单击时获取标题文本，并在网格视图上使用自动生成的列

Question

单击时我想获取标题列名称。 我将gridview与自动生成的列一起使用，因为我不知道我随应用程序上传的excel文件的结构。

我试图将预定义的排序功能与sort ='true'属性一起使用，但这并不能解决我的问题。

<div>
        Import Excel File:  

        <asp:FileUpload ID="FileUpload1" runat="server"/> 
        <asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="Upload" />  
        <br />  
        <br />  
        <asp:Label ID="MessageLabel" runat="server"></asp:Label>  
        <br />
        <br />  
        <div style="width: 50%; height: 250px; overflow: scroll">
        <asp:GridView ID="gvExcelFile" runat="server" CellPadding="4" ForeColor="Black" Width="750px" AllowSorting="False" BackColor="#CCCCCC" BorderColor="#999999" BorderStyle="Solid" BorderWidth="3px" CellSpacing="2" Height="256px">
            <FooterStyle BackColor="#CCCCCC" />
            <HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#CCCCCC" ForeColor="Black" HorizontalAlign="Left" />
            <RowStyle BackColor="White" />
            <SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White"  />
            <SortedAscendingCellStyle BackColor="#F1F1F1" />
            <SortedAscendingHeaderStyle BackColor="Gray" />
            <SortedDescendingCellStyle BackColor="#CAC9C9" />
            <SortedDescendingHeaderStyle BackColor="#383838" />
        </asp:GridView>  
            <br />
            <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
            <asp:ObjectDataSource ID="ObjectDataSource1" runat="server"></asp:ObjectDataSource>
        </div>
    </div>  

protected void btnUpload_Click(object sender, EventArgs e)
        {

            string connectionString = "";
            if (FileUpload1.HasFile)
            {
                string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
                string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
                string fileLocation = Server.MapPath("~/App_Data/" + fileName);
                FileUpload1.SaveAs(fileLocation);
                if (fileExtension == ".xls")
                {
                    connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +
                    fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
                }
                else if (fileExtension == ".xlsx")
                {
                    connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
                    fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
                }
                OleDbConnection con = new OleDbConnection(connectionString);
                OleDbCommand cmd = new OleDbCommand();
                cmd.CommandType = System.Data.CommandType.Text;
                cmd.Connection = con;
                OleDbDataAdapter dAdapter = new OleDbDataAdapter(cmd);
                DataTable dtExcelRecords = new DataTable();
                con.Open();
                DataTable dtExcelSheetName = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                string getExcelSheetName = dtExcelSheetName.Rows[0]["Table_Name"].ToString();
                cmd.CommandText = "SELECT top 20 * FROM [" + getExcelSheetName + "]";
                dAdapter.SelectCommand = cmd;
                dtExcelRecords.Clear();
                dAdapter.Fill(dtExcelRecords);
                gvExcelFile.DataSource = dtExcelRecords;
                gvExcelFile.DataBind();

                con.Close();

            }
        }

我希望允许用户选择列以进行进一步的文件处理。

例如，如果单击某些列标题，则将该列名称附加在列表中，然后将其另存为某个数组中的数据，以便在数据库中进行进一步处理。