如何使用按钮获取网格视图c＃asp.net中的列ID，然后打开另一个Web部件，该Web部件将使用网格视图中的ID从SL服务器收集信息？

我已经为网格视图执行了此操作：

    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="btnView" runat="server" Text="View" /> 
            </ItemTemplate>
        </asp:TemplateField>
     </Columns>
    </asp:GridView>

对于在Gridview中填充的来自sqlserver的信息，代码为：

   protected void GridView_Load(object sender,EventArgs e)
        {
            using (DBEntitiesModelConn DbContext = new DBEntitiesModelConn())
            {
                try
                {
                    GridView.AutoGenerateColumns = true;
                    var ApplicationData = from i in DbContext.DBEntity
                                          select new
                                          {
                                              CompanyName = i.Name.ToString(),ApplicationStatus = i.Status.ToString(),ApplicationDate = i.DateSubmitted.ToString(),applicationid = i.ID.ToString(),};
                    GridView.DataSource = ApplicationData.ToList();
                    GridView.DataBind();
                }
                catch (System.Data.SqlClient.SqlException ex)
                {
                    ErrorMessage.Text = ex.Message.ToString();
                }
            }
        }

        protected void OnRowdatabound(object sender,system.web.UI.WebControls.GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                e.Row.Attributes["onclick"] = Page.ClientScript.GetPostBackClientHyperlink(ViewApplicationsGrid,"Select$" + e.Row.RowIndex);
                e.Row.ToolTip = "Click to select this row.";
            }
        }