如何找到用户控件的名称

Question

我在名为 FirstUserControl 和 LastUserControl 的网页中重复了 2 次 UserControl。

当用户在FirstUserControl中改变Textbox的值时，我们如何识别用户当前正在FirstUserControl上工作。我的意思是如何在 UserControl 的更改事件中将 UserControl 的名称设为 "FirstUserControl"。

以下代码是示例。需要在此识别UserControl.Name

protected void txtAmount_TextChanged(object sender, EventArgs e)
{
    string ControlName = UserControl.Name;

    if(ControlName == "FirstUserControl")
        Response.Write ("You are working on FirstUserControl")

    if(ControlName == "LastUserControl")
        Response.Write ("You are working on LastUserControl")
}

Answer 1

sender 参数包含对对象的引用，表示触发此事件的 YourUserControl。

因此，您应该按如下方式修改代码以获得控件的父控件（或其他）：

protected void txtAmount_TextChanged(object sender, EventArgs e)
{
    Control control = (TextBox)sender;
    while (control as YourUserControl == null)
    {
        control = control.Parent;
    }
    
    string ControlName = ((YourUserControl)control).Name;

    if(ControlName == "FirstUserControl")
        Response.Write ("You are working on FirstUserControl")

    if(ControlName == "LastUserControl")
        Response.Write ("You are working on LastUserControl")
}

根据msdn：

Server-based ASP.NET Web Forms page and control events follow a standard .NET Framework pattern for event-handler methods.

All events pass two arguments: an object representing the object that raised the event, and an event object containing any event-specific information.

如何找到用户控件的名称

How to find the name of the UserControl

c#

asp.net

user-controls