ASP.NET从WebService

Question

employes.aspx.cs中的getEditData方法：

[System.Web.Services.WebMethod]
public static string getEditData(int id)
{
    Employe e = new Employe();
    try
    {
        using (SqlConnection openCon = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MyDBConnection"].ConnectionString))
        {
            string saveStaff = "SELECT * FROM employes WHERE id=@id";

            using (SqlCommand querySaveStaff = new SqlCommand(saveStaff))
            {
                querySaveStaff.Connection = openCon;

                querySaveStaff.Parameters.Add("@id", SqlDbType.Int).Value = id;

                openCon.Open();

                using (SqlDataReader reader = querySaveStaff.ExecuteReader())
                {
                    // Check is the reader has any rows at all before starting to read.
                    if (reader.HasRows)
                    {
                        // Read advances to the next row.
                        while (reader.Read())
                        {
                            e.id = reader.GetInt32(reader.GetOrdinal("id"));
                            e.prenom = reader.GetString(reader.GetOrdinal("prenom"));
                            e.nom = reader.GetString(reader.GetOrdinal("nom"));
                            e.imei = reader.GetString(reader.GetOrdinal("phone_IMEI"));
                            e.sexe = reader.GetString(reader.GetOrdinal("sexe"));
                            e.tel = reader.GetString(reader.GetOrdinal("tel"));
                            e.comment = reader.GetString(reader.GetOrdinal("comment"));
                        }
                    }
                }
                openCon.Close();
            }
        }
    }
    catch (Exception ex) { }

    JavaScriptSerializer js = new JavaScriptSerializer();
    return js.Serialize(e);
}

JS / AJAX函数：

function openEdit(id) {
    $.ajax({
        type: "POST",
        url: "employes.aspx/getEditData",
        data: '{ id: ' + id + ' }',
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {
            var parsedData = JSON.parse(data.d);
            console.log(parsedData);
            $("#idEdit").val(parsedData.id);
            $("#prenomEdit").val(parsedData.prenom);
            $("#nomEdit").val(parsedData.nom);
            $("#imeiEdit").val(parsedData.imei);
            $("#sexeEdit").val(parsedData.sexe);
            $("#telEdit").val(parsedData.tel);
            $("#commentEdit").val(parsedData.comment);
        },
        error: function (data) { console.log("error"); }
    });

    $("#myModalEdit").modal('toggle');
}

console.log（parsedData）的结果;对于4行：

对象{id：39，prenom：“ayoub”，nom：“laazazi”，imei：“35blabla..227”，性别：“男性”，电话：“06blabla..4”，评论：“meme” }

对象{id：40，prenom：“admin”，nom：“admin”，imei：“744444”，性别：“男性”，电话：null，评论：null}

对象{id：53，prenom：“lawl”，nom：“k”，imei：“555”，sexe：“female”，tel：null，comment：null}

Object {id：54，prenom：“gfd235”，nom：“sdfgh2”，imei：null，sexe：null，tel：null，comment：null} //这里的问题sexe不应该是NULL作为SQL服务器形象说。

我在模态选择中得到的结果（PS：选择值是：男性和女性）：

2 examples of the Modals image

SQL Server中的表[employe]：

SQL Server table image

openEdit（id）按钮：

    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
    <asp:Timer ID="Timer1" runat="server" Interval="600000" ontick="Timer1_Tick"></asp:Timer>

    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:MyDBConnection %>" 
        SelectCommand="SELECT * FROM [employes]"></asp:SqlDataSource>

    <div id="info"></div>
    <!-- Data Display DIV -->
    <div id="viewdata" class="overflowTable">
        <asp:repeater id="Repeater1" datasourceid="SqlDataSource1" runat="server">
            <HeaderTemplate>
                <table class="table table-bordered table-hover table-colored results">
                    <thead>
                        <tr>
                        <th>Nom</th>
                        <th>Sexe</th>
                        <th>Code IMEI</th>
                        <th>Commentaire</th>
                        <th>Action</th>
                        </tr>
                    </thead>
                    <tbody id="myTbody">

