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    <p>Put your <code>EditPanel</code> in a EditItemTemplate and use <code>Commands</code> , you are not using this control the way it was designed to be used:</p> <p><a href="http://msdn.microsoft.com/en-us/library/90xwe9s3%28v=VS.80%29.aspx" rel="nofollow">How to: Allow Users to Edit Items in DataList Web Server Controls</a> </p> <p><strong>Markup:</strong></p> <pre><code>&lt;asp:SqlDataSource ID="AllLettersDataSource" runat="server" ConnectionString="&lt;%$ ConnectionStrings:ORMSTestConnectionString %&gt;" SelectCommand="SELECT * FROM [Letters] WHERE ([id] = @id)"&gt; &lt;SelectParameters&gt; &lt;asp:ControlParameter ControlID="HiddenLetterID" DefaultValue="1" Name="id" PropertyName="Value" Type="Int32" /&gt; &lt;/SelectParameters&gt; &lt;!--change this --&gt; UpdateCommand="UPDATE [Categories] SET [CategoryName] = @CategoryName, [Description] = @Description WHERE [CategoryID] = @original_CategoryID"&gt; &lt;UpdateParameters&gt; &lt;asp:Parameter Name="CategoryName" Type="String" /&gt; &lt;asp:Parameter Name="Description" Type="String" /&gt; &lt;asp:Parameter Name="original_CategoryID" Type="Int32" /&gt; &lt;/UpdateParameters&gt; &lt;/asp:SqlDataSource&gt; &lt;asp:DataList ID="LettersDataList" runat="server" DataSourceID="AllLettersDataSource" OnEditCommand="LettersDataList_EditCommand" OnCancelCommand="LettersDataList_CancelCommand" OnUpdateCommand="LettersDataList_UpdateCommand"&gt; &lt;ItemTemplate&gt; &lt;asp:Panel ID="ViewPanel" runat="server"&gt; &lt;h2&gt; Data1:&lt;/h2&gt; &lt;asp:Label ID="data1Label" runat="server" BorderStyle="Solid" BorderWidth="1px" Height="100px" Text='&lt;%# Eval("data1") %&gt;' Width="500px" /&gt; &lt;h2&gt; data2:&lt;/h2&gt; &lt;asp:Label ID="data2Label" runat="server" BorderStyle="Solid" BorderWidth="1px" Height="100px" Text='&lt;%# Eval("data2") %&gt;' Width="500px" /&gt; &lt;h2&gt; data3:&lt;/h2&gt; &lt;asp:Label ID="data3Label" runat="server" BorderStyle="Solid" BorderWidth="1px" Height="100px" Text='&lt;%# Eval("data3") %&gt;' Width="500px" /&gt; &lt;/asp:Panel&gt; &lt;asp:Button ID="EditButton" runat="server" CommandName="edit" Text="Edit" /&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:Panel ID="EditPanel" runat="server"&gt; &lt;h2&gt; data1:&lt;/h2&gt; &lt;asp:TextBox ID="data1TextBox" runat="server" Height="100px" Text='&lt;%# Eval("data1", "{0}") %&gt;' TextMode="MultiLine" Width="500px"&gt;&lt;/asp:TextBox&gt; &lt;h2&gt; data2:&lt;/h2&gt; &lt;asp:TextBox ID="data2TextBox" runat="server" Height="100px" Text='&lt;%# Eval("data2", "{0}") %&gt;' TextMode="MultiLine" Width="500px"&gt;&lt;/asp:TextBox&gt; &lt;h2&gt; data3:&lt;/h2&gt; &lt;asp:TextBox ID="data3TextBox" runat="server" Height="100px" Text='&lt;%# Eval("data3", "{0}") %&gt;' TextMode="MultiLine" Width="500px"&gt;&lt;/asp:TextBox&gt; &lt;/asp:Panel&gt; &lt;asp:LinkButton ID="LinkButton1" runat="server" CommandName="update"&gt; Save &lt;/asp:LinkButton&gt; &amp;nbsp; &lt;asp:Button ID="CancelButton" runat="server" CommandName="cancel" Text="Cancel" Visible="False" /&gt; &lt;/EditItemTemplate&gt; &lt;/asp:DataList&gt; </code></pre> <p><strong>Code-behind:</strong></p> <pre><code> protected void LettersDataList_EditCommand(object source, DataListCommandEventArgs e) { LettersDataList.EditItemIndex = e.Item.ItemIndex; LettersDataList.DataBind(); } protected void LettersDataList_CancelCommand(object source, DataListCommandEventArgs e) { LettersDataList.EditItemIndex = -1; LettersDataList.DataBind(); } protected void LettersDataList_UpdateCommand(object source, DataListCommandEventArgs e) { //change this to your database needs //String categoryID = // LettersDataList.DataKeys[e.Item.ItemIndex].ToString(); //String categoryName = // ((TextBox)e.Item.FindControl("textCategoryName")).Text; //String description = // ((TextBox)e.Item.FindControl("textDescription")).Text; //SqlDataSource1.UpdateParameters["original_CategoryID"].DefaultValue // = categoryID; //SqlDataSource1.UpdateParameters["categoryName"].DefaultValue // = categoryName; //SqlDataSource1.UpdateParameters["Description"].DefaultValue // = description; //SqlDataSource1.Update(); LettersDataList.EditItemIndex = -1; LettersDataList.DataBind(); } </code></pre>
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    1. COThanks for this, I thought I was doing something wrong and your answer helped a lot. I also found out that I had HTML in my text boxes and validation was stopping the form from submitting. In hindsight, that was the issue and so _technically_ this wasn't the answer to my problem, but as I said it helped a lot and also revealed the real issue to me.
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    2. COCool, glad it helped, I hadn't seen anyone use it that way before, I learned something new.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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