asp.net-mvc - WebGrid中具有模型IEnumerable 和T.boolValue的CheckBoxFor

Question

我一直在努力工作。我想显示模型中特定字段的复选框。我的 View 有一个IEnumerable作为@model:

@model IEnumerable<DFIMAX_MVC4.NCSJServices.AxdEntity_LedgerJournalTrans>
@{
    ViewBag.Title = "ledgerJournalTrans";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>
    Sagslinjer</h2>
<p>
    @Html.ActionLink("Create New", "Create")
</p>
<div>
    @{
        var grid = new WebGrid(source: Model, defaultSort: "Name");
        var cols = grid.Columns(
               grid.Column(header: "", style: "ColPost", format: (item) => item.GetSelectLink("Bogfør")),
               grid.Column(header: "", style: "ColDelete", format: (item) => @Html.ActionLink("Slet", "Delete", new { id = item.RecId })),
               grid.Column(header: "", style: "ColEdit", format: (item) => @Html.ActionLink("Ret", "Edit", new { id = item.RecId })),
           grid.Column("NCPosted", style: "ColPosted", header: "Bogført", format: (item) => @Html.CheckBoxFor(item.NCPosted)),
               grid.Column("TransDate", style: "ColDate", header: "Dato", format: (item) => item.TransDate != null
                   ? item.TransDate.ToString("dd-mm-yyyy") : ""),
               grid.Column("NCCaseNumber", style: "ColCase", header: "Sag"),
               grid.Column("Approver", style: "ColInitials", header: "Init."),
               grid.Column("AccountType", style: "ColAccountType", header: "Type"),
               grid.Column("LedgerDimension.DisplayValue", header: "Part/Konto", style: "ColAccount"),
            //grid.Column("Art", header: "Art"),
               grid.Column("Txt", style: "ColTxt", header: "Reference"),
               grid.Column("Voucher", style: "ColVoucher", header: "Bilag"),
            //grid.Column("AmountCurDebit", header: "Debit", format: (item) => string.Format("{0:C}", item.AmountCurDebit)),
            //grid.Column("AmountCurCredit", header: "Kredit", format: (item) => string.Format("{0:C}", item.AmountCurCredit))
               grid.Column(columnName: "Amount", header: "Beløb", style: "ColAmount",
               format: (item) => string.Format("{0:C}", (item.AmountCurDebit != null ? item.AmountCurDebit : 0) - (item.AmountCurCredit != null ? item.AmountCurCredit : 0)))
           );
    }
    @grid.Table(
            columns: cols,
            footer: @<table class="footer">
                <tr>
                    <td class="ColPost">
                        Total
                    </td>
                    <td class="ColDelete">
                    </td>
                    <td class="ColEdit">
                    </td>
                    <td class="ColPosted">
                    </td>
                    <td class="ColApproved">
                    </td>
                    <td class="ColDate">
                    </td>
                    <td class="ColCase">
                    </td>
                    <td class="ColInitials">
                    </td>
                    <td class="ColAccountType">
                    </td>
                    <td class="ColAccount">
                    </td>
                    <td class="ColTxt">
                    </td>
                    <td class="ColVoucher">
                    </td>
                    <td class="ColAmount">
                        Totalbeløb
                    </td>
                </tr>
            </table>,
            tableStyle: "TransListTable",
            headerStyle: "TranslistHeader",
            footerStyle: "TransListFooter",
            alternatingRowStyle: "TransListAlternatingRow",
            selectedRowStyle: "TransListSelectedRow",
            rowStyle: "TransListRow")
</div>

问题是这一行:

grid.Column("NCPosted", style: "ColPosted", header: "Bogført", format: (item) => @Html.CheckBoxFor(item.NCPosted)),

产生的错误是这样的:

Compiler Error Message: CS1973: 'System.Web.Mvc.HtmlHelper>' has no applicable method named 'CheckBoxFor' but appears to have an extension method by that name. Extension methods cannot be dynamically dispatched. Consider casting the dynamic arguments or calling the extension method without the extension method syntax.

为什么在其他行上使用以下格式:(item)=>可以，但是在此复选框上却不行？

我也尝试过:

grid.Column("NCPosted", style: "ColPosted", header: "Bogført", format: (item) => @Html.CheckBoxFor((bool)item.NCPostedValue)),

产生错误的地方是:

Compiler Error Message: CS1928: 'System.Web.Mvc.HtmlHelper>' does not contain a definition for 'CheckBoxFor' and the best extension method overload 'System.Web.Mvc.Html.InputExtensions.CheckBoxFor(System.Web.Mvc.HtmlHelper, System.Linq.Expressions.Expression>)' has some invalid arguments

任何帮助将非常感激。

亲切的问候，

Answer 1

好的，试试这个:

format: (item) => InputExtensions.CheckBoxFor(Html, item.NCPosted)