Display Edit and Delete buttons only on hover

The following example demonstrates how to display the "Edit" and "Delete" buttons only when user hovers over the rows.

Implementation

For initially hiding the "Edit" and "Delete" buttons for a particular RadGrid we are setting the CssClass property of the GridEditCommandButton and GridClientDeleteColumn (to "showOnHover" in the example below). Afterwords, using that CSS class as a selector we are handling the displaying on hover:

<style type="text/css">
    .showOnHover>*{
        visibility: hidden;
    }

    .rgRow:hover .showOnHover>*,
    .rgAltRow:hover .showOnHover>*{
        visibility: visible;
    }
</style>        

<telerik:RadGrid runat="server" ID="RadGrid1" OnNeedDataSource="RadGrid1_NeedDataSource" Width="600px" RenderMode="Lightweight">            
    <MasterTableView AutoGenerateColumns="false">                
        <Columns>
            <telerik:GridBoundColumn DataField="ID" HeaderText="ID" HeaderStyle-Width="80px"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="FirstName" HeaderText="FirstName" HeaderStyle-Width="200px"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="LastName" HeaderText="LastName" HeaderStyle-Width="200px"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="Age" HeaderText="Age" HeaderStyle-Width="80px"></telerik:GridBoundColumn>
            <telerik:GridEditCommandColumn HeaderStyle-Width="40px" ButtonType="ImageButton" ItemStyle-CssClass="showOnHover"></telerik:GridEditCommandColumn>
            <telerik:GridClientDeleteColumn HeaderStyle-Width="40px" ItemStyle-CssClass="showOnHover"></telerik:GridClientDeleteColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    DataTable table = new DataTable();
    table.Columns.Add("ID", typeof(int));
    table.Columns.Add("FirstName", typeof(string));
    table.Columns.Add("LastName", typeof(string));
    table.Columns.Add("Age", typeof(int));
    for (int i = 0; i < 5; i++)
    {
        table.Rows.Add(i, "FirstName" + i, "LastName" + i, 20 + i);
    }

    (sender as RadGrid).DataSource = table;
}