EXT GridPanel button 按钮 事件 方法 DirectMethod

C# 代码      

       //首页
            Ext.Net.Button btnFirst = new Ext.Net.Button();
            btnFirst.Icon = Icon.ControlStartBlue;
            btnFirst.ID = "btnFirst";
            btnFirst.Listeners.Click.Handler = "Ext.net.Mask.show({ msg : '数据加载中...' });App.direct.btnFirst_Click();";
            toolbar.Items.Add(btnFirst);

[DirectMethod]
public void btnFirst_Click()
{

X.GetCmp<NumberField>("txtPageIndex").SetValue(1);
Paging(1, pageSize);
X.Mask.Hide();
//X.Msg.Alert("信息提示", "btnFirst_Click").Show();
}