如何在 ASCX 用户控件中设置控件焦点？

Question

How to set control focus on Asp.Net user control (ascx file)?

Answer 1

Property example:

CS file for the ASCX:

public partial class MyAscxControl : System.Web.UI.UserControl
{
    // add a property to the ascx control  
    public WebControl MyTextbox 
    { 
        get
        {
            return txtMyTextbox; // the control's id on your ASCX page
        } 
    }
}

CS file for the page that contains the ASCX control:

protected void Page_Load(object sender, EventArgs e)
{
    yourAscxControlId.MyTextBox.Focus();
}

Answer 2

Expose a property / control from user control. Access it on parent page and set call .Focus() function.

eg

((TextBox)userControl.FindControl("TextBox1")).Focus();

Answer 3

或只是TextBox1.Focus（）（如果您想在后面的控制代码中使用它）:)

Answer 4

如果您想从客户端...

$("#id").focus();

Answer 5

I was the same problem creating an User Control ascx. My original code was in the page and worked properly, but when I cut the code to use it since my User Control, the property SetFocus("...") it's not available to use it in the same way.

SetFocus("MyTextBox")

I needed to reference the current page to find the TextBox element:

MyBase.Page.SetFocus("MyTextBox")