/// <summary>

        /// 打开新的子窗体

        /// </summary>

        /// <param name="strName">窗体的类名</param>

        /// <param name="AssemblyName">窗体所在类库的名称</param>

        /// <param name="MdiParentForm">父窗体</param>

        public static void CreateForm(string strName, string AssemblyName, Form MdiParentForm)

        {

            int Index = strName.LastIndexOf(".");

            string FormName = strName.Substring();

            if (!ShowChildForm(FormName, MdiParentForm))

            {

                string path = AssemblyName;//项目的Assembly选项名称

                string name = strName; //类的名字

                Form doc = (Form)Assembly.Load(path).CreateInstance(name);

                doc.WindowState = FormWindowState.Maximized;

                doc.MdiParent = MdiParentForm;

                doc.Show();

            }

        }  

        /// <summary>

        /// 防止子窗体再度打开

        /// </summary>

        /// <param name="p_ChildrenFormText"></param>

        /// <param name="MdiParentForm"></param>

        /// <returns></returns>

        public static bool ShowChildForm(string p_ChildrenFormText, Form MdiParentForm)

        {

            int i;

            //依次检测当前窗体的子窗体

            for (i = ; i < MdiParentForm.MdiChildren.Length; i++)

            {

                //判断当前子窗体的Text属性值是否与传入的字符串值相同

                if (MdiParentForm.MdiChildren.Name == p_ChildrenFormText)

                {

                    //如果值相同则表示此子窗体为想要调用的子窗体，激活此子窗体并返回true值

                    MdiParentForm.MdiChildren.Activate();

                    return true;

                }

            }

            //如果没有相同的值则表示要调用的子窗体还没有被打开，返回false值

            return false;

        }