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POIn a FormView, how to change the property of a Label in the ItemTemplate?
 

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  1. POIn a FormView, how to change the property of a Label in the ItemTemplate?
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    <p>In ASP.NET, I have a FormView which is bound to an ObjectDataSource. The FormView has an ItemTemplate with a Delete button, and a Label. I'm handling the OnItemDeleted event of the FormView to detect if my business class throws an exception upon deletion. If an exception is detected, I change the text of the Label to whatever the exception message is.</p> <p>Well, it's just not working.</p> <p>I detect the Exception fine, but the Text of the Label never gets changed. When the page reloads, the default text stays. I have also tried to rebind the FormView with DataBind() after assigning the new Text, but it's not working either.</p> <p>In a desperate attempt at tracking the problem, I've taken the Label out of the FormView and it's working fine.</p> <p>What I am doing wrong?</p> <p>ASPX page:</p> <pre><code>&lt;asp:ObjectDataSource ID="MyObjectDataSource" TypeName="MyScopeRepository" SelectMethod="GetById" DeleteMethod="Delete" runat="server"&gt; &lt;SelectParameters&gt; &lt;%-- The id param here is from a DropDownList, not included in the example for clarity. --%&gt; &lt;asp:ControlParameter Name="id" Type="Int32" ControlID="MyDropDownList" PropertyName="SelectedValue" /&gt; &lt;/SelectParameters&gt; &lt;DeleteParameters&gt; &lt;asp:Parameter Name="id" Type="Int32" /&gt; &lt;/DeleteParameters&gt; &lt;/asp:ObjectDataSource&gt; &lt;asp:FormView ID="MyFormView" DataSourceID="MyObjectDataSource" RenderOuterTable="false" DataKeyNames="Id" OnItemDeleted="MyFormViewItemDeleted" runat="server"&gt; &lt;ItemTemplate&gt; &lt;asp:Button CssClass="Button Small" Text="Delete" CommandName="Delete" runat="server" /&gt;&lt;br /&gt; &lt;asp:Label ID="ErrorLabel" Text="Default text" runat="server" /&gt; &lt;/ItemTemplate&gt; &lt;/asp:FormView&gt; </code></pre> <p>Code-behind:</p> <pre><code>protected void MyFormViewItemDeleted(object sender, FormViewDeletedEventArgs e) { if (e.Exception != null &amp;&amp; e.Exception.InnerException is RepositoryException) { Label errorLabel = (Label)MyFormView.FindControl("ErrorLabel"); errorLabel.Text = e.Exception.InnerException.Message; e.ExceptionHandled = true; // I also tried this to no avail. //MyFormView.DataBind(); } } </code></pre> <p>Thanks a lot!</p> <p>EDIT: I've checked all events fired by the FormView when clicking the Delete button and here is what I got:</p> <ol> <li>OnInit</li> <li>OnItemCreated</li> <li>OnLoad</li> <li>OnItemCommand</li> <li>OnItemDeleting</li> <li>OnItemDeleted</li> <li>OnItemCreated</li> <li>OnDataBound</li> <li>OnPreRender</li> <li>OnUnload</li> </ol> <p>So we can see that OnItemCreated gets fired twice, and the second time it's fired is AFTER OnItemDeleted, which means that whatever change I make is overwritten, I suppose. Now how am I supposed to handle that?</p>
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    1. CO@md1337 check whether the execution comes into the loop with break point...
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    2. COis it something present in form view like data bound event in grid view ?
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      1. USAndrew Collins
    3. CO@Pandiya- What loop? I have verified that the execution reaches MyFormViewItemDeleted and specifically the errorLabel.Text line, if that's what you mean.
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