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POasp.net ListView Sorting using DataBind
 

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    <p><strong>Sort listview using column headings in the LayoutTemplate</strong></p> <p>I am able to sort a basic list view using asp:SqlDataSource and setting the list view property DataSourceID by pointing it to the asp:SqlDataSource ID. I am having an issue when sorting when not using the asp:SqlDataSource and just DataBinding from the code behind.</p> <p><strong>SqlDataSource Example:</strong></p> <pre><code>&lt;asp:ListView ID="ContactsListView" DataSourceID="ContactsDataSource" runat="server"&gt; &lt;LayoutTemplate&gt; &lt;table width="640px" runat="server"&gt; &lt;tr class="header" align="center" runat="server"&gt; &lt;td&gt; &lt;asp:LinkButton runat="server" ID="SortByFirstNameButton" CommandName="Sort" Text="First Name" CommandArgument="FirstName" /&gt; &lt;/LayoutTemplate&gt; .... &lt;/asp:ListView&gt; &lt;asp:SqlDataSource ID="ContactsDataSource" runat="server" ConnectionString="&lt;%$ ConnectionStrings:MainConnString %&gt;" SelectCommand="SELECT * FROM TableName"&gt; &lt;/asp:SqlDataSource&gt; </code></pre> <p><strong>DataBind Example:</strong></p> <pre><code>&lt;asp:ListView ID="ContactsListView" DataSourceID="ContactsDataSource" runat="server"&gt; &lt;LayoutTemplate&gt; &lt;table width="640px" runat="server"&gt; &lt;tr class="header" align="center" runat="server"&gt; &lt;td&gt; &lt;asp:LinkButton runat="server" ID="SortByFirstNameButton" CommandName="Sort" Text="First Name" CommandArgument="FirstName" /&gt; &lt;/LayoutTemplate&gt; .... &lt;/asp:ListView&gt; protected void Page_Load(object sender, EventArgs e) { String SQL = "SELECT * FROM Customer"; SqlDataAdapter da= new SqlDataAdapter(SQL, ConnStr); DataSet ds = new DataSet(); da.Fill(ds); ContactsListView.DataSource = ds.Tables[0]; ContactsListView.DataBind(); } </code></pre> <p>Both code samples populate the list view, but the second example data binding does not work for sorting. With the first example, the sorting just works with the added asp:LinkButton in the LayoutTemplate adding the CommandName="sort" and setting the CommandArugment="ColumnName", but it does not work with the second example.</p> <p>Can anyone please explain why and how to get the sorting working using the code behind DataBind method?</p> <p>Thanks!</p>
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    1. COThere's nothing in your code that handles sorting - what did you try that caused a problem? You could add an `ORDER BY` clause to the SQL query, or perhaps add some code-behind to sort it on data binding - it depends what you want to achieve; let us know.
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    2. COBoth examples populate the listview, but with the first example, I do not have to add any additional code to get the sorting to work, when clicking on the column headings.
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    3. COI figured out my solution, and will post it later tonight. My reputation won't allow me to post it until 8 hours after. Basically as the below answers suggest, I had to create my own OnSort event handler, to re-query the database into a DataTable, sort the DataTable then bind it back to the ListView. If there is a way to resort without having to make another call to the database, please let me know.
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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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