下拉框，多选按钮，单选按钮的保存修改

下拉框的使用：

 <tr>
     <th>设计风格：</th>
     <td>
        <select name="DesignStyle" class="select">
            <option value="1" @(Html.ValueFor(m => m.StayGrade).ToString() == "1" ? "selected" : "")>网红ins风</option>
            <option value="2" @(Html.ValueFor(m => m.StayGrade).ToString() == "2" ? "selected" : "")>中式风</option>
            <option value="3" @(Html.ValueFor(m => m.StayGrade).ToString() == "3" ? "selected" : "")>日式风</option>
            <option value="4" @(Html.ValueFor(m => m.StayGrade).ToString() == "4" ? "selected" : "")>工业风</option>
            <option value="5" @(Html.ValueFor(m => m.StayGrade).ToString() == "5" ? "selected" : "")>北欧风</option>
            <option value="6" @(Html.ValueFor(m => m.StayGrade).ToString() == "6" ? "selected" : "")>小清新风</option>
        </select>
      </td>
 </tr>

单选按钮：

<tr>
    <th>人脸检票支持：</th>
    <td>
      <label>
       　　 <input type="radio" name="FaceChecking" value="1" @(Html.ValueFor(m => m.FaceChecking).ToString() == "1" ? "checked" : "")> 支持人脸检票(<span class="tips_gray">仅限于有人脸检票设备的景区勾选</span>)
        　　<input type="radio" name="FaceChecking" checked="checked" value="0" @(Html.ValueFor(m => m.FaceChecking).ToString() == "0" ? "checked" : "")>不支持人脸检票
　　　　</label>
    </td>
 </tr>

多选按钮：

<tr>
                        <th>角色：</th>
                        <td>
                            <input type="checkbox" name="Role" value="0" @(!string.IsNullOrEmpty(Model.Role) && Model.Role.IndexOf("0") >-1?"checked":"") /> 平台
                            <input type="checkbox" name="Role" value="1" @(!string.IsNullOrEmpty(Model.Role) && Model.Role.IndexOf("1") > -1 ? "checked" : "") /> 运营商
                            <input type="checkbox" name="Role" value="2" @(!string.IsNullOrEmpty(Model.Role) && Model.Role.IndexOf("2") > -1 ? "checked" : "") /> 供应商
                            <input type="checkbox" name="Role" value="3" @(!string.IsNullOrEmpty(Model.Role) && Model.Role.IndexOf("3") > -1 ? "checked" : "") /> 分销商
                        </td>
                    </tr> 

2：

<tr>
                        <th>通知字段：</th>
                        <td>
                            <div class="sys_agent_per">
                                <ul>
                                    <li><label><input type="checkbox" name="NoticeField" value="OrderID" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "OrderID") ? "checked" : "")>订单号</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="UserName" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "UserName") ? "checked" : "")>姓名</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="Mobile" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "Mobile") ? "checked" : "")>手机号码</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="CardID" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "CardID") ? "checked" : "")>身份证号码</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="Address" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "Address") ? "checked" : "")>配送地址</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="Email" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "Email") ? "checked" : "")>电子邮箱</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="ProductName" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "ProductName") ? "checked" : "")>产品名称</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="PlayTime" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "PlayTime") ? "checked" : "")>出行日期</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="Number" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "Number") ? "checked" : "")>订单数量</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="Memo" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "Memo") ? "checked" : "")>订单备注</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="ConferPrice" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "ConferPrice") ? "checked" : "")>签约价</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="TotalConferPrice" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "TotalConferPrice") ? "checked" : "")>签约价小计</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="Price" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "Price") ? "checked" : "")>分销价</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="TotalPrice" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "TotalPrice") ? "checked" : "")>分销价小计</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="SalePrice" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "SalePrice") ? "checked" : "")>零售价</label></li>
                                    <li><label><input type="checkbox" name="NoticeField" value="TotalSalePrice" @(TravelB2B.Core.Utils.Tools.NoticeFieldChecked(Model.NoticeField, "TotalSalePrice") ? "checked" : "")>零售价小计</label></li>
                                </ul>
                            </div>
                        </td>
                    </tr>

共用方法： public static bool NoticeFieldChecked(string[] noticeField, string field)
        {
            return NoticeFieldChecked(Array2String(noticeField), field);
        }

        #region 数组转化成逗号隔开的字符串
        /// <summary>
        /// 数组转化成逗号隔开的字符串
        /// </summary>
        /// <param name="arr"></param>
        /// <returns></returns>
        public static string Array2String(string[] arr)
        {
            return Array2String(arr, ",");
        }

        public static string Array2String(string[] arr, string splitChar)
        {
            if (arr != null)
            {
                StringBuilder sb = new StringBuilder();
                if (arr != null)
                {
                    for (int i = 0; i < arr.Length; i++)
                    {
                        sb.Append(arr[i]);
                        if (i + 1 < arr.Length) sb.Append(splitChar);
                    }
                }
                return sb.ToString();
            }
            return string.Empty;
        }
        #endregion

  public static bool NoticeFieldChecked(string noticeField, string field)
        {
            if (string.IsNullOrEmpty(noticeField))
            {
                noticeField = "OrderID,UserName,Mobile,ProductName,PlayTime,Number";
            }
            if (!noticeField.StartsWith(",")) noticeField = "," + noticeField;
            if (!noticeField.EndsWith(",")) { noticeField += ","; }
            return noticeField.IndexOf("," + field + ",") > -1;
        }

MODEL:   public String[] NoticeField { get; set; }

实体：    public string NoticeField{get;set;}

Info.NoticeField = TravelB2B.Core.Utils.Tools.Array2String(this.NoticeField);

保存代码：if (Info.NoticeField != TravelB2B.Core.Utils.Tools.Array2String(this.NoticeField))
            {
                sb.Append("NoticeField的值由" + Info.NoticeField + "改为" + this.NoticeField + "<br>");
                Info.NoticeField = TravelB2B.Core.Utils.Tools.Array2String(this.NoticeField);
            }

保存后数据库值为：OrderID,UserName,Mobile,ProductName,PlayTime,Number

原文地址：https://www.cnblogs.com/hugeboke/p/11611845.html