我创建了具有列表框和文本框的动态 Web 用户控件。但是，回发后列表框中的数据会丢失，但文本框中的数据不会。
我已经阅读了很多关于 Web 用户控件的论坛和页面，并且我了解 Web 用户控件在此类回发后会重新创建。
你能告诉我在回发之前获取列表框数据的方法吗？
非常感谢'-------------------------------------- 请注意：我的网络用户控件有一个列表和文本框，用户可以通过在文本框中输入值来为列表框添加值（我在 javascripts 中编写了将数据从文本框添加到列表框的函数）。
但是，在主页面中，当我单击一个按钮保存列表数据时，我的所有页面和我的 Web 用户控件都被重新加载，因此列表框中的数据也消失了:-(
添加网页用户控件的代码VB：
Private Sub WebFormTestValidation_Init(sender As Object, e As EventArgs) Handles Me.Init
Dim ctrList As wucListPerson
ctrList = LoadControl("wucListPerson.ascx")
Me.Panel1.Controls.Add(ctrList)
ctrList.ID = "wucDynamic"
ctrList.wucName = "DYNAMIC TEST"
ctrList.wucInfo = "DYNAMIC TEST"
End Sub
'------------
网页用户控件代码VB
Public Class wucListPerson
Inherits System.Web.UI.UserControl
Public Property lstPersons As List(Of String)
Get
Dim lst As New List(Of String)
If lstFullName.Items.Count > 0 Then
For i = 0 To lstFullName.Items.Count - 1
lst.Add(CStr(lstFullName.Items(i).Value))
Next
End If
Return lst
End Get
Set(ByVal lstValues As List(Of String))
If lstValues.Count > 0 Then
For i = 0 To lstValues.Count - 1
Dim strArr As String() = Split(CStr(lstValues.Item(i)), "*")
Ordre.Text = CStr(strArr(0))
Nom.Text = strArr(1)
Prenom.Text = strArr(2)
hdfIdPersonne.Value = strArr(3)
Dim item As New System.Web.UI.WebControls.ListItem
item.Text = strArr(0) + "." + strArr(1) + " " + strArr(2)
item.Value = CStr(lstValues.Item(i))
lstFullName.Items.Add(item)
Next
End If
End Set
End Property
Public Property wucName As String
Get
Return lblName.Text
End Get
Set(ByVal value As String)
lblName.Text = value
End Set
End Property
Public Property wucInfo As String
Get
Return Info.Text
End Get
Set(ByVal value As String)
Info.Text = value
End Set
End Property
Public Sub addPersonne(ByVal ordre As Integer, ByVal nom As String, ByVal prenom As String, idpersonne As Integer)
'lstName.Items.Add(CStr(ordre) + "." + nom + " " + prenom, CStr(ordre) + "*" + nom + "*" + prenom + "*" + CStr(idpersonne))
Dim item As New System.Web.UI.WebControls.ListItem
item.Text = CStr(ordre) + "." + nom + " " + prenom
item.Value = CStr(ordre) + "*" + nom + "*" + prenom + "*" + CStr(idpersonne)
lstFullName.Items.Add(item)
End Sub
Public Function getList() As List(Of String)
Dim lst As New List(Of String)
If lstFullName.Items.Count > 0 Then
For i = 0 To lstFullName.Items.Count - 1
lst.Add(CStr(lstFullName.Items(i).Value))
Next
End If
Return lst
End Function
Public Sub SetList(ByVal lst As List(Of String))
If lst.Count > 0 Then
For i = 0 To lst.Count - 1
Dim strArr As String() = Split(CStr(lst.Item(i)), "*")
Ordre.Text = CStr(strArr(0))
Nom.Text = strArr(1)
Prenom.Text = strArr(2)
hdfIdPersonne.Value = strArr(3)
Dim item As New ListItem
item.Text = strArr(0) + "." + strArr(1) + " " + strArr(2)
item.Value = CStr(lst.Item(i))
lstFullName.Items.Add(item)
Next
End If
End Sub
Protected uniqueKey As String
Private Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
'If Not Page.IsPostBack Then
' lblName.Text = wucName
'End If
Me.uniqueKey = Guid.NewGuid.ToString("N")
