在asp.net mvc中打造一个通用的下拉框控件

我们一般把通用的组件放在Shared文件夹下

@{    

var model = ViewData["dataSource"] as IDictionary<string, string>;    

var selectedItem = ViewData["selected"] == null ? string.Empty :ViewData["selected"].ToString();

}

<select class="@ViewData["className"] SelectWrapper" id="@ViewData["id"]" name="@ViewData["name"]" >    

          <option value="">--请选择--</option>    

         @foreach (var item in model)     {        

          string selected = selectedItem == item.Key ? "selected =\"selected\"" : string.Empty;    

            <option value="@item.Key" @selected>@item.Value</option>    

}

</select>

页面应用：   @Html.Partial(Config.SelectControlView, new ViewDataDictionary() {       

              {"dataSource", inputModel.ALLSaveModelSelectDataSource},

              {"selected", -1},

              {"for", "SaveModel"},

              {"id","savemode"},

             {"name","savemode"}  

               })

Config.SelectControlView的对应值为：

 public const string SharedFolder = "~/Areas/Sample/Views/Shared/";

public static string SelectControlView = Path.Combine(SharedFolder, "Controls/_Select.cshtml");