从 VB 代码更改 GridView 中的列内容

Question

我正在显示一个数据网格，其中包括用户名和个人资料图片等。 如果他们没有上传个人资料图片，我已经设置了下面的代码来设置 imgPic.ImageUrl = "~/files/images/blankProfilePic.png"

但是，这仅适用于显示的 6 页数据的第一页。当您切换到第二页时，我会看到丢失的图片图标，因为下面的代码仅适用于显示的初始页面。 我需要更改此代码以在每个页面上工作，因为它仅在页面加载时调用。

VB 代码

---

Protected Sub Page_LoadComplete(sender As Object, e As System.EventArgs) Handles Me.LoadComplete

    Dim acc As New accounts(Membership.GetUser.ProviderUserKey)

    If acc.region = "North East" Then
        For Each r As GridViewRow in gdvNorthEast.Rows
            If r.RowType = DataControlRowType.DataRow Then
                Dim imgPic As Image
                imgPic = r.Cells(4).FindControl("imgProfilePic")
                If imgPic.ImageUrl = "~/catalog/images/"                                                                                                                                        
                    imgPic.ImageUrl = "~/files/images/blankProfilePic.png"
                End If
            End If
        Next r
    End If

ASP.NET

---

<asp:SqlDataSource 
     ID="DSLeaderboardNorthEast"
     runat="server"
     ConnectionString="<%$ ConnectionStrings:DBConnectionString %>"
     SelectCommand="SELECT tblAccounts.contactName, tblAccounts.profilePic, tblAccounts.minAge, tblAccounts.maxAge, tblAccounts.AccountID, tblAccounts.region
                    FROM tblAccounts 
                    WHERE tblAccounts.region='North East' 
                    ORDER BY tblAccounts.contactName ">
</asp:SqlDataSource>

<asp:GridView ID="gdvNorthEast" width="100%" runat="server" AllowPaging="True" AutoGenerateColumns="False" CssClass="mGrid" DataKeyNames="accountID" DataSourceID="DSLeaderboardNorthEast" PageSize="20" AllowSorting="True">
    <AlternatingRowStyle CssClass="alt" />
    <Columns>
        <asp:TemplateField ShowHeader="False">
            <ItemTemplate>
                <asp:Image ID="imgProfilePic" AlternateText="Players profile picture" runat="server" width="100px" height="100px" ImageUrl='<%# "~/catalog/images/" &  Eval("ProfilePic").ToString %>' />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="contactName" HeaderText="Player Name" />     
        <asp:BoundField DataField="minAge" HeaderText="Won" />
        <asp:BoundField DataField="maxAge" HeaderText="Lost" />
        <asp:TemplateField ShowHeader="False">
            <ItemTemplate>
                    <asp:HyperLink ID="hypMessage" runat="server" CssClass="nyroModalMsg" NavigateUrl='<%# "~/sendLeaderboardMessage.aspx?" & "&aID=" & Eval("accountID").ToString %>'>Msg</asp:HyperLink>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Answer 1

用于分配默认图像的 foreach 循环应该是可重用的方法。

使用PageIndexChanged 事件处理程序调用相同的可重用方法。

更新： 由于上述选项没有帮助，请关注this post

    //RowDataBound Event  
protected void gdvNorthEast_RowDataBound(object sender, GridViewRowEventArgs e)  
{  
    //Checking the RowType of the Row  
    if(e.Row.RowType==DataControlRowType.DataRow)  
    {  
        //your logic goes here without foreach loop  
    }  
}  

Answer 2

使用Gridview_RowDataBound事件使替换功能改为使用for指令