我想做的是从 javascript 调用 vb.net 函数
这是我的html代码。
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Untitled
Page
</title>
<script
src="jquery.js"></script>
<script
type="text/javascript">
$(function(){
$("button").click(showVbHelloWorld)
function
showVbHelloWorld()
{
window.external.showVbHelloWorld();
}
})
</script>
</head>
<body>
<button>A</button>
</body>
</html>
这是我的 vb.net 代码
Imports System
Imports System.Windows.Forms
Imports System.Security.Permissions
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")>
<System.Runtime.InteropServices.ComVisibleAttribute(True)>
<Microsoft.VisualBasic.ComClass()>
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
Me.WebBrowser1.ObjectForScripting = Me
End Sub
Public Sub showVbHelloWorld()
MsgBox("Hello")
End Sub
End Class
仍然在按钮点击我得到错误
未捕获的类型错误:对象 # 没有方法“showVbHelloWorld”
抱歉我的代码格式不均匀...我是 stackoverflow 的新手...
最佳答案
这是一个显示如何操作的链接:Call VB method from JavaScript
它基本上说有两种方式，Ajax 或 Postback。这是回传方法:
aspx文件:
<script type="text/javascript">
<!--
function callServersideFunction()
{
var someValueToPass = 'Hello server';
__doPostBack('CustomPostBack', someValueToPass);
}
// -->
</script>
aspx.vb 文件:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Insure that the __doPostBack() JavaScript method is created...
Me.ClientScript.GetPostBackEventReference(Me, String.Empty)
If Me.IsPostBack Then
Dim eventTarget As String
Dim eventArgument As String
If ( (Me.Request("__EVENTTARGET") Is Nothing)
eventTarget = String.Empty
Else
eventTarget = Me.Request("__EVENTTARGET"))
If ( (Me.Request("__EVENTARGUMENT") Is Nothing)
eventArgument = String.Empty
Else
eventArgument = Me.Request("__EVENTARGUMENT"))
If eventTarget = "CustomPostBack" Then
Dim valuePassed As String = eventArgument
' Call your VB method here...
End If
End If
End Sub
关于javascript - 从 javascript 调用 vb.net 函数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17122683/