索引视图渲染时出现异常

Question

索引视图渲染时抛出此异常：

"InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first."

这是索引视图：

@foreach (var item in Model) {
<tr>
    <td>

        @Html.DisplayFor(modelItem => item.pageGroup.GroupTitle)

    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Title)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.ShortDescription)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Text)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.ShowInSlider)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.ImageName)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Visit)
    </td>
    <td>
       
        @item.CreateData.ToShamsi();
    </td>
    <td>
        @Html.ActionLink("Edit", "Edit", new { id=item.PageID }) |
        @Html.ActionLink("Details", "Details", new { id=item.PageID }) |
        @Html.ActionLink("Delete", "Delete", new { id=item.PageID })
    </td>
</tr> }

以及这一行中抛出的异常：

@Html.DisplayFor(modelItem => item.pageGroup.GroupTitle)

问题出在哪里？

如果你感到困惑，告诉我把你想要的部分的代码放在上面

这是我的连接字符串：

<connectionStrings>
<add name="MyCmsContext" connectionString="data source=.;    initial catalog=MyCmsDB;persist security info=True;     Integrated Security=True; " providerName="System.Data.SqlClient" MultipleActiveResultSets="true"  />

Answer 1

您需要在连接字符串中允许 MARS。将MultipleActiveResultSets=true 添加到连接字符串的提供者部分。

"Server=xxxx;Database=xxxxx;xxxxx MultipleActiveResultSets=true"