如何使用VB.NET和AJAX调用.NET页面方法

Dim xmlhttp As New XMLHttpRequest()
xmlhttp.open("POST", "YourPage.aspx/YourMethod", True)
xmlhttp.setRequestHeader("Content-Type", "application/json; charset=utf-8")
xmlhttp.onreadystatechange = AddressOf HandleResponse
xmlhttp.send()

<System.Web.Services.WebMethod>
Public Shared Function YourMethod() As String
    ' 在这里编写你的方法逻辑
    Return "Hello from YourMethod!"
End Function

function HandleResponse() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
        var response = xmlhttp.responseText;
        // 在这里处理服务器的响应
        alert(response);
    }
}