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POHow to Bind complex data to control in ListView (class User contain instance of class UserType)
 

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  1. POHow to Bind complex data to control in ListView (class User contain instance of class UserType)
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    <p>I have 2 value class</p> <pre><code>public class UserType { public int ID; public string TypeName; } public class User { public int ID; public string UserName; public UserType Type; } </code></pre> <p>1 proccessing class</p> <pre><code>public class Users { public User[] GetUsers() { //Retrive and re turn User array } public int Update(User user, User old_user) { //Update user } } </code></pre> <p>1 ListView and 1 ObjectDataSource</p> <pre><code>&lt;asp:ListView ID="lsvUser" runat="server" DataKeyNames="ID" DataSourceID="odsUser" ItemPlaceholderID="plhItem" onitemupdating="lsvUser_ItemUpdating"&gt; &lt;LayoutTemplate&gt; &lt;ul&gt;&lt;asp:PlaceHolder ID="plhItem" runat="server"&gt;&lt;/asp:PlaceHolder&gt;&lt;/ul&gt; &lt;/LayoutTemplate&gt; &lt;ItemTemplate&gt; &lt;li&gt; &lt;asp:Label ID="lblID" runat="server" Text='&lt;%# Eval("ID") %&gt;'&gt;&lt;/asp:Label&gt; &lt;asp:Label ID="lblUserName" runat="server" Text='&lt;%# Eval("UserName") %&gt;'&gt;&lt;/asp:Label&gt; &lt;asp:Label ID="lblTypeName" runat="server" Text='&lt;%# Eval("Type.TypeName") %&gt;'&gt;&lt;/asp:Label&gt; &lt;asp:LinkButton ID="btEdit" runat="server" CssClass="button" CommandName="Edit" Text="Edit"&gt;&lt;/asp:LinkButton&gt; &lt;/li&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;li class="editRow"&gt; &lt;asp:Textbox ID="txbUserName" runat="server" Text='&lt;%# Bind("UserName") %&gt;'&gt;&lt;/asp:Textbox &gt; &lt;asp:Textbox ID="txbTypeName" runat="server" Text='&lt;%# Bind("Type.TypeName") %&gt;'&gt;&lt;/asp:Textbox &gt; &lt;/li&gt; &lt;/EditItemTemplate&gt; &lt;/asp:ListView&gt; &lt;asp:ObjectDataSource ID="odsUser" runat="server" TypeName="BLL.Users" DataObjectTypeName="BLL.User" SelectMethod="GetUsers" UpdateMethod="Update" ConflictDetection="CompareAllValues" OldValuesParameterFormatString="old_{0}"&gt;&lt;/asp:ObjectDataSource&gt; </code></pre> <p>When data is loaded into the ItemTemplate, the ListView interprets Type.TypeName and binds correctly, but when updating the record, I cannot retrieve the old_user.Type from the old values. So old_user.Name and old_user.ID have values but old_user.Type is null.</p> <p>Help me. I have been searching for about 2 days and cannot find a solution. I can bind data for a new user like this:</p> <pre><code>protected void lsvUser_ItemUpdating(object sender, ListViewUpdateEventArgs e) { e.NewValues.Add("Type", new BLL.UserType() { TypeName = Convert.ToString(((TextBox)lsvUser.EditItem.FindControl("txbTypeName")).Text) }); } </code></pre> <p>But I don't know how to retrieve the old values (how to retrive value of lblTypeName). Help me. If there is a solution that doesn't require additional code in the ItemUpdating event, please teach me.</p> <p>Thank you.</p>
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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.

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