            </HeaderTemplate>

            <ItemTemplate>
            <tr>
                <td onclick="selectRow(this)" class="restd"><%# generateName(Eval("prenom"), Eval("nom"))%></td>
                <td onclick="selectRow(this)" class="restd"><%# checkNull(Eval("sexe").ToString())%></td>
                <td onclick="selectRow(this)" class="restd"><%# checkNull(Eval("phone_IMEI").ToString()) %></td>
                <td onclick="selectRow(this)" class="restd"><%# checkNull(Eval("comment").ToString())%></td>
                <td>
                    <asp:LinkButton class="btn btn-success btn-sm" title="Modifier un client" onclick="openEdit(<%# Eval("id") %>)"><span class="glyphicon glyphicon-pencil" aria-hidden="true"></span></asp:LinkButton>
                    <!-- this is the button that opens the modal -->
                </td>
            </tr>
            </ItemTemplate>

            <FooterTemplate>
                </tbody>
                </table>
            </FooterTemplate>
        </asp:repeater>
    </div>
</ContentTemplate>
</asp:UpdatePanel> 

员工类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace BlablaWebService
{
    public class Employe
    {
        public int id { get; set; }
        public string prenom { get; set; }
        public string nom { get; set; }
        public string imei { get; set; }
        public string sexe { get; set; }
        public string tel { get; set; }
        public string comment { get; set; }

        public Employe() { }

        public Employe(int id, string prenom, string nom, string imei, string sexe, string tel, string comment)
        {
            this.id = id;
            this.prenom = prenom;
            this.nom = nom;
            this.imei = imei;
            this.sexe = sexe;
            this.tel = tel;
            this.comment = comment;
        }
    }
}

修改

感谢PólO'Muilleoir，这是我最后的工作代码：

using (SqlDataReader reader = querySaveStaff.ExecuteReader())
{
    if (reader.Read())
    {
        e.id = reader.GetInt32(reader.GetOrdinal("id"));
        e.prenom = reader.IsDBNull(reader.GetOrdinal("prenom")) ? string.Empty : reader.GetString(reader.GetOrdinal("prenom"));
        e.nom = reader.IsDBNull(reader.GetOrdinal("nom")) ? string.Empty : reader.GetString(reader.GetOrdinal("nom"));
        e.imei = reader.IsDBNull(reader.GetOrdinal("phone_IMEI")) ? string.Empty : reader.GetString(reader.GetOrdinal("phone_IMEI"));
        e.sexe = reader.IsDBNull(reader.GetOrdinal("sexe")) ? string.Empty : reader.GetString(reader.GetOrdinal("sexe"));
        e.tel = reader.IsDBNull(reader.GetOrdinal("tel")) ? string.Empty : reader.GetString(reader.GetOrdinal("tel"));
        e.comment = reader.IsDBNull(reader.GetOrdinal("comment")) ? string.Empty : reader.GetString(reader.GetOrdinal("comment"));
    }
}

Answer 1

从我看到你正试图获得一个单一的＆＃39;记录。试试这个......

using (SqlDataReader reader = querySaveStaff.ExecuteReader())
            {
                if (reader.Read())
                    {
                        e.id = reader.GetInt32(reader.GetOrdinal("id"));
                        e.prenom = reader.GetString(reader.GetOrdinal("prenom"));
                        e.nom = reader.GetString(reader.GetOrdinal("nom"));
                        e.imei = reader.GetString(reader.GetOrdinal("phone_IMEI"));
                        e.sexe = reader.GetString(reader.GetOrdinal("sexe"));
                        e.tel = reader.GetString(reader.GetOrdinal("tel"));
                        e.comment = reader.GetString(reader.GetOrdinal("comment"));
                    }
                }

另外，在您的AJAX中，您可能需要更改＆＃39; POST＆＃39;到＆＃39; GET＆＃39;

Answer 2

我认为问题在于＆＃39; imei＆＃39;在＆＃39; sexe＆＃39;这导致读者失败。

替换

e.imei = reader.GetString(reader.GetOrdinal("phone_IMEI"));

与

int ordinal = reader.GetOrdinal('phone_IMEI');

    if(!reader.IsDbNull(ordinal))
    {
       e.imei = reader.GetString(ordinal);
    } 
    else
    {
       e.imei = string.Empty;
    }

有更好的方法来写这个，但试着看看是否能解决它。您还必须对可能返回null的任何其他值执行此操作，尝试为reader对象编写扩展方法。