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  • 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

    2.构造函数

    (1)CommandEventArgs(CommandEventArgs)——Initializes a new instance of the CommandEventArgs class with another CommandEventArgs object.

    语法:

    public CommandEventArgs(CommandEventArgs e )

    (2)CommandEventArgs(String, Object)——Initializes a new instance of the 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

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  • 原文地址:https://www.cnblogs.com/January/p/2221715.html
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