CommandEventArgs类学习

1.CommandEvent类的作用——为Command事件提供数据

语法（C#）Public class CommandEventArgs: EventArgs;从中可以看出该类继承了EventArgs类

2.构造函数

（1）CommandEventArgs(CommandEventArgs)——CommandEventArgs object.

语法：

public CommandEventArgs(CommandEventArgs e )

（2）CommandEventArgs(String, Object)——CommandEventArgs class with the specified command name and argument.

语法：

public CommandEventArgs(string commandName,Object argument)

 

3.属性

 

(1)CommandArgument—— Gets the argument for the command.

 

(2)CommandName——Gets the name of the command.

 

<asp:LinkButton ID="ActiveButton" Text="Active" CommandName="show" CommandArgument="0" OnCommand="Select_Command" runat="server"/>

 

protected void Select_Command(object sender, CommandEventArgs e)
    {

        ListDataSource.SelectParameters["IsComplete"].DefaultValue =
            e.CommandArgument.ToString();
if (e.CommandName == "show")
            SearchText.Text = "";
        ViewState["CurrentTab"] = e.CommandArgument;
    }

 

object sender,在以上代码中sender指代的是——System.Web.UI.WebControls.LinkButton

 

CommandEventArgs e,e为CommandEventArgs的一个实例，用e.CommandArgument和e.CommandName来获取该对象的属性