無法在ASP.NET MVC 4中創建任何局部視圖？

Question

嘗試加載部分視圖時出現此錯誤，但我不知道問題是什么：

System.InvalidOperationException：傳遞到字典中的模型項的類型為“ CDB.OrderM”，但是此字典需要類型為“ System.Collections.Generic.IEnumerable” 1 [CDB.tblItem]”的模型項。

public ActionResult Index()
        {
            OrderM om = new OrderM();
            List<tblItem> tList = db.Query<tblItem>("Select * from tblItem").ToList<tblItem>();
            ViewBag.tList = tList;
            return View(om);
        }

        public ActionResult Reqitem()
        {
            //tblItem ti= db.Query<tblItem>("select * from tblItem");
            var ti = db.Query<tblItem>("select * from tblItem");
            return PartialView("_rawmat",ti);
        }


My Partial View codes are-


 @model IEnumerable<CDB.tblItem>

    <p>
        @Html.ActionLink("Create New", "Create")
    </p>
    <table>
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.ItemId)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.ItemName)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.MeasuringUnit)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Rate)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Quantity)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.BagSz)
            </th>
            <th></th>
        </tr>

    @foreach (var item in Model) {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.ItemId)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.ItemName)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.MeasuringUnit)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Rate)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Quantity)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.BagSz)
            </td>
            <td>
                @Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
                @Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ }) |
                @Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
            </td>
        </tr>
    }

    </table>

和索引視圖代碼是...

@model CDB.OrderM

@{
    ViewBag.Title = "Index";
    var tList = ViewBag.tList;
}

<h2>Index</h2>

@using (Html.BeginForm())
{
    @Html.ValidationSummary(true)

    <fieldset>
        <legend>OrderM</legend>

        <div class="editor-label">
            @Html.LabelFor(model => model.OdrId)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.OdrId)
            @Html.ValidationMessageFor(model => model.OdrId)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.OrderNo)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.OrderNo)
            @Html.ValidationMessageFor(model => model.OrderNo)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.OdrDate)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.OdrDate)
            @Html.ValidationMessageFor(model => model.OdrDate)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.OdrQty)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.OdrQty)
            @Html.ValidationMessageFor(model => model.OdrQty)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.OdrAmount)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.OdrAmount)
            @Html.ValidationMessageFor(model => model.OdrAmount)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.DDate)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.DDate)
            @Html.ValidationMessageFor(model => model.DDate)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.CId)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.CId)
            @Html.ValidationMessageFor(model => model.CId)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Pod)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Pod)
            @Html.ValidationMessageFor(model => model.Pod)
        </div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
@Html.Partial("_rawmat")
}
<div>
    @Html.ActionLink("Back to List", "Index")
</div>

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

Answer 1

看起來您想要執行的操作是將@Html.Partial("_rawmat")更改為@Html.Action("Reqitem") 。 這是因為您的原始語句說直接進入視圖，並且由於您尚未傳遞模型，因此它將傳遞與包含該視圖的視圖相同的模型。

因此，如果在索引視圖上使用@Html.Partial("_rawmat") ，它將傳遞其具有OrderM類型的OrderM ，而實際上不會調用您編寫的操作。

Answer 2

我不知道為什么你們的人會丟失可用的語法來調用模型的局部視圖

{@Html.RenderPartial("_PartialView",List<CDB.tblItem>) }

我假設局部視圖使用List<CDB.tblItem>類型的Model。

如果要用任何值填充模型。 在上述語法使用之前

@{

//code to populate your model

}

Answer 3

如果您的局部視圖需要一個列表，則可以像這樣更改方法...

public ActionResult Reqitem()
        {
            //tblItem ti= db.Query<tblItem>("select * from tblItem");
            var ti = db.Query<tblItem>("select * from tblItem").ToList();//notice to List
            return PartialView("_rawmat",ti);
        }

我已經將.ToList()添加到查詢的末尾。

Answer 4

我認為問題出在Index內@Html.Partial("_rawmat")的第二次調用中。

它沒有傳遞模型參數，因此傳遞了默認參數CDB.OrderM 。

改用它（它呈現操作而不是局部視圖）：

@Html.Action("Reqitem")