Question

我正在尝试与Json一起使用jQuery Ajax调用来调用web服务，这是一个传递并调用另一个webservice。如果我不使用ajax，它可以直接作为对后端服务的ajax调用，但不能作为传递服务的ajax调用。我的问题是如何让ajax传递web服务到webservice工作？

这是我到目前为止的代码：

[ServiceContract]
public interface IService1
{

    [OperationContract]
    [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
    string GetData(int value);
    }

在webservice后面：

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class Service1 : IService1
{
    public string GetData(int value)
    {
        return string.Format("You entered: {0}", value);
    }
}

传递服务：

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class Service2 : IService1
{
    public string GetData(int value)
    {
       var service = new ServiceReference1.Service1Client("clientContractStuff");
       var testString = service.GetData(value);
       return testString;
    }
}

页面代码背后：

public partial class WebUserControl1 : System.Web.UI.UserControl
{
    protected void CodeBehindWcf(object sender, EventArgs e)
    {
        var service = new ServiceReference1.Service1Client("clientContractStuff");
        var testString = service.GetData(5);
        TextBox1.Text = testString;
    }

    protected void CodeBehindWcfUsingService2(object sender, EventArgs e)
    {
        var service = new Service2();
        var testString = service.GetData(5);
        TextBox2.Text = testString;
    }
}

Javascript和Html：

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs"
    Inherits="WcfService1.WebUserControl1" %>
<script type="text/javascript" src="Scripts/jquery-1.4.4-vsdoc.js"></script>
<script type="text/javascript" src="Scripts/jquery-1.4.4.min.js"></script>
<script type="text/javascript">
    function ajaxService2() {
        serviceUrl = "Service2.svc/GetData";
        $.ajax({
            type: "POST",
            url: serviceUrl,
            data: "{\"value\":\"1\"}",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (transport) {
                var string = transport;
                $("#Text2").val(string);
            }
        });
    }

    function ajaxService1() {
        serviceUrl = "Service1.svc/GetData";
        $.ajax({
            type: "POST",
            url: serviceUrl,
            data: "{\"value\":\"2\"}",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (transport) {
                var string = transport;
                $("#Text1").val(string);
            }
        });
    }
</script>
<p>
    <input id="Button1" type="button" value="Ajax call service 1" onclick="ajaxService1()" />
    <input id="Text1" name="Text1" type="text" /></p>
<p>
    <input id="Button2" type="button" value="Ajax call service 2" onclick="ajaxService2()" />
    <input id="Text2" name="Text2" type="text" /></p>
<p>
    <asp:Button ID="Button3" runat="server" Text="Code Behind" OnClick="CodeBehindWcf" />
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></p>
<p>
    <asp:Button ID="Button4" runat="server" Text="Code Behind Use Service 2" OnClick="CodeBehindWcfUsingService2" />
    <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox></p>

除Button 2和ajaxService2函数外，一切正常。这会抛出一个错误：'远程服务器返回了一个意外的响应：（400）Bad Request。'

Answer 1

为了使用Ajax，webhttpbinding必须用于传递web服务的端点，我假设它也将用于后端服务。

查看'Service References \ Reference.cs'中的自动生成的服务参考代码：

public interface IService1 {

    [System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/IService1/GetData", ReplyAction="http://tempuri.org/IService1/GetDataResponse")]
    string GetData(int value);
}

很容易看到它在SOAP下生成代码而不是REST。由于webhttpbinding是REST绑定，因此无法正常工作。我改变了后端服务以使用basichttpbinding，一切正常。

Answer 2

在Service2.GetData中，您初始化Service2的客户，该客户再次拨打Service2.GetData。

jQuery Ajax与Json调用WCF服务传递给WCF服务

2 个答案: