使用TextBox的Usercontrol动作事件

本文关键字:事件 Usercontrol TextBox 使用 | 更新日期: 2023-09-27 18:09:54

我是asp.net的新手,我的问题是我有一个文本框和用户控制按钮默认。点击按钮后,我需要改变文本框的文本值(从用户控件的一些默认值)。

这可能吗?如果是,我需要在哪里写代码?

违约。aspx

<%@ Register Src="Text.ascx" TagName="Edit" TagPrefix="uc1" %> 
<asp:TextBox ID="TextBox1" runat="server" Width="262px"></asp:TextBox>
<uc1:Edit Id="Edit2" runat="server" /></td>

Usercontrol - button

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Text.ascx.cs" Inherits="WebApplication4.WebUserControl1" %>
<asp:Button ID="Button1" runat="server" Text="Edit " OnClientClick="return confirm('Are you certain you want to Navigate?');" Width="341px" onclick="Button1_Click" />

如何从usercontrol中分组或触发(文本框值更改)?

使用TextBox的Usercontrol动作事件

从您的用户控件开始:

<asp:Button ID="Button1" runat="server" Text="Edit " 
    OnClientClick="return confirm('Are you certain you want to Navigate?');" 
    Width="341px" onclick="Button1_Click"/>

在后面的代码中,使用它来创建一个自定义事件,该事件在按钮'c click

上触发
using System;
using System.Web.UI;
namespace TestApplication
{
    public partial class Edit : UserControl
    {
        public string DefaultValue { get; set; }
        protected void Page_Load(object sender, EventArgs e)
        {
        }
        private static object EditClickKey = new object();
        public delegate void EditEventHandler(object sender, EditEventArgs e);
        public event EditEventHandler EditClick
        {
            add
            {
                Events.AddHandler(EditClickKey, value);
            }
            remove
            {
                Events.RemoveHandler(EditClickKey, value);
            }
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            OnEditClick(new EditEventArgs(DefaultValue));
        }
        protected virtual void OnEditClick(EditEventArgs e)
        {
            var handler = (EditEventHandler)Events[EditClickKey];
            if (handler != null)
                handler(this, e);
        }
        public class EditEventArgs : EventArgs
        {
            private string data;
            private EditEventArgs()
            {
            }
            public EditEventArgs(string data)
            {
                this.data = data;
            }
            public string Data
            {
                get 
                {
                    return data;
                }
            }
        }
    }
}

"违约。页将包含您的新自定义事件的事件处理程序。
标记:

<asp:TextBox ID="TextBox1" runat="server" Width="262px"></asp:TextBox>
    <uc1:Edit ID="Edit1" runat="server" OnEditClick="EditClick_OnEditClick" DefaultValue="default" />


背后的代码:

protected void EditClick_OnEditClick(object sender, TestApplication.Edit.EditEventArgs e)
        {
            TextBox1.Text = e.Data;
        }

Button1Button1_Click事件中,您可以使用Page.FindControl()方法获得对TextBox的引用,如下所示:

protected void Button1_Click(...)
{
     TextBox txtBox = (TextBox)this.Page.FindControl("TextBox1");
     if(txtBox != null)
        txtBox.Text = "Set some text value";
}