我正在开发Visual Studio Web开发人员的一些.NET代码,但我遇到了问题。当我双击设计视图中的按钮而不是加载子过程时,它所做的只是突出显示:<asp:Button ID="btnEnter" runat="server" Text="Enter" onclick="btnEnter_Click" />
当我尝试运行它只是为了看看会发生什么,我收到此错误:
Line 8: <asp:Button ID="btnEnter" runat="server"
Compiler Error Message: BC30456: 'btnEnter_Click' is not a member of 'ASP.default_aspx'.
如果我删除onclick="btnEnter_Click"
并运行它,它就可以了。无论哪种方式,当我双击按钮/元素时,它不应该为我创建一个类似的子程序吗?
Protected Sub TextBox1_TextChanged(sender As Object, e As EventArgs)
End Sub
我尝试输入那个manaully,但关键字不会变成蓝色或任何颜色,当我运行它时,它只是显示为webform上的文本与我的其他元素。以下是我到目前为止的所有内容:
<%@ Page Title="Home Page" Language="VB"%>
<form id="form1" runat="server">
<asp:Label ID="Label1" runat="server" Text="Enter a person's name below"></asp:Label>
<p>
<asp:TextBox ID="txtStudentName" runat="server"></asp:TextBox>
</p>
<p>
<asp:Button ID="btnEnter" runat="server"
Text="Enter" onclick="btnEnter_Click" />
</p>
<p>
<asp:Button ID="btnDisplay" runat="server" Text="Display all and exit" />
</p>
<p>
<asp:Label ID="lbl2" runat="server" Text=" "></asp:Label>
</p>
<p>
<asp:Label ID="lbl3" runat="server" Text=" "></asp:Label>
</p>
<p>
<asp:Label ID="lbl4" runat="server" Text=" "></asp:Label>
</p>
<p>
<asp:Label ID="lbl5" runat="server" Text=" "></asp:Label>
</p>
</form>
编辑:
当我在default.aspx.vb文件中输入我的代码时,它会突出显示关键字等,但它不能引用我在设计视图中创建的元素。
Partial Class _Default 继承System.Web.UI.Page
结束班
Class Lab1
Protected Sub TextBox1_TextChanged(sender As Object, e As EventArgs)
End Sub
Public Const length As Integer = 3
Shared counter2 As Integer = 0
Public Shared studentList As String() = New String(2) {}
Protected Sub btnEnter_Click(sender As Object, e As EventArgs)
Label1.Text = "Enter a person's name"
Dim studentName As [String] = txtStudentName.Text
If studentList.Length <= length Then
If txtStudentName.Text <> "" Then
Dim match As [Boolean] = True
Dim i As Integer = 0
While counter2 >= i
If studentList(i) IsNot Nothing Then
If studentList(i).ToUpper() = txtStudentName.Text.ToUpper() Then
match = False
Label1.Text = "This name has already been used"
End If
End If
i += 1
End While
If match = True Then
studentList(counter2) = txtStudentName.Text
counter2 += 1
End If
End If
End If
End Sub
End Class
答案 0 :(得分:2)
您的Page
声明似乎表明您使用的是inline
样式:
<%@ Page Title="Home Page" Language="VB"%>
这意味着您的代码/ {应该 aspx
文件本身位于script runat="server"
代码中
<%@ Page Language="VB" %>
<!DOCTYPE html>
<script runat="server">
Protected Sub Button1_Click(sender As Object, e As EventArgs)
'Do something
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</div>
</form>
</body>
</html>
但是,您的其他代码表明您似乎想要使用code-behind
模型,其中包含.vb
个文件(例如foo.aspx.vb
)
Page
对于网站声明如此(对于网络应用,它会说CodeBehind="foo.aspx.vb"
):
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="foo.aspx.vb" Inherits="foo" %>
foo.asp.vb
个文件Class Lab1
是为了什么...... foo.aspx.vb
:
Partial Class foo
Inherits System.Web.UI.Page
Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
'Do something
End Sub
End Class
“修复”适合您:
inline
或code-behind
Page
inline
,您的代码将在aspx文件中code-behind
,您的代码将存在,并且应该封装在页面的Class file
内。
Page
声明实际上是这样说的:
CodeFile="foo.aspx.vb"
是代码Inherits="foo"
是文件Partial Class
)Partial Class foo
答案 1 :(得分:0)
试试这个
Private Sub btnEnter_Click(sender As Object, e As System.EventArgs) Handles btnEnter.Click
End Sub
此处, btnEnter_Click 是您的事件名称,并在过程声明的末尾使用句柄关键字,以使其处理由对象变量引发的事件