problem in gridview control of user control

My problem is I am setting the datasource from parent page.But if I set disable to certain columns of gridview the event of the controls inside those disabled column template gets fired. Like I have a checkbox in one column, if disable that column from parent page while data binding the check_checked event is being fired. here my code- user control aspx

<asp:TemplateField HeaderText="Exclude Null" ItemStyle-Width="50px">
                    <HeaderTemplate>
                        Exclude Null
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:CheckBox runat="server" ID="chkExNull" OnCheckedChanged="chkExNull_OnCheckedChanged"
                            AutoPostBack="true" />
                    </ItemTemplate>
                    <ItemStyle HorizontalAlign="left" VerticalAlign="Top" />
                    <HeaderStyle HorizontalAlign="left" VerticalAlign="Top" />
                </asp:TemplateField>

.cs file of parent

GridView gvCondition = (GridView)ucCondition.FindControl("gvCondition");
    gvCondition.DataSource = ConditionFieldCollection;
    gvCondition.Columns[5].Visible = false;
    gvCondition.Columns[6].Visible = false;
    gvCondition.Columns[7].Visible = false;
    gv开发者_如何学CCondition.Columns[8].Visible = false;
    gvCondition.DataBind();

What should I do, and is there any other way through which I can hide some of the columns of grid view control of user control??

Before your DataBind(). write this:

gvCondition.DataBound += new EventHandler(gvwCondition_DataBound);

and write in that method, the code to hide the columns.

Hope that helps.