Form fm = (Form)Assembly.Load(path).CreateInstance(name)获取Form是null

[daigua1987]

private void Item_Click(object sender, EventArgs e)
        {
            ToolStripMenuItem item = sender as ToolStripMenuItem;
            this.Cursor = Cursors.WaitCursor;
            string path = "FastERP";//项目的Assembly选项名称
            string name = "FastERP.IU.UUnit"; //类的名字
            Form fm = (Form)Assembly.Load(path).CreateInstance(name);
             fm.MdiParent = this.ParentForm;
            //panel3.Controls.Add(fm);
            fm.Show();
            fm.Dock = DockStyle.Fill;
            this.Cursor = Cursors.Default;
        }

获取代码

namespace FastERP.UI
{
    public partial class UUnit : Form
    {
        public UUnit()
        {
            InitializeComponent();
        }
    }
}

UUnit的form代码

[morliz子轩]

string path = "FastERP";//项目的Assembly选项名称
string name = ".UUnit"; //类的名字

//实际上它就是：
string frm Path = Assembly.GetExecutingAssembly().GetName().Name + ".UUnit";

//获取当前程序集
Assembly assembly = Assembly.GetExecutingAssembly();
Type objType = assembly.GetType(frmPath);

if (objType != null)
Form frm = (Form)Activator.CreateInstance(objType);

//最后再加载到mainForm
……

很明显，用法错了。 Assembly.Load("程序集名称").CreateInstance("命名空间.类") 要先获取当前程序集，再进行实例化。

[daigua1987]

谢谢 自己解决了 把 this.Cursor = Cursors.WaitCursor; 这段删除后就可以获取到了