将网格视图数据插入已经存在的excel c＃

我的任务是将网格视图数据添加到已格式化的Excel中，我需要在列标题/标题之后插入网格视图数据到现有Excel的第一行。 插入数据时，我不知道我在做什么错误？ 请在下面find我的模板excel，asp-dot-net code。

高强

Column1 Column2 Total1 =Sum(A2+B2) =Sum(A2+B2) 

Dotnet代码：

 <%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ExcelExport._Default" %> <asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> </asp:Content> <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <h2> Welcome to ASP.NET! </h2> <p> To learn more about ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>. </p> <p> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Show" /> <asp:Button ID="Button2" runat="server" Text="Export to Excel" onclick="Button2_Click" /> </p> <p> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"> <Columns> <asp:BoundField DataField="Column1" HeaderText="A" /> <asp:BoundField DataField="Column2" HeaderText="B" /> <asp:BoundField DataField="Total" HeaderText="Total" /> <asp:BoundField DataField="Total1" HeaderText="FinalTotal" /> </Columns> </asp:GridView> </p> <p> You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&amp;clcid=0x409" title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>. </p> </asp:Content> 

代码绑定

 using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.OleDb; using System.Data; using System.Configuration; using System.Data.SqlClient; namespace ExcelExport { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { string connection = null; connection = ConfigurationManager.ConnectionStrings["Local"].ConnectionString; SqlConnection con = new SqlConnection(connection); string query = "select * from calc"; con.Open(); SqlCommand cmd = new SqlCommand(query, con); SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); da.Fill(ds); con.Close(); if (ds.Tables.Count > 0) { GridView1.DataSource = ds; GridView1.DataBind(); } } protected void Button2_Click(object sender, EventArgs e) { int gridi, j, value1, value2, value3; int rowcount = GridView1.Rows.Count; int Colcount = 3; String[] cellText; string constr, sheetinfo = ""; string path = "D:\\Template.xlsx"; constr = ConfigurationManager.ConnectionStrings["Excel07+ConString"].ConnectionString; constr = string.Format(constr, path); using (OleDbConnection excel_con = new OleDbConnection(constr)) { excel_con.Open(); string sheet1 = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null).Rows[0]["TABLE_NAME"].ToString(); DataTable dtExcelData = new DataTable(); dtExcelData = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null); String[] excelSheets = new String[dtExcelData.Rows.Count]; int i = 0; foreach (DataRow row in dtExcelData.Rows) { excelSheets[i] = row["TABLE_NAME"].ToString(); i++; } // sheetinfo = excelSheets[2]; try { foreach (GridViewRow row in GridView1.Rows) { int count = 2; value1 = Convert.ToInt32(row.Cells[0].Text.Trim()); value2 = Convert.ToInt32(row.Cells[1].Text.Trim()); //value3 = Convert.ToInt32(row.Cells[2].Text.Trim()); //string excelquery = "Insert into ["+sheetinfo+"A2:C20000] (Column1,Column2,Column3) values(" + value1 + "," + value2 + "," + value3 + ")"; //string excelquery = "Insert into [sheet1$](A" + count + ",B" + count + ",C" + count + ") values(" + value1 + "," + value2 + "," + value3 + ")"; string excelquery = "Insert into [Sheet1$](Column1, Column2) values(" + value1 + "," + value2 + ")"; using (OleDbDataAdapter oda = new OleDbDataAdapter(excelquery, excel_con)) { oda.Fill(dtExcelData); } excel_con.Close(); count += 1; } } catch (Exception ex) { } } } } }