检查一下，不需要第三方库，您可以使用以下命令将数据表数据导出到excel文件

var dt = "your code for getting data into datatable";
            Response.ClearContent();
            Response.AddHeader("content-disposition", string.Format("attachment;filename={0}.xls", DateTime.Now.ToString("yyyy-MM-dd")));
            Response.ContentType = "application/vnd.ms-excel";
            string tab = "";
            foreach (DataColumn dataColumn in dt.Columns)
            {
                Response.Write(tab + dataColumn.ColumnName);
                tab = "\t";
            }
            Response.Write("\n");
            int i;
            foreach (DataRow dataRow in dt.Rows)
            {
                tab = "";
                for (i = 0; i < dt.Columns.Count; i++)
                {
                    Response.Write(tab + dataRow[i].ToString());
                    tab = "\t";
                }
                Response.Write("\n");
            }
            Response.End();

public class GridViewExportUtil
{
    public static void Export(string fileName, GridView gv)
    {
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.AddHeader(
            "content-disposition", string.Format("attachment; filename={0}", fileName));
        HttpContext.Current.Response.ContentType = "application/ms-excel";

        using (StringWriter sw = new StringWriter())
        {
            using (HtmlTextWriter htw = new HtmlTextWriter(sw))
            {
                //  Create a form to contain the grid
                Table table = new Table();

                //  add the header row to the table
                if (gv.HeaderRow != null)
                {
                    GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                    table.Rows.Add(gv.HeaderRow);
                }

                //  add each of the data rows to the table
                foreach (GridViewRow row in gv.Rows)
                {
                    GridViewExportUtil.PrepareControlForExport(row);
                    table.Rows.Add(row);
                }

                //  add the footer row to the table
                if (gv.FooterRow != null)
                {
                    GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                    table.Rows.Add(gv.FooterRow);
                }

                //  render the table into the htmlwriter
                table.RenderControl(htw);

                //  render the htmlwriter into the response
                HttpContext.Current.Response.Write(sw.ToString());
                HttpContext.Current.Response.End();
            }
        }
    }

    /// <summary>
    /// Replace any of the contained controls with literals
    /// </summary>
    /// <param name="control"></param>
    private static void PrepareControlForExport(Control control)
    {
        for (int i = 0; i < control.Controls.Count; i++)
        {
            Control current = control.Controls[i];
            if (current is LinkButton)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as LinkButton).Text));
            }
            else if (current is ImageButton)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText));
            }
            else if (current is HyperLink)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as HyperLink).Text));
            }
            else if (current is DropDownList)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as DropDownList).SelectedItem.Text));
            }
            else if (current is CheckBox)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as CheckBox).Checked ? "True" : "False"));
            }

            if (current.HasControls())
            {
                GridViewExportUtil.PrepareControlForExport(current);
            }
        }
    }
}

嗨，这个解决方案是将网格视图导出到excel文件中，这可能会帮助您

下面是使用LINQ to XML完成此操作的方法，并提供示例代码：

用LINQ to XML快速导入和导出Excel数据

它有点复杂，因为您必须导入名称空间等等，但它确实可以避免任何外部依赖。

（当然，它是VB.NET，而不是C#，但您可以始终在自己的项目中隔离VB.NET内容，以使用XML文字，并使用C#执行其他所有操作。）

商业解决方案SpreadsheetGearfor.NET将做到这一点。

您可以在此处查看ASP.NET（C#和VB）的实时示例，并在此处下载评估版本。

免责声明：我拥有SpreadsheetGear LLC

您只需使用Excel XML格式将其写入XML，并以.XLS扩展名命名，它将以Excel打开。您可以控制XML文件标题中的所有格式（粗体、宽度等）。

维基百科中有一个XML示例。

您可以使用ExcelXmlWriter。

它工作得很好。