GridView中的用户控件

我试图重新审视此问题，因为我似乎找不到答案。我创建了一个用户控件，当我在Parent_ID中进行硬编码时，它可以很好地工作。但是，我想根据GridView的行中的值动态分配Parent_ID。

这是用户控件的代码背后：

Public Class Comments
Inherits System.Web.UI.UserControl
Public _name As String
<System.ComponentModel.Bindable(True), System.ComponentModel.Browsable(True)> _
Public Property Parent_ID() As String
    Get
        Return _name
    End Get
    Set(value As String)
        _name = value
    End Set
End Property

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Not IsPostBack Then
        If Parent_ID Is Nothing Then Parent_ID = "-1"

        DataSource_Comments.FilterParameters(0).DefaultValue = Parent_ID
        'lbl_Parent_Alert.Text = "Parent_ID: " & Parent_ID
    End If
End Sub   
End Class

ASP.net aspx页面：

    <%@ Page Title="About Us" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false"
        CodeBehind="About.aspx.vb" Inherits="MOO.About" %>
    <%@ Register TagPrefix="uc" TagName="Comments_Control"  Src="~/Comments.ascx" %>

    <asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
    </asp:Content>
    <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

        <asp:SqlDataSource ID="DataSource_Missed_Yesterday" runat="server" 
            ConnectionString="<%$ ConnectionStrings:MainMOOConnectionString %>" 
            SelectCommand="SELECT * FROM func_Missed_Yesterday() Order By Total_Price DESC"
            >
        </asp:SqlDataSource>

        <asp:GridView ID="GV_Missed_Yesterday" runat="server" DataSourceID="DataSource_Missed_Yesterday" 
            AutoGenerateColumns="false" CssClass="Grid_View">
           <Columns>
                <asp:BoundField DataField="num_Order_Num" HeaderText="Order Number"/>
                <asp:BoundField DataField="mem_Order_Notes" HeaderText="Order Notes"/>
                <asp:TemplateField HeaderText="Order Notes">
                    <ItemTemplate>
                        <asp:Label ID ='lbl' runat="server" text='<%#Eval("num_Order_Num") %>'/>
                        <uc:Comments_Control id="Comments_Control_ID" runat="server" Parent_ID='<%#Eval("num_Order_Num") %>' />
                    </ItemTemplate>
                </asp:TemplateField> 

            </Columns>
        </asp:GridView>

    </asp:Content>

Aspx.vb页面：

Imports System.Data
Public Class About
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

End Sub
Sub GV_Missed_Yesterday_DataBound(sender As Object, e As GridViewRowEventArgs) Handles GV_Missed_Yesterday.RowDataBound

    If e.Row.RowType = DataControlRowType.DataRow Then

    End If

End Sub
End Class

同样，如果我对这一行进行硬编码：

<uc:Comments_Control id="Comments_Control_ID" runat="server" Parent_ID='<%#Eval("num_Order_Num") %>' />  

如：

<uc:Comments_Control id="Comments_Control_ID" runat="server" Parent_ID='1162519' />   

我看到有关订单1162519的适当注释。当我将其保留为Eval（“ num_Order_Num”）时，我什么也没得到。

我预先感谢您指出正确的方向。

谢谢，
罗伯