的FindControl在RoleGroup在LoginView [英] FindControl in a RoleGroup in a LoginView

问题描述

我似乎无法找到一个登录视图控件。

I can't seem to find a control in a login view.

在ASPX是：

<asp:LoginView ID="SuperUserLV" runat="server">
    <RoleGroups>
            <asp:RoleGroup Roles="SuperUser">
                    <ContentTemplate>		
                            <asp:CheckBox ID="Active" runat="server" /><br />
                            <asp:CheckBox ID="RequireValidaton" runat="server" />
    		</ContentTemplate>
    	</asp:RoleGroup>
    </RoleGroups>
</asp:LoginView>

而code后面的是：

And the code behind is:

if (Context.User.IsInRole("SuperUser"))
{
    CheckBox active = (CheckBox) SuperUserLV.FindControl("Active");
    if (active != null)
    {
    	active.Checked = this.databaseObject.Active;
    }

    CheckBox require = (CheckBox) SuperUserLV.FindControl("RequireValidaton");
    if (require != null)
    {
    	require.Checked = this.databaseObject.RequiresValidation;
    }
}

在右角色的用户，我可以看到的复选框，但code后面不填充其中，的FindControl的结果为空。

With a user in the right role, I can see the checkboxes, but the code behind doesn't populate them, the result of the findcontrol is null.

我在想什么？谢谢你。

修改：看起来像我的问题是，当我做了 .FindControl 一个LoginView没有渲染到屏幕上，并返回null 。把我的code上的一个按钮，把它的页面呈现给它的工作，我希望在屏幕后。

Edit: Looks like my issue was when I am doing the .FindControl the loginview hasn't rendered to the screen and is returning null. Putting my code on a button and calling it after the page has rendered to the screen it works as I would expect.

编辑2 ：好像把code最好的地方是 SuperUserLV_ViewChanged

Edit 2: Seems the best place to put the code was SuperUserLV_ViewChanged

推荐答案

内置FindControl方法只搜索直接的子控件。你需要编写方法的递归版本来搜索所有后代。以下是可能需要一些优化一个未经考验的例子：

The built-in FindControl method only searches the direct child controls. You'll need to write a recursive version of the method to search all descendants. Following is an untested example that likely needs some optimization:

public Control RecursiveFindControl(Control parent, string idToFind)
{
    for each (Control child in parent.ChildControls)
    {
        if (child.ID == idToFind)
        {
            return child;
        }
        else
        {
            Control control = RecursiveFindControl(child, idToFind);
            if (control != null)
            {
                return control;
            }
        }
    }
    return null;
}

这篇关于的FindControl在RoleGroup在LoginView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！