เมื่อนำเมาส์ไปชี้ที่รูปแล้วมีข้อความขึ้นค่ะ มีรูปด้วย

<asp:HyperLinkField Text="<img src='../images/edit.gif' border='0' />" DataNavigateUrlFormatString="EditUser.aspx?UserName={0}" DataNavigateUrlFields="UserName" />

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" OnRowDataBound="GridView1_RowDataBound">
    <Columns>
        <asp:BoundField HeaderText="ID" />
        <asp:CommandField ButtonType="Image" ShowEditButton="true" EditImageUrl="~/Images/EditIcon.gif" ShowDeleteButton="true" DeleteImageUrl="~/Images/delete_icon.gif" />
    </Columns>
</asp:GridView>

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
	If e.Row.RowType = DataControlRowType.DataRow Then
		Dim EditButton As ImageButton = TryCast(e.Row.Cells(1).Controls(0), ImageButton)
		EditButton.AlternateText = "แก้ไข"
		EditButton.ToolTip = "แก้ไข"

		'เนื่องจาก controls(1) = LiteralControl จึงใช้ Controls(2)
		Dim DeleteButton As ImageButton = TryCast(e.Row.Cells(1).Controls(2), ImageButton)
		DeleteButton.AlternateText = "ลบ"
		DeleteButton.ToolTip = "ลบ"
	End If
End Sub

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" OnRowDataBound="GridView1_RowDataBound">
	<Columns>
		<asp:BoundField HeaderText="ID" visible="False" />
		<asp:TemplateField>
			<ItemStyle Width="160px" HorizontalAlign="Center" />
                        <ItemTemplate>
				<asp:ImageButton ID="ImageButtonEdit" runat="server
					ToolTip ="แก้ไขข้อมุล" ImageUrl ="~/images/edit.gif" 
					PostBackUrl='EditUser.aspx?username=<%# Bind("username") %>' />				
                        </ItemTemplate>
		</asp:TemplateField>
	</Columns>
</asp:GridView>

 <asp:GridView ID="gvwUsers" runat="server" AutoGenerateColumns="false" DataKeyNames="UserName"
      OnRowCreated="gvwUsers_RowCreated">
      <Columns>
         <asp:BoundField HeaderText="UserName" DataField="UserName" />
         <asp:HyperLinkField HeaderText="E-mail" DataTextField="Email" DataNavigateUrlFormatString="mailto:{0}" DataNavigateUrlFields="Email" />
         <asp:BoundField HeaderText="Created" DataField="CreationDate" DataFormatString="{0:dd/MM/yyyy HH:mm }" />
         <asp:BoundField HeaderText="Last activity" DataField="LastActivityDate" DataFormatString="{0:dd/MM/yyyy HH:mm }" />
         <asp:CheckBoxField HeaderText="Approved" DataField="IsApproved" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" />
 
        
 <asp:HyperLinkField Text="<img src='../images/edit.gif' alt='แก้ไข' border='0' />" DataNavigateUrlFormatString="EditUser.aspx?UserName={0}" DataNavigateUrlFields="UserName" />

 <asp:ButtonField CommandName="Delete" ButtonType="Image" ImageUrl="~/images/delete.gif" />
     

 </Columns>
      <EmptyDataTemplate><b>ไม่พบผู้ใช้ที่ต้องการค้นหา</b></EmptyDataTemplate>
    </asp:GridView>

 Protected Sub gvwUsers_RowCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvwUsers.RowCreated
            If e.Row.RowType = DataControlRowType.DataRow Then
                Dim btn As ImageButton = CType(e.Row.Cells(6).Controls(0), ImageButton)
                btn.OnClientClick = "if (confirm('คุณต้องการลบผู้ใช้นี้หรือไม่?') == false) return false;"
                btn.ToolTip = "ลบผู้ใช้"
           
            End If
        End Sub