GridView Edit Button Requires 2 Clicks - asp.net

Question

When pressing edit button in gridview, edit template is displayed only after 2 clicks.
And another problem: Value of the field to edit is displayed in gridview initially, but not in edit template.
Asp code:
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" CellPadding="4" OnRowEditing="EditRow"
OnRowCancelingEdit="CancelEditRow" DataKeyNames="AREA" DataMember="DefaultView">
<Columns>
<asp:BoundField DataField="AREA" HeaderText="AREA" ReadOnly="True"
SortExpression="AREA" />
<asp:TemplateField HeaderText="LEADER_USER" SortExpression="LEADER_USER">
<ItemTemplate><%#Eval("leader_user")%></ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtleaderuser" runat="server" Text='<%#Eval("leader_user")%>'/>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="editButton" runat="server" CommandName="Edit"
ImageUrl="images/pencil1.png" Text="Edit" ToolTip="Edit" />
</ItemTemplate>
<EditItemTemplate>
<asp:Button ID="BtnUpdate" runat="server" CommandName="Update"
Text="Update" />
<asp:Button ID="BtnCancel" runat="server" CommandName="Cancel"
Text="Cancel" />
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
vb code:
Protected Sub EditRow(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
GridView1.EditIndex = e.NewEditIndex
GridView1.DataSource = SqlDataSource1
'If Not IsPostBack Then
'GridView1.DataSourceID = SqlDataSource1.ID
'GridView1.DataBind()
'End If
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
SqlDataSource1.SelectCommand = "SQL"
SqlDataSource1.ConnectionString = "My conn string"
If Not IsPostBack Then
'GridView1.DataSourceID = SqlDataSource1.ID
GridView1.DataSource = SqlDataSource1
GridView1.DataBind()
End If
End Sub

Answer 1

I think you need to call DataBind to rebind the data source. You've commented it out, but it looks like you had it in a IsPostBack block, which would only execute on the initial page load.
Try:
Protected Sub EditRow(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
GridView1.EditIndex = e.NewEditIndex
GridView1.DataSource = SqlDataSource1
GridView1.DataBind()
End Sub