Count;
long rowRead = 0;
float percent = 0;
//写入标题
for (int i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
range = (Excel.Range)worksheet.Cells[1, i + 1];
//range.Interior.ColorIndex = 15;//背景颜色
range.Font.Bold = true;//粗体
range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;//居中
//加边框
range.BorderAround(Excel.XlLineStyle.xlContinuous, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, null);
//range.ColumnWidth = 4.63;//设置列宽
range.EntireColumn.AutoFit();//自动调整列宽
//r1.EntireRow.AutoFit();//自动调整行高
}
//写入内容
for (int r = 0; r < dt.Rows.Count; r++)
{
for (int i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i];
range = (Excel.Range)worksheet.Cells[r + 2, i + 1];
range.Font.Size = 9;//字体大小
//加边框
range.BorderAround(Excel.XlLineStyle.xlContinuous, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, null);
range.EntireColumn.AutoFit();//自动调整列宽
}
rowRead++;
percent = ((float)(100 * rowRead)) / totalCount;
}
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight = Excel.XlBorderWeight.xlThin;
if (dt.Columns.Count > 1)
{
range.Borders[Excel.XlBordersIndex.xlInsideVertical].Weight = Excel.XlBorderWeight.xlThin;
}
try
{
workbook.Saved = false;
//workbook.SaveAs(Server.MapPath("Excels/1.xls"), Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
//xlApp.Save(Server.MapPath("~/Manager/Excels/") + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls");
workbook.SaveCopyAs(System.Web.HttpRuntime.AppDomainAppPath + "Manager\\Excels\\" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls");
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(typeof(Page), "", "<script>alert('导出文件时出错,文件可能正被打开" + ex.Message + "!')</script>");
}
xlApp.Quit();
GC.Collect();//强行销毁
this.txt_hidden.Value = "";
//Page.ClientScript.RegisterStartupScript(typeof(Page), "", "<script>alert('Excel!导出成功')</script>");

} 这个是我用来导出的代码 你看看 是不是你想要的效果本回答被提问者采纳