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POBind asp:Parameter in asp:SqlDataSource to Database field
 

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    <p>I use an <code>asp:SqlDataSource</code> Element to fetch Data and then display it in an <code>asp:ListView</code>.</p> <p>For the sake of simplicity, let's assume the Database consists of the rows and <code>id</code>, <code>author</code> (it's actually more, but that doesn't matter). </p> <p>This is the code I use:</p> <pre><code>&lt;asp:SqlDataSource ID="NewsDataSource" runat="server" ConnectionString="&lt;%$ connectionStrings:RemoteSqlConnection %&gt;" ProviderName="System.Data.SqlClient" SelectCommand="SELECT * FROM [news]" UpdateCommand="UPDATE [news] SET author=@author WHERE id=@id" DeleteCommand="DELETE FROM [news] WHERE id=@id" InsertCommand="INSERT INTO [news] (author) VALUES (@author)"&gt; &lt;UpdateParameters&gt; &lt;asp:Parameter Name="id" Type="Int32" /&gt; &lt;/UpdateParameters&gt; &lt;DeleteParameters&gt; &lt;asp:Parameter Name="id" Type="Int32" /&gt; &lt;/DeleteParameters&gt; &lt;/asp:SqlDataSource&gt; </code></pre> <p>My problem is, that the parameter <code>id</code> which I define for <code>UpdateParameters</code> and <code>DeleteParameters</code> is always <code>null</code>. It doesn't seem to be associated with the database field <code>id</code>. </p> <p>One hack which allowed me to fix the problem (but only for the update case) was to insert an invisible <code>asp:Label</code> to which I binded the <code>id</code> (Just like I binded the Author field to a Textbox). </p> <p>I don't think that the ListView code should be relevant, but I'll try to include some lines which are relevant here:</p> <pre><code>&lt;asp:ListView runat="server" DataSourceID="NewsDataSource"&gt; &lt;LayoutTemplate&gt; &lt;div id="itemPlaceholder" runat="server"&gt;&lt;/div&gt; &lt;/LayoutTemplate&gt; &lt;ItemTemplate&gt; &lt;%# Eval("author")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;!-- This line is only the workaround solution --&gt;&lt;asp:Label ID="idLabel" runat="server" Text='&lt;%# Bind("id")%&gt;'&gt;&lt;/asp:Label&gt; &lt;asp:TextBox ID="authorTextbox" runat="server" Text='&lt;%# Bind("author")%&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:ListView&gt; </code></pre>
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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.

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