asp.net-mvc-3 - MvcContrib 网格和复选框

Question

假设我渲染了一个复选框:

@Html.CheckboxFor(x => x.Checked) // Checked is true by default

ASP 会将其转换为:

<input checked="checked" data-val="true" data-val-required="The field is required." id="Checked" name="Checked" type="checkbox" value="true" />
<input name="Checked" type="hidden" value="false" />

由于 ASP 为复选框输出两个同名的输入，因此在提交带有复选框的表单时，我们还在 URL 中获得两个 GET 参数:

http://...?Checked=true&Checked=false

假设我还使用 MvcContrib 来显示带有排序的表格。

当我对列进行排序时，MvcContrib 无法理解重复的 GET 参数，并且不会写入 ?Checked=true&Checked=false，而是写入 ?Checked=true%2Cfalse code>，MVC3 无法将其解析为 bool。排序后的错误信息为:

String was not recognized as a valid Boolean.

还有其他人在使用 MvcContrib 网格时遇到过这个问题吗？

Answer 1

好吧，我想我已经找到了解决方案:

创建您自己的 HtmlTableGridRenderer:

public class CustomTableGridRenderer<TViewModel> : HtmlTableGridRenderer<TViewModel> where TViewModel : class
{
    protected override void RenderHeaderText(GridColumn<TViewModel> column)
    {
        if (IsSortingEnabled && column.Sortable)
        {
            string sortColumnName = GenerateSortColumnName(column);

            bool isSortedByThisColumn = GridModel.SortOptions.Column == sortColumnName;

            var sortOptions = new GridSortOptions
            {
                Column = sortColumnName
            };

            if (isSortedByThisColumn)
            {
                sortOptions.Direction = (GridModel.SortOptions.Direction == SortDirection.Ascending)
                    ? SortDirection.Descending
                    : SortDirection.Ascending;
            }
            else //default sort order
            {
                sortOptions.Direction = column.InitialDirection ?? GridModel.SortOptions.Direction;
            }

            var routeValues = CreateRouteValuesForSortOptions(sortOptions, GridModel.SortPrefix);

            //Re-add existing querystring
            foreach (var key in Context.RequestContext.HttpContext.Request.QueryString.AllKeys.Where(key => key != null))
            {
                if (!routeValues.ContainsKey(key))
                {
                    routeValues[key] = Context.RequestContext.HttpContext.Request.QueryString[key];
                }
            }

            var link = HtmlHelper.GenerateLink(Context.RequestContext, RouteTable.Routes, column.DisplayName, null, null, null, routeValues, null);
            RenderText(link);
        }
        else
        {
            base.RenderHeaderText(column);
        }
    }
}

...然后替换

                if(! routeValues.ContainsKey(key))
                {
                    routeValues[key] = Context.RequestContext.HttpContext.Request.QueryString[key];
                }

...与routeValues[key] = Context.RequestContext.HttpContext.Request.QueryString[key];

并像这样使用新的渲染:

@Html.Grid()...RenderUsing(new CustomTableGridRenderer())