[英]Calling vb.net function from javascript
我想做的是從javascript調用vb.net函數
這是我的HTML代碼。
<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>
這是我的vb.net代碼
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
仍然在按鈕上單擊im geting錯誤
未捕獲的TypeError:對象#沒有方法'showVbHelloWorld'
抱歉我的代碼格式不均勻...我是stackoverflow的新手......
這是一個顯示如何操作的鏈接: 從JavaScript調用VB方法
它基本上說有兩種方式,Ajax或Postback。 這是回發方法:
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
你必須發表這個聲明
Me.WebBrowser1.ObjectForScripting = Me
在form_load
Private Sub form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load
Me.WebBrowser1.ObjectForScripting = Me
End Sub
看到這個網站: - http://www.codeproject.com/Articles/35373/VB-NET-C-and-JavaScript-communication
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