How to create custom delete and edit button in gridview using asp.net

How to create custom delete and edit button in grid view using asp.net :




Why the delete button is not working and just refreshing page when clicked for the first time and then works at the second time.  Know i will try to solve this problem here.
First we create a gridview in .aspx page .

<asp:GridView ID="GuitarBrandsGridView" runat="server" CssClass="mydatagrid" 
PagerStyle-CssClass="pager" HeaderStyle-CssClass="header" RowStyle-CssClass="rows"
 AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="id"
 DataSourceID="SqlDataSource0" OnRowDataBound="GuitarBrandsGridView_RowDataBound" 
OnRowCancelingEdit="GuitarBrandsGridView_RowCancelingEdit" 
OnRowEditing="GuitarBrandsGridView_RowEditing"
 OnRowUpdating="GuitarBrandsGridView_RowUpdating" 
 OnRowDeleting="GuitarBrandsGridView_RowDeleting" Width="864px" Height="250px">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:Button ID="GuitarBrandsGridViewBtnDelete" runat="server"
 CommandName="Delete" Text="Delete"/>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:Button ID="GuitarBrandsGridViewBtnEdit" runat="server"
 CommandName="Edit" Text="Edit"/>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:Button ID="GuitarBrandsGridViewBtnUpdate" runat="server" 
CommandName="Update" Text="Update"/>
                    <asp:Button ID="GuitarBrandsGridViewBtnCancel" runat="server" 
CommandName="Cancel" Text="Cancel"/>
                </EditItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="id" SortExpression="id">
                <EditItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("id") %>'>
</asp:Label>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("id") %>'>
</asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="type" SortExpression="type">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("type") %>'>
</asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label3" runat="server" Text='<%# Bind("type") %>'>
</asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="name" SortExpression="name">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("name") %>'>
</asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label4" runat="server" Text='<%# Bind("name") %>'>
</asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="image" SortExpression="image">
                <EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("image") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label5" runat="server" Text='<%# Bind("image") %>'>
</asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <HeaderStyle CssClass="header"></HeaderStyle>
        <PagerStyle CssClass="pager"></PagerStyle>
        <RowStyle CssClass="rows"></RowStyle>
    </asp:GridView>
    </div>
    <asp:SqlDataSource ID="SqlDataSource0" runat="server" 
ConnectionString="<%$ ConnectionStrings:brandsConnection %>" 
DeleteCommand="DELETE FROM [guitarBrands] WHERE [id] = @id" 
InsertCommand="INSERT INTO [guitarBrands] ([id], [type], [name], [image])
 VALUES (@id, @type, @name, @image)" 
SelectCommand="SELECT [id], [type], [name], [image] FROM [guitarBrands]" 
UpdateCommand="UPDATE [guitarBrands] 
SET [type] = @type, [name] = @name, [image] = @image WHERE [id] = @id">
        <DeleteParameters>
            <asp:Parameter Name="id" Type="Int32" />
        </DeleteParameters>


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