当我单击Level1toolstripmenu时，表单2将显示并且表单3必须关闭，但表单3不会关闭而表单2显示。如何编辑此代码？ [英] When I Click Level1toolstripmenu, The Form 2 Will Show And Form 3 Must Close, But The Form 3 Not Closing While Form 2 Show Up. How To Edit This Code?

问题描述

private void level1ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            Form3 f3 = new Form3();
            f2.MdiParent = this;
            f3.MdiParent = this;
            f2.Show();                                                   
            f3.Close();                                  
        }

/big>pre>

推荐答案

使用以下代码打开Form2，其他人应该关闭

使用system.Reflection添加命名空间;

Use the below code its for Form2 to be open and others should be closed
add namespace using system.Reflection;

private void level1ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //For Form2 Menu Item Click
            Assembly frmAssembly = Assembly.LoadFile(Application.ExecutablePath);
            foreach (Type type in frmAssembly.GetTypes())
            {
                if (type.BaseType == typeof(Form))
                {
                    if (type.Name == "Form2")
                    {
                            Form frmShow = (Form)frmAssembly.CreateInstance(type.ToString());
                            foreach (Form form in this.MdiChildren)
                            {
                                form.Close();
                            }
                            frmShow.MdiParent = this;
                            frmShow.StartPosition = FormStartPosition.CenterScreen;
                            frmShow.Show();
                    }
                }
            }                     
        }

这篇关于当我单击Level1toolstripmenu时，表单2将显示并且表单3必须关闭，但表单3不会关闭而表单2显示。如何编辑此代码？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！