Question

我有一个ViewModel类：

public class IndexViewModel 
    {
        public IndexViewModel()
        {
            GridList = new List<GridModel>();
        }
        public List<Models.GridModel> GridList { get; set; }
        public string ATempProperty { get; set; }        
    }

我成功将它传递给了我的View。在提交时，我希望将其返回到当前ViewModel的操作。但是GridList是空的！如何从视图中获取列表？我的观点是这样的：

@using (Html.BeginForm("Edit", "Home", FormMethod.Post))
{
    <div id="lll">
        @Html.TextBoxFor(m => m.ATempProperty)        
        @Html.HiddenFor(m => m.GridList)
    </div>

    <input type="submit" value="Submit" />
}

Answer 1

您必须迭代它并为属性创建隐藏字段：

 <div id="lll">
        @Html.TextBoxFor(m => m.ATempProperty)
        @for(int i = 0 ; i< Model.GridList.Count; i++)
        {        
          @Html.HiddenFor(m => Model.GridList[i].PropertyA)
          @Html.HiddenFor(m => Model.GridList[i].PropertyB)
          ............................
          ............................
        }
    </div>

Answer 2

我做到了。但我得到一个错误消息： 没有为此对象定义无参数构造函数。 我只有一个动作：

public ActionResult Edit(IndexViewModel ind)
        {    
            Do s.t .    
            return View();
        }

我的ViewModel是：

public class GridModel
    {
        //public GridModel() { }
        public GridModel(List<object> GridDataSource, string GridName, int RecordCount,
            int PageRecordCount, int CurrentPageIndex, string Controller, string ActionName, string TargetID)
        {
            this.GridDataSource = GridDataSource;
            this.GridName = GridName;
            this.RecordCount = RecordCount;
            this.PageRecordCount = PageRecordCount;
            this.CurrentPageIndex = CurrentPageIndex;
            this.Controller = Controller;
            this.ActionName = ActionName;
            this.TargetID = TargetID;


        }

        public List<string> classNameList = new List<string>();

        public List<object> GridDataSource { get; set; }
        public string GridName { get; set; }
        public int RecordCount { get; set; }
        public int PageRecordCount { get; set; }
        public int CurrentPageIndex { get; set; }
        public string Controller { get; set; }
        public string ActionName { get; set; }
        public string TargetID { get; set; }

        private Dictionary<string, string> styles =
            new Dictionary<string, string>();

        private Dictionary<string, string> columns=
            new Dictionary<string, string>();        

        [ReadOnly(true)]
        public enum GridClasses
    {
            GridTable,
            GridHeader,
            GridBody,
            GridFooter,
            GridAlternativeRow,
            GridPager
    }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="GridClass">Chose yor class from GridModel.GridClass Enum</param>
        /// <param name="CssStyle">Enter full css attribute and values in a string format. Something like this :
        /// "color:red; font-size:10px;"</param>
        public void SetGridStyle(GridModel.GridClasses GridClass, string CssStyle)
        {
            if (styles.ContainsKey(GridClass.ToString()))
                styles[GridClass.ToString()] = CssStyle;
            else
                styles.Add(GridClass.ToString(), CssStyle);
        }    

        /// <summary>
        /// 
        /// </summary>
        /// <returns>Return: The CSS style of getted class in CSS originall format.</returns>
        public string GetGridStyle(GridModel.GridClasses GridClass)
        {
            if (styles.ContainsKey(GridClass.ToString()))
            {
                return " GridContainer" + GridName + " ." + GridClass.ToString() + "{" + styles[GridClass.ToString()] + "}";
            }
            else
                return "";
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns>Return: The CSS style of all classes of grid in CSS originall format.</returns>
        public string GetGridStyle()
        {
            string css = "";
            foreach(KeyValuePair<string, string> d in styles)
                if(d.Key == GridClasses.GridAlternativeRow.ToString())
                    css += " #GridContainer" + GridName + " ." + GridName + d.Key + " tr:nth-child(even){" + d.Value + "} ";
                else if (d.Key == GridClasses.GridPager.ToString())
                css += " #GridContainer" + GridName + " ." + GridName + d.Key + " span{" + d.Value + "} ";
                else
                    css += " #GridContainer" + GridName + " ." + GridName + d.Key + "{" + d.Value + "} ";
            return css;
        }

        public void SetColumnsStyle(string ColumnName, string CssStyle)
        {
            if (columns.ContainsKey(ColumnName))
                columns[ColumnName] = CssStyle;
            else
                columns.Add(ColumnName, CssStyle);
        }

        public string GetColumnStyle()
        {
            string css = "";
            foreach (KeyValuePair<string, string> d in columns)
                css += " #GridContainer" + GridName + " ." + GridName + d.Key + "{" + d.Value + "} ";
            return css;
        }

        public List<string> GetStyledColumns()
        {
            List<string> l = new List<string>();
            foreach (KeyValuePair<string, string> d in columns)
                l.Add(d.Key);
            return l;
        }

        public string EditController = "";
        public string EditAction = "";
        public bool IsInEditMode = false;
        public string GridCssClass = "webgrid";

    }

我的新观点是：

@using (Html.BeginForm("Edit", "Home", FormMethod.Post, Model))
{
    int listNumber = 0;
    <div id="lll">

        @Html.TextBoxFor(m => m.ATempProperty)      
        @foreach(WebApplication1.Models.GridModel l in Model.GridList)
        {
            @Html.HiddenFor(m => m.GridList[listNumber].GridName);
            @Html.HiddenFor(m => m.GridList[listNumber].PageRecordCount);            
        }           
    </div>

    <input type="submit" value="Submit" />
}

[ASP MVC]：提交时视图模型的松散列表值

2 个答案: