GridView事件DataBinding,DataBound,RowCreated,RowDataBound区别及执行顺序分析

严格的说，DataBinding,DataBound并不是GridView特有的事件，其他的控件诸如ListBox等也有DataBinding,DataBound事件。

DataBinding事件
MSDN解释：Occurs when the server control binds to a data source.
This event notifies the server control to perform any data-binding logic that has been written for it.
译为：该事件当服务器控件绑定数据时发生。

DataBound事件
MSDN解释：Occurs after the server control binds to a data source.
This event notifies the server control that any data binding logic written for it has completed.
译为：该事件当服务器控件完成数据绑定后发生。

RowCreated事件
MSDN解释：Occurs when a row is created in a GridView control.
译为：当GridView的行被创建时发生。

 

RowDataBound事件
MSDN解释：Occurs when a data row is bound to data in a GridView control.
译为：当GridView的行被绑定数据时发生。

四个事件的执行顺序：
假定GridView有3行数据

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aspx代码

<asp:GridView ID="GridViewMain" runat="server" AutoGenerateColumns="False" OnDataBinding="GridViewMain_DataBinding" OnDataBound="GridViewMain_DataBound" OnRowCreated="GridViewMain_RowCreated" OnRowDataBound="GridViewMain_RowDataBound" >

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cs代码（只含事件头）

protected void GridViewMain_DataBinding(object sender,EventArgs e) { } protected void GridViewMain_DataBound (object sender,EventArgs e) { } protected void GridViewMain_RowCreated(object sender, GridViewRowEventArgs e) { } protected void GridViewMain_RowDataBound(object sender, GridViewRowEventArgs e) { }

 

发生次序是：
1. DataBinding
2. RowCreated
3. RowDataBound
4. RowCreated
5. RowDataBound
6. RowCreated
7. RowDataBound
8. DataBound

GridView取得数据有3条，因此Row的相关事件执行3次。

 

另外，从字面本身也可知事件之间的区别

比如，DataBound,DataBinding两个事件，单词Bound是Bind的过去式，即DataBound是绑定事件完成后发生的。

还有诸如RowDeleted,RowDeleting,都可以从词义本身的差别加以区分。