Here is an example of how to edit records using a ListView. A working example is here.
<%@ Page Language="vb" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<style type="text/css">
.movie
{
border: solid 1px black;
padding:5px;
margin:3px;
}
.edit
{
background-color:lightyellow;
}
</style>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Edit ListView</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ListView
ID="lstMovies"
DataSourceId="srcMovies"
DataKeyNames="Id"
runat="server">
<LayoutTemplate>
<asp:Placeholder
id="itemPlaceholder"
runat="server" />
</LayoutTemplate>
<ItemTemplate>
<div class="movie">
<strong><%# Eval("Title") %></strong>
<br />
<em>Directed by <%# Eval("Director") %></em>
<br />
<asp:LinkButton
id="lnkEdit"
Text="{Edit}"
CommandName="Edit"
Runat="server" />
<asp:LinkButton
id="lnkDelete"
Text="{Delete}"
CommandName="Delete"
OnClientClick="return confirm('You can't delete movies')"
Runat="server" />
</div>
</ItemTemplate>
<EditItemTemplate>
<div class="movie edit">
<asp:Label
id="lblTitle"
Text="Title:"
AssociatedControlID="txtTitle"
Runat="server" />
<br />
<asp:TextBox
id="txtTitle"
Text='<%# Bind("Title") %>'
Runat="server" />
<br /><br />
<asp:Label
id="lblDirector"
Text="Director:"
AssociatedControlID="txtDirector"
Runat="server" />
<br />
<asp:TextBox
id="txtDirector"
Text='<%# Bind("Director") %>'
Runat="server" />
<br /><br />
<asp:LinkButton
id="lnkUpdate"
Text="Save"
CommandName="Update"
Runat="server" />
<asp:LinkButton
id="lnkCancel"
Text="Cancel"
CommandName="Cancel"
Runat="server" />
</div>
</EditItemTemplate>
</asp:ListView>
<asp:SqlDataSource
id="srcMovies"
SelectCommand="SELECT Id, Title, Director FROM Movies"
UpdateCommand="Update Movie SET Title=@Title, Director=@Director
WHERE Id=@Id"
DeleteCommand="Delete Movies WHERE Id=@Id"
ConnectionString='<%$ ConnectionStrings:MyDatabase %>'
Runat="server" />
</div>
</form>
</body>
</html>