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使用jquery使用.net web服务

jquery asp.net c#

The Muffin Man · 技术社区 · 15 年前

我制作了这个web服务,它从sql server db返回一个数据表。有人能帮我用jquery来显示它吗?

web服务

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

[ScriptService]
public class WebService : System.Web.Services.WebService
{
  DataTable dt = new DataTable();

  [WebMethod]
  public DataTable dbAccess()
  {
    using (SqlConnection conn = new SqlConnection(
            ConfigurationManager.ConnectionStrings["localConnectionString"]
           .ConnectionString))
    {
      using (SqlDataAdapter da = new SqlDataAdapter())
      {
        conn.Open();
        da.SelectCommand = 
             new SqlCommand("SELECT VehicleMake FROM VehicleMakes", conn);
        da.Fill(dt);  
      }
      conn.Close();
    }
    return dt;   
  }   
}

这是我用jquery得到的

<script type="text/javascript">

    $(function () {
        $('#Button1').click(getData);
    });

    function getData() {
        $.ajax({
            type: "POST",
            url: "WebService.asmx/dbAccess",
            data: "{}",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (response) {
                // What goes here?
            },
            failure: function (msg) {
                //error message
            }
        });
    }
</script>

4 回复 | 直到 15 年前

markt 15 年前

过去,在jQuery中使用asmx服务时,我对post/json使用了如下内容:

假设我有一个这样的响应类:

    public ResponseClass
    {
        public string Message { get; set; }
    }

以及具有如下方法的webservice:

    [WebMethod]
    [ScriptMethod(UseHttpGet = false, ResponseFormat = ResponseFormat.Json)]
    public ResponseClass PostResponse()
    {
        var response = new ResponseClass() {Message = "Hello World"};
        return response;
    }

一些像这样的html:

<div id="response">
</div>

javascript:

$.ajax({
    url: '/MyService.asmx/PostResponse',
    data: "{}",
    type: "POST",
    cache: false,
    dataType: 'json',
    contentType: "application/json; charset=utf-8",
    success: function(msg) {
        var response = msg.d; //your response object
        $('#response').html(response.Message); //set the response div contents to the Message 
    },
    error: function(xhr, status, error) {
        alert(error); //do something if there is an error
    }
});

The Muffin Man 15 年前

以防有人来找我提供的答案。

我的web服务与数据库通信,用SqlDataReader读取表,并将该数据加载到data table中。然后每一行存储在一个ArrayList中。

   [WebService(Namespace = "http://babyUnicorns.net/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

[ScriptService]
public class WebService : System.Web.Services.WebService
{
    [WebMethod]
    public object dbAccess()
    {

        DataTable table = new DataTable("myTable");
        ArrayList arl = new ArrayList();
        using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["localConnectionString"].ConnectionString))
        { 
            using(SqlCommand comm = new SqlCommand("SELECT * FROM VehicleMakes",conn))
            {
                conn.Open();
                SqlDataReader reader = comm.ExecuteReader();
                table.Load(reader);
                reader.Close();
                conn.Close();    
            }            
        }
        foreach(DataRow dRow in table.Rows)
                {
                    arl.Add(dRow["VehicleMake"]+"  "+dRow["VehicleMakeId"]);    
                }
        return arl.ToArray();       
    }  
}

使用jQuery ajax命令,我将返回的arrayList和foreach项追加到名为“output”的div中。jQuery$。每个命令都用于分离数组。我通过阅读API了解了如何使用它。

    function getData() {
            $.ajax({
                type: "POST",
                url: "WebService.asmx/dbAccess",
                data: "{}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) {
                    var response = msg.d;
                    $.each(response, function(index, value) {
                        $('#output').append(value+'<br />'); 
                        });              
                },
                failure: function (msg) {
                    alert('failure');
                }
            });
        }
</script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <input type="button" id="Button1" value="Get Cars" /><input type="button" id="buttonClear" value="Clear" />
<div id="output">

</div>
    </div>
    </form>
</body>
</html>

这将返回从数据库中提取的汽车列表。

Alfred redcoder 13 年前

<input id="Button2" type="button" value="button" onclick="Find()" /><br /> // call the javascript function Find()

//Javascript function Find()
function Find() {
        $(document).ready(function () {
            $.ajax(
            {
                type: "POST",
                url: "Model/CustomerDTO.asmx/GetDetail",
                data: "{'nm':'" + $('#Text1').val() + "'}", // passing a parameter to retrive detail.
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) {
                                     var obj = jQuery.parseJSON(msg.d); // parsing of Json string to Javascript object.
                    alert(obj.COMPANYADDRESS); //. anything(depends upon your Fieldname
                    $('#RSSContent').html(obj.COMPANYADDRESS); // bind data to a div

                },
                error: function () {
                    alert('data could not be be found');
                }
            });
        });

    }

kobe 15 年前

你有多种选择

1) 您可以从后端返回纯html并在div标记上返回do.html

2) 使用stringbuild构造jsonp对象并返回UI。在用户界面中可以使用评估(响应)并分析对象。

如果你需要更多的信息请告诉我。

两种方法我都做过。

这是我的代码,你可以这样做

var jsonobj = eval('(' + tempstr + ')');

            for (var i = 0; i < jsonobj.searchsuggest.items.item.length; i++) { }