Make asp buttonfield visible at runtime

Question

I have an <asp:ButtonField> inside a gridview. How do I target the button in the gridview to make it Visible on runtime based on a condition ? I am not able to target it since it doesnt have the ID property. I am stuck here. Here is the code below

<asp:GridView ID="OrdersDataList1" runat="server"  DataKeyNames="OrderID" Width="100%" SkinID="Gridview" OnPageIndexChanging="orders_PageIndexChanging" 
    EmptyDataText="You have no orders." AllowSorting="True" OnSorting="OnSort" AllowPaging="true" PageSize="15" AutoGenerateColumns="False" OnRowCommand="updateStatus">
    <Columns>
        <asp:BoundField DataField="CustomerUser_ID" HeaderText="UserID" Visible="true" />
        <asp:BoundField DataField="OrderID" HeaderText="OrderNo" InsertVisible="False" ReadOnly="True" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left" SortExpression="OrderID" />
        <asp:BoundField DataField="OrderDate" HeaderText="OrderDate" SortExpression="OrderDate" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center"/>
        <asp:BoundField DataField="Base" HeaderText="Base" DataFormatString="{0:C}"   SortExpression="Base" HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right"/>
        <asp:BoundField DataField="Freight" HeaderText="Freight" DataFormatString="{0:C}"   SortExpression="Freight" HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right"/>
        <asp:BoundField DataField="Total" HeaderText="Total" DataFormatString="{0:C}"   SortExpression="Total" HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right"/>
        <asp:BoundField DataField="Products" HeaderText="Products" SortExpression="Products" DataFormatString="{0} product" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left"/>
        <asp:BoundField DataField="Units" HeaderText="Units" SortExpression="Units"  DataFormatString="{0} units" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left"/>
        <asp:BoundField DataField="OrderStatusName" HeaderText="Current Status" SortExpression="OrderStatusName" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left"/>
        <asp:BoundField DataField="OrderStatusID" HeaderText="Orderstatusid" Visible="true" />
        <asp:BoundField DataField="OrderTracking_ID" HeaderText="TrackingNo" SortExpression="OrderTracking_ID" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left"/>
        <asp:TemplateField HeaderText="Action">
            <ItemTemplate>
                <%# GetViewOrderLink(Eval("OrderID").ToString(), Eval("OrderState").ToString())%>
            </ItemTemplate>
            <HeaderStyle HorizontalAlign="Left" />
            <ItemStyle HorizontalAlign="Left" />
        </asp:TemplateField>

        <asp:TemplateField HeaderText="Change Status" SortExpression="OrderStatusName">
            <ItemTemplate>
                <asp:DropDownList ID="OrderStatusDD" runat="server"
                    DataSourceID="OrdersStatuses" DataTextField="OrderStatusName" DataValueField="OrderStatusID" Visible="false">                                      
                </asp:DropDownList>
                <asp:SqlDataSource ID="OrdersStatuses" runat="server" 
                    ConnectionString="<%$ ConnectionStrings:SqlConn %>" 
                    SelectCommand="SELECT [OrderStatusID], [OrderStatusName] FROM [Orders_Statuses] where OrderStatusID = 2 or OrderStatusID = 8 ORDER BY [OrderStatusName]">
                </asp:SqlDataSource>
            </ItemTemplate>
        </asp:TemplateField>

        <asp:ButtonField ButtonType="Button" Text="Update status" Visible="false" HeaderText="Change Status" />
    </Columns>
</asp:GridView>

PS I have the onrowCommand set on the gridview to listen to button click in gridview

Answer 1

You can use the RowCreated event in the GridView as follows:

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        Button btn = (Button) e.Row.Cells[12].Controls[0];


        if(1==1)
        {

            btn.Visible = true;

        }
    }

Answer 2

You need to create RowCreated event for the gridview example

Before the GridView control can be rendered, a GridViewRow object must be created for each row in the control. The RowCreated event is raised when each row in the GridView control is created. This enables you to provide an event-handling method that performs a custom routine, such as adding custom content to a row, whenever this event occurs.

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
}

OR

<asp:GridView runat="server" ID="GV1" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:BoundField DataField="Age" HeaderText="Age" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button runat="server" Text="Reject" 
                Visible='<%# IsOverAgeLimit((Decimal)Eval("Age")) %>' 
                CommandName="Select"/>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

protected Boolean IsOverAgeLimit(Decimal Age) {
    return Age > 35M;
}

Reference example

Answer 3

((BoundField)grv_selec.Columns[1]).DataFormatString = "{0:N2}";