通过JS，数据类型的Json Web服务调用 [英] Web service call through JS, DataType Json

问题描述

我想通过调用一个JS的Web服务，但无论如何它没有得到调用。
我试图使2号总和。

I am trying to call web service through a JS but anyhow it doesnt get call. I am trying to make sum of 2 number.

页面包含3 文本框，它已就文本设置硬codded
如

Page contains of 3 textbox and it has it text set hard codded as :

 <form id="form1" runat="server">
    <div>
    <asp:TextBox ID="Text1"  Text="5" runat="server">
    </asp:TextBox>
     <asp:TextBox ID="Text2" Text="2" runat="server">
    </asp:TextBox>
     <asp:TextBox ID="Text3" runat="server">
    </asp:TextBox>
    </div>
    </form>

我的code如下：

My code are as follows:

<script type="text/javascript">
        $(document).ready(function () {
            debugger;
            $.ajax({
                type: "POST",
                contentType: "application/json; charset=utf-8",
                url: "C:/Users/hp/Documents/visual studio 2010/Projects/WebApplication3/WebApplication3/WebService1.asmx/sum",
                data: "{'a':'" + $('input[id$=Text1]').val() + "','b':'" + $('input[id$=Text2]').val() + "'}",
                dataType: "json",


                success: function (data) {
                    alert(data);
                    var results = eval('(' + data.d + ')');
                    if (results == "success") {

                        $('input[id$=Text3]').val(data);
                        //$('span[id$=lblErr]').hide();
                    }
                    else {
                        $('span[id$=lblmsg]').hide();

                        // $('span[id$=lblErr]').show();

                    }


                },
                error: function () {
                    alert('Error');
                }


            });
        });

    </script>

WebService的名称WebForm1.aspx的

WebService name WebForm1.aspx

 public class WebService1 : System.Web.Services.WebService
    {

        [WebMethod]
        [ScriptMethod(UseHttpGet = false, ResponseFormat = ResponseFormat.Json)]
        public string sum(string a, string b)
        {
            string json = "";
            int sum = Convert.ToInt32(a) + Convert.ToInt32(b);
            System.Web.Script.Serialization.JavaScriptSerializer oSerializer = new System.Web.Script.Serialization.JavaScriptSerializer();

            json = oSerializer.Serialize(sum);
            return json;


        }

    }

这显示出在每次运行时错误对话框。请帮助我通过它。谢谢你。

It showing Error box on each run. Kindly assist me through it. Thanks.

推荐答案

您的网址是错误的。它应该是这种形式的：<​​/ p>

Your URL is wrong. It should be of this form:

 url: "/WebService1.asmx/sum"

和，以确保它始终解析正确的道路，而是可以做到这一点：

And to make sure it always resolves to the right path, you can instead do this:

url: '<%=ResolveClientURL("~/WebService1.asmx/sum%>")'

另外，你的成功处理，你不需要做的：

Also, in your success handler, you don't need to do:

 var results = eval('(' + data.d + ')');

您可以简单地做：

var result= data.d;

最后，在的WebMethod，不需要使用的JavaScriptSerializer在所有。你可以简单地做：

Finally, in your WebMethod, you don't need to use the JavascriptSerializer at all. You can simply do:

 int sum = ...  
 return sum;

响应已经是JSON格式。无需序列两次。

The response is already in JSON format. No need to serialize it twice.

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