Me.cmdRight.Attributes("onclick") = ("RemoveItem_" + (uniqueKey + "(); return false;"))
Me.cmdLeft.Attributes("onclick") = ("AddItem_" + (uniqueKey + "(); return false;"))
Me.cmdInfor.Attributes("onclick") = ("showHideInfor_" + (uniqueKey + "(); return false;"))
If Trim(lblName.Text) = "" Then cmdInfor.Visible = False
End Sub
End Class
'------------------------ 编写 Javascript 代码以从文本框中获取/删除数据到列表
//====================
function getMaxOrdre_<%=uniqueKey%>() {
var listName = document.getElementById("<%=lstFullName.ClientID()%>");
var lst = listName.options;
var count = lst.length;
if (lst.length == 0) {
return 0;
}
var max = 0;
for (var i = 0; i < count; i++) {
var item = lst[i].value;
var FName = getFullName_<%=uniqueKey%>(item);
if (parseInt(FName.Ordre) > max) {
max = FName.Ordre;
}
}
return max;
}
//===================
function getFullName_<%=uniqueKey%>(FullName) {
if (FullName.length != "0") {
var temp = new Array();
temp = FullName.split('*');
return { Ordre: temp[0], Nom: temp[1], PreNom: temp[2], IdPersonne: temp[3] };
}
return { Ordre: 0, Nom: '', PreNom: '', IdPersonne: '0' };
}
//===================
function AddItem_<%=uniqueKey %>() {
//lstName.BeginUpdate();
var txtOrdre = document.getElementById("<%=Ordre.ClientID()%>");
var txtNom = document.getElementById("<%=Nom.ClientID()%>");
var txtPrenom = document.getElementById("<%=Prenom.ClientID()%>");
var hdfIdPerson = document.getElementById("<%=hdfIdPersonne.ClientID%>");
var listName = document.getElementById("<%=lstFullName.ClientID()%>");
var index = listName.selectedIndex;
var lst = listName.options;
var ordre = txtOrdre.value;
var nom = txtNom.value;
var prenom = txtPrenom.value;
var idPerson = hdfIdPerson.value;
if ((nom.length > 0) || (prenom.length > 0)) {
var selectBoxOption = document.createElement("option");//create new option
selectBoxOption.value = ordre + '*' + nom + '*' + prenom + '*' + idPerson;//set option value
selectBoxOption.text = ordre + '.' + nom + ' ' + prenom;//set option display text
listName.add(selectBoxOption, null);//add created option to select box.
};
// lstName.EndUpdate();
//get deafault data
var ordreMax = getMaxOrdre_<%=uniqueKey%>();
txtOrdre.value = parseInt(ordreMax) + 1;
txtNom.value = '';
txtPrenom.value = '';
hdfIdPerson.value = '0';
}
//===================
function RemoveItem_<%=uniqueKey %>() {
//lstName.BeginUpdate();
var txtOrdre = document.getElementById("<%=Ordre.ClientID()%>");
var txtNom = document.getElementById("<%=Nom.ClientID()%>");
var txtPrenom = document.getElementById("<%=Prenom.ClientID()%>");
var hdfIdPerson = document.getElementById("<%=hdfIdPersonne.ClientID%>");
var listName = document.getElementById("<%=lstFullName.ClientID()%>");
var index = listName.selectedIndex;
var lst = listName.options;
if (index >= 0) {
var FName = getFullName_<%=uniqueKey %>(lst[index].value);
txtOrdre.value = FName.Ordre;
txtNom.value = FName.Nom;
txtPrenom.value = FName.PreNom;
hdfIdPerson.value = FName.IdPersonne;
listName.remove(index);
}
}