winforms - 禁用工具条菜单

Question

我正在尝试 Enable = false to menustrip .. 但是代码正在执行但无法禁用菜单

        MenuStrip ms = (MenuStrip)frm_MDI.objMdi.Controls["msMainMenu"];
        foreach (ToolStripMenuItem tmm in ms.Items)
        {
            tmm.Enabled = false;
        }

Answer 1

添加后 objMdi = this; 加载事件。它工作正常。

    private void frm_MDI_Load_1(object sender, EventArgs e)
    {
        objMdi = this;
    }