Question

这是我的SQL数据库中的数据表，下面是我的Repeater控件的代码：

ArticleID int NOT NULL,
ArticleTitle varchar(100) NOT NULL,
ArticleCategory int NOT NULL,
ArticleDate datetime NOT NULL,
ArticleContent text NOT NULL,
DeletedYN char(3) NOT NULL

<asp:Repeater runat="server" ID="rptArticles" DataSourceID="dsLatestArticles">
    <HeaderTemplate>
        <span class="title"><%#Container.DataItem("ArticleTitle")%></span><br />
        <span class="title3">Posted On: <%#Container.DataItem("ArticleDate")%></span>
    </HeaderTemplate>
    <ItemTemplate><p><%#Container.DataItem("ArticleContent")%></p></ItemTemplate>
    <FooterTemplate>
        <p class="RightAlign"><a href="/Articles/Read.aspx?i=<%#Container.DataItem("ArticleID") %>">Read more...</a></p>
    </FooterTemplate>
</asp:Repeater>

当我尝试加载此页面时，我收到错误消息Object variable or With block variable not set.

作为参考，我的SqlDataSource配置如下：

<asp:SqlDataSource ID="dsLatestArticles" runat="server" 
    ConnectionString="<%$ ConnectionStrings:VBSiteConnectionString %>"        
    SelectCommand="SELECT [ArticleID], [ArticleTitle], [ArticleDate], [ArticleContent] FROM [Articles] WHERE ([DeletedYN] = @DeletedYN)">
    <SelectParameters>
        <asp:Parameter DefaultValue="No" Name="DeletedYN" Type="String" />
    </SelectParameters>
</asp:SqlDataSource>

我不知道我在这里做错了什么，有谁能看到问题？如需进一步参考，请参阅我的Stack Trace：

[NullReferenceException: Object variable or With block variable not set.]
   Microsoft.VisualBasic.CompilerServices.Container..ctor(Object Instance) +510276
   Microsoft.VisualBasic.CompilerServices.NewLateBinding.InternalLateIndexGet(Object Instance, Object[] Arguments, String[] ArgumentNames, Boolean ReportErrors, ResolutionFailure& Failure) +88
   Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateIndexGet(Object Instance, Object[] Arguments, String[] ArgumentNames) +21
   ASP.default_aspx.__DataBind__control3(Object sender, EventArgs e) in D:\Development\Projects\Web\LogansArchive\Default.aspx:9
   System.Web.UI.Control.OnDataBinding(EventArgs e) +99
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +92
   System.Web.UI.Control.DataBind() +15
   System.Web.UI.Control.DataBindChildren() +211
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +102
   System.Web.UI.Control.DataBind() +15
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +124
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +323
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +51
   System.Web.UI.WebControls.Repeater.DataBind() +75
   System.Web.UI.WebControls.Repeater.EnsureDataBound() +55
   System.Web.UI.WebControls.Repeater.OnPreRender(EventArgs e) +15
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

提前致谢！

Answer 1

如果其他人遇到此问题，这是我找到的解决方案

原因
我在我的Repeater控件的<HeaderTemplate>部分从我的SqlDataSource中提取数据。这就是造成这个问题的原因。我不确定为什么，但重点是这样做是行不通的。

解决方案
所有数据检索（即<%#Container.DataItem("Field1") %>阻止）必须才能在Repeater控件的<ItemTemplate>部分中使用。

ASP转发器和SQL数据源的问题

1 个答案: