将变量从VB函数传递到客户端javascript

Question

您好，我正在使用此 Page.ClientScript.RegisterStartupScript() 从后面的 vb 代码调用 javascript 函数，这对我来说很好用 我的问题是如何将变量从后面的代码发送到 javascript 函数这是什么到目前为止我已经尝试过：

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
   Handles Me.LoadComplete
    Dim Myname As String = "myName"
    Dim cstype As Type = Me.GetType()
    Page.ClientScript.RegisterStartupScript(cstype, "MyKey", "hello(Myname);",
  True)

End Sub 

javascript：

   <script type="text/javascript">
    function hello(name) {
        alert("hello world from javascript " + name)
    }
</script>

谢谢...

Answer 1

你必须使用正确的引号来传递字符串：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
   Handles Me.LoadComplete
    Dim Myname As String = "myName"
    Dim cstype As Type = Me.GetType()
    Page.ClientScript.RegisterStartupScript(cstype, "MyKey", "hello('" & Myname & "');",
  True)

End Sub 

注意变量名的单引号。

在客户端和服务器端代码之间双向传递数据的另一种方式是隐藏字段，例如

<asp:HiddenField ID="xhidMyname" runat="server" />

或

<input type="hidden" id="xhidMyname" runat="server" />

这个字段可以通过它的“value”属性在客户端和服务器端访问。

Answer 2

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
   Handles Me.LoadComplete
    Dim Myname As String = "myName"
    Dim cstype As Type = Me.GetType()
    Page.ClientScript.RegisterStartupScript(cstype, "MyKey", "hello('"&Myname&"');",
  True)

End Sub