构建多选用户控件时出现问题

Question

我正在构建一个多选用户控件 vb.net我在填充我创建的多选项时遇到以下问题。示例代码如下

SumoSelect（） 的 Javascript 是客户端，一切都在工作，我唯一需要的是以编程方式设置选定的值或不:)

https://hemantnegi.github.io/jquery.sumoselect/

Multiselect.ascx

      Property SelectedValues() As String()
      Get
         Return selValues.Value.Split(",")
      End Get
      Set(value As String())
         For i As Integer = 0 To value.Length - 1
             If i = 0 Then
                 selValues.Value = value(i)
             Else
                 selValues.Value += "," + value(i)
             End If
         Next
     End Set
   End Property       

    Sub New()
       Items = New Dictionary(Of Object, Object)
    End Sub

    Public Items As Dictionary(Of Object, Object)
    Private Function CreateItems() As String
        Dim sb As New StringBuilder()
        For Each item In Items
           sb.AppendFormat("<option value=""{0}"">{0}</option>", item.Key, item.Value)
        Next
    Return sb.ToString()
End Function
'' selValues is a HiddenField clientside

设置所选值：

MultiSelect1.SelectedValues() = New String() {"Banana Color", "Green Color", "Juice Color"}

人口：

 For Each item In PjtColor.Fetch(Nothing, Nothing, Nothing, Nothing)
      MultiSelect1.Items.Add(item.ColorName, item.ColorName)
 Next

我需要比较选定值（字符串数组）和项目（字典）将sb.AppendFormat("<option value=""{0}"" selected=""selected"">{0}</option>", item.Key, item.Value)设置为"已选中"，当不匹配时

sb.AppendFormat("<option value=""{0}"">{0}</option>", item.Key, item.Value)

基于： http://hemantnegi.github.io/jquery.sumoselect/sumoselect_demo.html

我将其渲染为文本，该文本输出<select></select>内的<options></option>

提前谢谢。

Answer 1

这是我的问题

    For i As Integer = 0 To SelectedValues.Count - 1
        SelectedItems.Add(SelectedValues(i), SelectedValues(i))
    Next
    For Each item In Items
        If SelectedItems.ContainsKey(item.Key) Then
            sb.AppendFormat("<option value=""{0}"" selected=""selected"">{0}</option>", item.Key, item.Value)
        Else
            sb.AppendFormat("<option value=""{0}"">{0}</option>", item.Key, item.Value)
        End If
    Next