Question

我在页面加载时有DropDownList iniwhich它会将所有数据加载到其中，但是当用户想要更改显示的文本时，只需单击下拉列表并选择新文本。我的问题是如何制作它以便保存他们选择的新文本值？这就是我现在所拥有的：

Private Sub cboCure_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboCure.SelectedIndexChanged

    cboCure.AutoPostBack = True

    Dim objXMLDoc As New System.Xml.XmlDocument
    Dim objNodeList As System.Xml.XmlNodeList

    Dim strXML As String = ""
    Dim url As String = ""
    MaterialStuff = New Message.Material

    Dim code As String = cboCure.SelectedItem.Text

    cboCure.Items.Clear()
    If cboCure.Items.Count < 1 Then
        strXML = Message.GetCureCodes

        objXMLDoc.LoadXml(strXML)

        objNodeList = objXMLDoc.GetElementsByTagName("Material_Cure")

        cboCure.Items.Add("")

        For Each childNode As System.Xml.XmlNode In objNodeList.Item(0).ChildNodes
            cboCure.Items.Add(New System.Web.UI.WebControls.ListItem(childNode.SelectSingleNode("CureCodeLetter").InnerText,
                childNode.SelectSingleNode("CureCode").InnerText))
        Next

    End If

    cboCure.SelectedItem.Text = code

End Sub

我希望变量code成为用户点击的新文本值，但我似乎无法正确显示它，它会一直显示为""或最初显示的值当页面加载时。

编辑：

这是我的Page_Load

 If Not Page.IsPostBack Then

    ...code

 else
    cboCure_SelectedIndexChanged(sender, e )

 end if

制作下拉列表，保存用户选择的新值

0 个答案: