使用Javascript调用WCF服务时出现问题 [英] Problem in calling WCF Service using Javascript

问题描述

我从JavaScript调用WCF服务时遇到问题.

我正在使用ajax自动完成扩展程序(一种存储过程)从sql表中获取一堆记录.
我无法弄清楚哪里出了错.
谁能帮我吗?

Hi,

I have a problem in Calling the WCF Service from JavaScript.

I am using ajax autocomplete extender, a stored procedure, to fetch a bunch of records from sql table.
I am unable to figure out where I made a mistake.
Can anyone help me?

designer.cs
   public System.Data.Linq.Table<icdcode> ICDCODEs
   {
      get
      {
         return this.GetTable<icdcode>();
      }
   }
}
[global::System.Data.Linq.Mapping.TableAttribute(Name="dbo.ICDCODE")]
public partial class ICDCODE
{
    private string _CODE;
    private string _DESCRIPTION;
    public ICDCODE()
    {
    }
    [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_CODE", DbType="NVarChar(20) NOT NULL", CanBeNull=false)]
    public string CODE
    {
        get
        {
            return this._CODE;
        }
        set
        {
            if ((this._CODE != value))
            {
                this._CODE = value;
            }
        }
    }
    [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_DESCRIPTION", DbType="NVarChar(200) NOT NULL", CanBeNull=false)]
    public string DESCRIPTION
    {
        get
        {
            return this._DESCRIPTION;
        }
        set
        {
            if ((this._DESCRIPTION != value))
            {
                this._DESCRIPTION = value;
            }
        }
        
GetDataCode.cs  //service name.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Activation;
using System.ServiceModel.Web;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Windows.Forms;
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "GetDataCode" in code, svc and config file together.

    [ServiceContract(Namespace = "QAWorks")]
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class GetDataCode
    {
        public void DoWork()
        {
        }
        public String[] getResult(string input)
        {
            string description=input;
            String[] result;
            using(DATADataContext db=new DATADataContext())
            {
                result = (from p in db.ICDCODEs
                          where p.DESCRIPTION.Contains(input)
                          select p.DESCRIPTION).ToArray();
            }
            return result;

        }
    }
    
<asp:TextBox ID="txtDiagnosis" runat="server"  Width="150px" />;
<ajaxToolkit:TextBoxWatermarkExtender ID="AJXPDIAGNOSIS"  runat="server" TargetControlID="txtDiagnosis"  WatermarkCssClass="watermarkedSingleLine" WatermarkText="DIAGNOSIS" />;
<ajaxToolkit:AutoCompleteExtender ID="AJXFILLDIAGNOSIS"  runat="server" CompletionInterval="100" DelimiterCharacters=" " Enabled="True" FirstRowSelected="True" MinimumPrefixLength="1"  önClientItemSelected="FillDiagnosis(this)" ServiceMethod="getResult" ServicePath="~/Services/GetDataCode.svc" TargetControlID="txtDiagnosis">

Java script
function FillDiagnosis() {
   var input = document.getElementById('<%=txtDiagnosis.ClientID%>').value;
   GetDataCode.getResult(input, OnWSRequestComplete);
}
function OnWSRequestComplete(results) {
   alert(results);
}
</icdcode></icdcode>

推荐答案

尝试更改以下内容:

Try changing the following:

var input = document.getElementById('<%=txtDiagnosis.ClientID%>').value;

至:

to:

var input = document.getElementById('txtDiagnosis').value; // edited from .Text to .value

要看的东西:
1. getResult函数缺少[OperationContract].
2.根据文档，getResult方法签名与AutoCompleteExtender的必要签名不匹配. [ ^ ]用作ServiceMethod.
3. GetDataCode.getResult传递两个参数，但是方法签名仅显示一个.
[/EDIT]

Things to look at:
1. [OperationContract] is missing from getResult function.
2. getResult method signature does not match the necessary one for the AutoCompleteExtender according to the documentation[^] for use as a ServiceMethod.
3. GetDataCode.getResult is passing two parameters, however, the method signature only shows one.
[/EDIT]

Hurrah !!
我终于完成了任务.感谢大家的帮助. ;)

Hurrah!!
I completed my task finally. Thanks for the help to everyone. ;)

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