AJAX回发未给出预期结果 [英] AJAX Postback did not give expected result

问题描述

大家好，

我在Ajax回发方面遇到问题.它在asp.net 4中工作正常，但在2.0上却无法运行.
这是我的代码:

Hi all,

I am having issues with ajax postback. It worked fine in asp.net 4 but not on 2.0.
This is my code:

$("#<%=registrationNumberTextBox.ClientID%>").blur(function() {
    if ($(this).val().length > 0) {
        $.ajax({
            type: "POST",
            url: "registration.aspx/GetAmountDue",
            data: "{'registrationNumber': '" + $(this).val() + "'}",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            async: true,
            cache: false,
            success: function(msg) {
                $("#<%=amountDueLiteral.ClientID%>").val(msg.d);
            },
            error: function(x, e) {
                alert("The call to the server side failed. " + x.responseText);
            }
        });
    } else { $("#<%=amountDueLiteral.ClientID%>").html('0.00'); }
});

<webmethod()>; _
Public Shared Function GetAmountDue(ByVal registrationNumber As String) As String
    If registrationNumber.Trim.Length > 0 Then
        If Student.IsValidRegistration(registrationNumber) Then
            Dim bi As Student.BasicInformation = Student.GetStudentByRegistrationNumber(registrationNumber)
            If bi.StudentId <> Nothing Then
                Dim result As String = String.Format("{0:n2}", bi.StudentAccount.Debit)
                Return result
            End If
        End If
    End If
    Return "0.00"
End Function

问题是，某些东西返回了结果，但未显示在amountDueLiteral上.我该怎么办?

The problem is that, the something returned a result but not displayed on the amountDueLiteral. What do I do?

推荐答案

(" ).blur(如果(

("#<%=registrationNumberTextBox.ClientID%>").blur(function() { if (

( this ).val().length > 0 ){

(this).val().length > 0) {

.ajax({ 类型:" ， 网址:" ， 数据:" +

.ajax({ type: "POST", url: "registration.aspx/GetAmountDue", data: "{'registrationNumber': '" +

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