从WebService填充AutoComplete

时间:2013-03-18 18:04:59

标签: c# javascript asp.net json web-services

我已经设法使用Web服务在C#.net中使用JQuery自动完成功能。

这是asp代码:

    <div class="row">
    <div class="span4">
        <h3>
            Manage Season</h3>
    </div>
</div>
<div class="row">
    <div class="span2">
        <p>
            <label class="control-label" for="TeamName">
                Team Name:</label></p>
    </div>
    <div class="span3">
        <asp:TextBox ID="TeamNameTextBox" runat="server" CssClass="searchinput"></asp:TextBox>
        <asp:Button ID="AddTeamButton" CssClass="btn btn-primary" runat="server" Text="Add"
            OnClick="AddTeamButton_Click" />
    </div>
<script type="text/javascript">
    $(document).ready(function () {
        $(".searchinput").autocomplete({
            source: function (request, response) {
                $.ajax({
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    url: "PredictiveSearch.asmx/GetAllPredictions",
                    data: "{'keywordStartsWith':'" + request.term + "'}",
                    dataType: "json",
                    async: true,
                    success: function (data) {
                        response(data.d);

                    },
                    error: function (result) {
                        alert("Due to unexpected errors we were unable to load data");
                    }
                });
            },
            minLength: 1
        });
    });
</script>

和c#网络服务:

    [System.Web.Script.Services.ScriptService]
public class PredictiveSearch : System.Web.Services.WebService
{

    [WebMethod]
    public IList<string> GetAllPredictions(string keywordStartsWith)
    {
        //TODO: implement real search here!

        SqlConnection conn = new SqlConnection(WebConfigurationManager.ConnectionStrings["RaiseFantasyLeagueConnectionString"].ConnectionString);
        SqlCommand cmd = new SqlCommand("[dbo].[findEnglishTeams]", conn);
        cmd.CommandType = CommandType.StoredProcedure;

        string searchTerm = keywordStartsWith;
        SqlParameter searchTermParam = new SqlParameter("@searchterm", searchTerm);

        cmd.Parameters.Add(searchTermParam);

        IList<string> output = new List<string>();

        conn.Open();
        SqlDataReader dReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        if (dReader.HasRows)
        {
            while (dReader.Read())
            {
                output.Add(dReader["englishTeamName"].ToString());
            }
            return output;
        }
        else
        {
            return output; 
        }
    }
}

我需要获取我填充下拉列表的值的ID,这怎么可能?

2 个答案:

答案 0 :(得分:0)

由于您使用Ajax请求在客户端上填充此内容,因此您将不得不:

  1. 通过将选择的值写入html输入type = hidden元素并在表单回发时在服务器端读取它来获取所选值。只是不要忘记通过添加input type=hidden
  2. 使runat="server"元素成为服务器端控件
  3. 通过另一个Ajax请求提交所选值。
  4. 使用列表框的名称作为密钥,使用Request.Params集合读取所选值。类似的东西:

    var selectedValues = Request.Params["select_box_name"];
    
  5. 您将无法简单地使用ListBox.SelectedValue,因为在ViewState中找不到值,因为您通过Ajax填充它。

    我选择选项3 ......

答案 1 :(得分:0)

希望like能更好地满足您的需求