ASP.NET Page执行顺序如：OnPreInit()、OnInit()-白红宇

ASP.NET Page执行顺序如：OnPreInit()、OnInit()

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发布时间：2019-06-15

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http://www.cnblogs.com/yeminglong/archive/2012/10/16/2725664.html

当页面进行回发时，如点击按钮，以上事件都会重新执行一次，这时的执行顺序为：

1. OnPreInit

2. OnInit

3. OnInitComplete

4. OnPreLoad

5. Page_Load

6. OnLoad

7. Button_Click

8. OnLoadComplete

9. OnPreRender

可以看到，Button_Click事件位于OnLoad之后执行，可以测试一下：

public partial class TestControls : System.Web.UI.Page    {        static int count = 0;        protected void Page_Load(object sender, EventArgs e)        {            Response.Write(count+ "Page_Load 
");            count++;        }        protected override void OnPreInit(EventArgs e)        {            base.OnPreInit(e);            Response.Write(count + "OnPreInit 
");            count++;        }        protected override void OnInit(EventArgs e)        {            base.OnInit(e);            Response.Write(count + "OnInit 
");            count++;        }        protected override void OnLoad(EventArgs e)        {            base.OnLoad(e);            Response.Write(count + "OnLoad 
");            count++;        }        protected override void OnPreLoad(EventArgs e)        {            base.OnPreLoad(e);            Response.Write(count + "OnPreLoad 
");            count++;        }        protected override void OnLoadComplete(EventArgs e)        {            base.OnLoadComplete(e);            Response.Write(count + "OnLoadComplete 
");            count++;        }        protected override void OnInitComplete(EventArgs e)        {            base.OnInitComplete(e);            Response.Write(count + "OnInitComplete 
");            count++;        }       protected override void OnUnload(EventArgs e)        {            base.OnUnload(e);        }        protected override void OnDataBinding(EventArgs e)        {            base.OnDataBinding(e);            Response.Write(count + "OnDataBinding 
");            count++;        }        protected override void OnPreRender(EventArgs e)        {            base.OnPreRender(e);            Response.Write(count + "OnPreRender 
");            count++;        }        protected void btnGraphics_Click(object sender, EventArgs e)        {            //Bitmap bmp = new Bitmap(10, 10);            //Graphics g = Graphics.FromImage(bmp);            Response.Write(count + "btnGraphics_Click 
");            count++;        }    }