Question

如何从vb.net中的javascript调用Wcf服务？我收到错误“服务调用失败：415不支持的媒体类型”。

我的WebService代码：

<ServiceContract()> 
Public Class Service <OperationContract()> _
<WebInvoke(Method:="POST", 
BodyStyle:=WebMessageBodyStyle.Wrapped, ResponseFormat:=WebMessageFormat.Json)> _ 
Public Function MyFunction(ByVal Count As String) As String
Return String.Format("Welcome in WCF call")
End Function 
End Class

我的HTML代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <!DOCTYPE html>
    <title>Call WCF</title>
    <script src="Scripts/jquery-1.4.1-vsdoc.js" type="text/javascript"></script>
    <script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <script src="Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
    <script type="text/javascript" src="Scripts/jquery-1.4.1.min.js"></script>
      <script type="text/javascript">
        var counter = 0;
        function CallMyService() {
            // debugger;
            //alert("hi");
            counter++;

            $.ajax({
                type: "POST",
                url: "http://localhost:25057/WCFVB/Service.svc/MyFunction",
                data: '{"Count": "' + counter + '"}',
                processData: false,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
//                contentType: "application/json", // content type sent to server
                success: ServiceSucceeded,
                error: ServiceFailed
            });
        }

        // ---- WCF Service call backs -------------------

        function ServiceFailed(result) {
            //debugger;
            Log('Service call failed: ' + result.status + '  ' + result.statusText);
        }

        function ServiceSucceeded(result) {
            // debugger;
            var resultObject = result.MyFunctionResult;
            Log("Success: " + resultObject);
        }


        function Log(msg) {
            $("#logdiv").append(msg + "<br />");
        }
    </script>

</head>
<body>
    <input id="Button1" type="button" value="Execute" onclick="CallMyService();" />

    <div id="logdiv"></div> 
</body>
</html>

Answer 1

这是针对我们的WCF服务运行的一个小JavaScript请求的示例 - 在这种情况下它只是一个简单的ping函数，但所有部分都在那里：

的的 __ _ __ _ ___ 编辑 __ _ __ _ __ _ __ _ _

<html> <head> <meta http-equiv="Content-Type" content="text/xml; charset=UTF-8" /> <title>SOAP JavaScript Client Test</title> <script type="text/javascript"> function Ping() { //set up varable var sContent; // 'Content-Type: text/xml \r\n ' + // 'Host: localhost:8085 \r\n \r\n '; var s; s+="<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\">"; s+="<s:Body><HostConnect xmlns=\"http://SomeURL \">"; s+="<inMsg xmlns:a=\"http://schemas.datacontract.org/2004/07/ \" xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\">"; s+="<a:TextSection>" ; s+="<Method value=\"ping\" >"; s+="</a:TextSection>"; s+="</inMsg>"; s+="</HostConnect>"; s+="</s:Body>"; s+="</s:Envelope>"; var xmlhttp = new XMLHttpRequest(); xmlhttp.open('POST', Demo.URL.value, true); //xmlhttp.overrideMimeType("text/xml; charset=UTF-8"); /* ... */ // alert(Demo.URL.value); xmlhttp.onreadystatechange = function() { if (xmlhttp.readyState == 4||xmlhttp.readyState == 0) { //alert("Ready state: " + xmlhttp.readyState.toString()); if (xmlhttp.status == 200) { //alert("good"); Demo.pingresponse.value = "Response: " +xmlhttp.responseText; } if (xmlhttp.status !=200){ //alert("bad"); Demo.pingresponse.value = "Error: " +xmlhttp.status.toString() +" response text: " +xmlhttp.responseText; } } else { //alert("readystate bad"); } } xmlhttp.setRequestHeader("POST http:servername:8085/HostInterface/HostConnect HTTP/1.1"); xmlhttp.setRequestHeader("VsDebuggerCausalityData","uIAA"); xmlhttp.setRequestHeader("SOAPAction","\"http://ServerName\""); xmlhttp.setRequestHeader("Host","localhost:8085"); xmlhttp.setRequestHeader("Expect","100-continue"); xmlhttp.setRequestHeader("Accept-Encoding","gzip, deflate"); xmlhttp.setRequestHeader("Connection","Keep-Alive"); xmlhttp.setRequestHeader("Content-Length","639"); xmlhttp.setRequestHeader("Content-type", "text/xml; charset=utf-8"); xmlhttp.send(sContent); } </script> </head> <body> <form name="Demo" action="" method="post"> <div> Web Service URL <input id="URL" type="text" size="140" value="" /><br /> <input type="button" value="Ping" onclick="Ping();" /><br /> <textarea id="pingresponse"cols="100" rows="10"></textarea> <br /> </div> </form> </body> <html>

试试这个：

如何使用vb.net代码从javascript调用Wcf服务？

1 个答案: