阻止GridView的RowDataBound事件响应

由于很多页面中有GridView控件，在某些情况下不想让RowDataBound事件进行事件响应，也就是阻止事件响应函数的执行，如果一个页面一个页面地去gridView.RowDataBound-=OnRowDataBound改动起来将非常麻烦。

还好这些页面都是MasterPage的嵌套页面，因此可以在MasterPage的cs文件中用FindControlRecursive找到GridView

/// <summary> /// 相当于FindControl,同时适用于Page和MasterPage /// </summary> /// <param name="root">开始查找点</param> /// <param name="id">要查找的控件ID</param> /// <returns></returns> public static Control FindControlRecursive(Control root, string id) { if (root.ID == id) return root; foreach (Control Ctl in root.Controls) { Control FoundCtl = FindControlRecursive(Ctl, id); if (FoundCtl != null) return FoundCtl; } return null; }

 

然后通过反射，找到继承自System.ComponentModel.Component的Events

protected EventHandlerList Events 方法是： Type t = gridView.GetType(); PropertyInfo piEvents = t.GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);

 

要用EventHandlerList的public void RemoveHandler(object key, Delegate value);删除事件响应，

需要先找到key

FieldInfo fiEventKey = t.GetField("EventRowDataBound", BindingFlags.Static | BindingFlags.NonPublic); 

取delegates

Delegate d = ehl[fiEventKey.GetValue(null)]; 

最后删除

                    if (d != null)
                    {
                        foreach (Delegate temp in d.GetInvocationList())
                        {
                            ehl.RemoveHandler(fiEventKey.GetValue(null), temp);
                        }
                    } 

完整的代码如下：

                    // 去掉GridView的RowDataBound事件响应
                    Type t = gridView.GetType();
                    PropertyInfo piEvents = t.GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
                    EventHandlerList ehl = (EventHandlerList)piEvents.GetValue(gridView, null);
                    FieldInfo fiEventKey = t.GetField("EventRowDataBound", BindingFlags.Static | BindingFlags.NonPublic);
                    Delegate d = ehl[fiEventKey.GetValue(null)];
                    if (d != null)
                    {
                        foreach (Delegate temp in d.GetInvocationList())
                        {
                            ehl.RemoveHandler(fiEventKey.GetValue(null), temp);
                        }
                    }