Javascript 如何在vb.net中从aspx.vb页面调用webmethod

我想做的是，从aspx.vb调用WebMethod，下面是我的WebMethod语法，它在Default.aspx.vb中

<System.Web.Services.WebMethod()> _
<ScriptMethod(UseHttpGet:=True, ResponseFormat:=ResponseFormat.Json)> _
Public Shared Function dat( _
ByVal Id As Integer) As List(Of items)
    Dim eve As New List(Of items)()
    eve = (From row In getItems(Id).Rows
           Select New items With {
                                .Name = row("Name").ToString(),
                                .Description = row("Description").ToString(),
                                .ItemPic_url = row("ItemPic_url").ToString()}).ToList()
    Return eve
End Function

下面是我调用web方法的jquery函数：

注意：我的Jquery函数放在母版页中，我从startup Default.aspx页面调用它

问题：我没有输入我的web方法。通过尝试从浏览器调试。我得到的错误如下所述：

Unknown web method dat. Parameter name: methodName at System.Web.Script.Services.WebServiceData.GetMethodData(String methodName) at System.Web.Handlers.ScriptModule.OnPostAcquireRequestState(Object sender, EventArgs eventArgs) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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我正在做的是从aspx.vb调用WebMethod

下面是我的WebMethod语法，它位于Default.aspx.vb中：

<System.Web.Services.WebMethod()> _
<ScriptMethod(UseHttpGet:=True, ResponseFormat:=ResponseFormat.Json)> _

请看线。也许这对你有帮助。

<System.Web.Services.WebMethod()> _
<ScriptMethod(UseHttpGet:=True, ResponseFormat:=ResponseFormat.Json)> _

Imports System.Web.Services  
Imports System.Web.Script.Services