Asp.Net不包含buttonClick的定义吗？
[英]Asp.Net does not contain a definition for buttonClick?
问题描述
I am attempting to build a program on visual studio asp.net but whenever I try to click a button with an OnClick event I get the following error: 
我试图在Visual Studio asp.net上构建程序，但是每当尝试单击带有OnClick事件的按钮时，都会出现以下错误：
"CS1061: 'ASP.test_aspx' does not contain a definition for 'buttonClick' and no extension method 'buttonClick' accepting a first argument of type 'ASP.test_aspx' could be found (are you missing a using directive or an assembly reference?)" “ CS1061：'ASP.test_aspx'不包含'buttonClick'的定义，并且找不到扩展方法'buttonClick'接受类型为'ASP.test_aspx'的第一个参数（您是否缺少using指令或程序集引用？ ）”
Here is my HTML for reference: 这是我的HTML供参考：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="MRAApplication.test" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button id="b1" Text="Submit" runat="server" OnClick="buttonClick" />
<asp:TextBox id="txt1" runat="server" />
</div>
</form>
</body>
</html>
and here is my code behind: 这是我的代码背后：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace MRAApplication
{
public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
void buttonClick(Object sender, EventArgs e)
{
txt1.Text = "Text";
}
}
}
Please keep explanations as simple as possible as I am new to coding. 请保持解释尽可能简单，因为我是编码新手。 Thank you for any and all help. 感谢您提供的所有帮助。 :) :)
3 个解决方案
解决方案1
14 已采纳 2014-08-28 14:28:38
You need to declare your event handler as protected: 您需要将事件处理程序声明为受保护的：
protected void buttonClick(Object sender, EventArgs e)
{
txt1.Text = "Text";
}
The markup is essentially a class that inherits from the code behind. 标记本质上是一个从后面的代码继承的类。 In order for members to be accessible, they need to be protected or public. 为了使成员可以访问，需要对其进行保护或公开。
解决方案2
3 2014-08-28 14:28:57
You have to make it at least protected: 您必须使其至少受到保护：
protected void buttonClick(Object sender, EventArgs e)
{
txt1.Text = "Text";
}
The default access for everything in C# is "the most restricted access you could declare for that member", so private for a method. C＃中所有内容的默认访问权限是“您可以为该成员声明的最严格的访问权限”，因此对于方法来说是private的。
Since the aspx is a child class of your codebehind class( Inherits ) any method that you want to access from the aspx must be declared as protected or public (at least in C#, VB.NET has Handles ). 由于aspx是您的codebehind类（ Inherits ）的子类，因此您要从aspx访问的任何方法都必须声明为protected或public （至少在C＃中，VB.NET具有Handles ）。
Read: 读：
解决方案3
2 2014-08-28 14:38:23
You need to declare your event handler, you can do that a couple ways: 您需要声明您的事件处理程序，可以通过以下几种方法进行操作：
protected void Page_Load(object sender, EventArgs e)
{
btnNote.Click += new EventHandler(btnNote_Click);
}
void btnAddNote_Click(object sender, EventArgs e)
{
// Do Stuff.
}
So as you can see by declaring the event at Page Load , you can use the raw void like you have above. 因此，通过在Page Load中声明事件可以看到，可以像上面一样使用原始void 。 Otherwise you'll need declare it in a protected . 否则，您需要在protected声明它。
protected void btnAddNote_Click(object sender, EventArgs e)
{
// Do Stuff.
}
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