Kendo UI下拉列表

Question

我有一个使用mvc包装器的剑道下拉列表

码

    Html.Kendo.DropDownList() _
        .Name("MainCategories") _
        .HtmlAttributes(New With {.style = "width: 250px"}) _
        .DataTextField("CategoryName") _
        .OptionLabel("Select A Category") _
        .DataValueField("ID") _
        .DataSource(Function(source)
                        source.Read(Function(read) read.Action("GetCategories", "Home"))
                    End Function _
                    ) _
    .Render()


End Code

我在控制器中有功能

Public Function GetCategories() As String

    ' Dim dr As DataRow
    Dim dt As New DataTable
    Dim query As New LibQuery(LibSQL.ConString)
    query.OpenNoTran()
    Dim da As SqlDataAdapter = MainCategories.LoadAllMainCategoriesAdapt(query)
    da.Fill(dt)

    Dim serializer As New System.Web.Script.Serialization.JavaScriptSerializer()

    Dim rows As New List(Of Dictionary(Of String, Object))()
    Dim row As Dictionary(Of String, Object)
    For Each dr As DataRow In dt.Rows
        row = New Dictionary(Of String, Object)()
        For Each col As DataColumn In dt.Columns
            row.Add(col.ColumnName, dr(col))
        Next
        rows.Add(row)
    Next
    Return serializer.Serialize(rows)

    '  Return Json(da, JsonRequestBehavior.AllowGet)

End Function

并通过检查即时通讯返回json结果

[{"ID":1,"CategoryName":"Hair Dressing"},
 {"ID":2,"CategoryName":"Gardening"},
 {"ID":3,"CategoryName":"Animal Care"},
 {"ID":4,"CategoryName":"Accounting"},
 {"ID":5,"CategoryName":"Cleaning"},
 {"ID":6,"CategoryName":"Automotive"},
 {"ID":7,"CategoryName":"Another"},
 {"ID":8,"CategoryName":"Costas Cooking"},
 {"ID":9,"CategoryName":"cvb"},
 {"ID":10,"CategoryName":"cvbcbvcbv"},
 {"ID":11,"CategoryName":"cxxxxx"},
 {"ID":12,"CategoryName":"MVC ABout Is Working"},
 {"ID":13,"CategoryName":"Another MvC"}]

由于某种原因，所有列表值（datatextvalue）在下拉列表中都是“ undefined”，这很奇怪，即时通讯使用我自己的数据库连接文件，应该没问题。 也许是因为我没有使用JsonResult？ 有任何想法吗。

谢谢

Answer 1

您目前似乎以字符串形式返回JSON-带有额外的引号，例如“ [{“ ID”：1}]“。 这是因为您要自己对其进行序列化，而不是将其留给Json（）方法。

尝试使用

Return Json(rows, JsonRequestBehavior.AllowGet)

代替

Return serializer.Serialize(rows)