asp.net下拉控件的数据绑定列表
早上好。 我有一个下拉列表控件,当选择一个特定的项目时,另一个下拉列表将基于该选择填充。背后的代码如下asp.net下拉控件的数据绑定列表,asp.net,vb.net,drop-down-menu,Asp.net,Vb.net,Drop Down Menu,早上好。 我有一个下拉列表控件,当选择一个特定的项目时,另一个下拉列表将基于该选择填充。背后的代码如下 Imports System.IO Partial Class Data Inherits System.Web.UI.Page Private Property _futureslist As List(Of String) Property FuturesList As List(Of String) Get Return _futureslist End
Imports System.IO
Partial Class Data
Inherits System.Web.UI.Page
Private Property _futureslist As List(Of String)
Property FuturesList As List(Of String)
Get
Return _futureslist
End Get
Set(value As List(Of String))
Dim strText As String = File.ReadAllText(HttpContext.Current.Server.MapPath("~/DataFiles/AvailableFutures.txt"))
Dim arytext() As String = strText.Split(",")
For i As Integer = 0 To arytext.Count - 1
value.Add(arytext(i))
Next
_futureslist = value
End Set
End Property
Protected Sub ddlMain_SelectedIndexChanged(sender As Object, e As System.EventArgs) Handles ddlMain.SelectedIndexChanged
If Not IsPostBack Then
If ddlMain.SelectedItem.Text = "Futures" Then
ddlMainsub1.DataSource = _futureslist
ddlMainsub1.DataBind()
End If
End If
End Sub
End Class
创建列表属性所读取的文件格式如下:;
玉米
小麦
咖啡
因此,当主下拉选择项为“Futures”时,第二个下拉值将数据绑定到FuturesList属性。任何帮助都将不胜感激设置“ddlMain”的
AutoPostBack=True
,然后在
Protected Sub ddlMain_SelectedIndexChanged(sender As Object, e As System.EventArgs) Handles ddlMain.SelectedIndexChanged
ddlMainsub1.Items.Clear()
'bound items here to DropDownList2
End Sub
希望能有帮助。祝你好运。可能是你需要删除“如果不是IsPostBack然后”复选框Autopsy?我的.NET版本没有做到这一点。看起来有人的手机上有Autocorrect=true。=)你不知道尸检=自动回邮你成功了吗?