在Table中动态生成的TextBox无法在PostBack时刷新数据

wagezhou 2011-11-29 03:40:57

问题如题，请高手帮忙看看问题在哪？

1.不用Textbox时，在点击DropDownList时，页面PostBack后，Table是可以刷新数据的（代码如下）
test.aspx:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="test.aspx.vb" Inherits="test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">
<asp:ListItem Value="1元">苹果</asp:ListItem>
<asp:ListItem Value="2元">桔子</asp:ListItem>
</asp:DropDownList>
<asp:Table ID="Table1" runat="server">
</asp:Table>
</div>
</form>
</body>
</html>
test.aspx.vb
Partial Class test
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim i As Integer
Dim myRow As New TableRow
For i = 0 To 1
Dim myCell As New TableCell
Select Case i
Case 0
myCell.Text = DropDownList1.SelectedItem.Text
Case 1
myCell.Text = DropDownList1.SelectedItem.Value
End Select
myRow.Cells.Add(myCell)
Next
Table1.Rows.Add(myRow)
End Sub
End Class
2.在Table中动态生成了TextBox，以便我编辑修改的需要，但是在点击DropDownList时，页面PostBack后，页面显示的数据不变（代码如下）：
text1.aspx
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="test1.aspx.vb" Inherits="test1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">
<asp:ListItem Value="1元">苹果</asp:ListItem>
<asp:ListItem Value="2元">桔子</asp:ListItem>
</asp:DropDownList>
<asp:Table ID="Table1" runat="server">
</asp:Table>
</div>
</form>
</body>
</html>
test1.aspx.vb
Partial Class test1
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim i As Integer
Dim myRow As New TableRow
For i = 0 To 1
Dim myCell As New TableCell
Select Case i
Case 0
Dim myTextBox As New TextBox
myTextBox.Text = DropDownList1.SelectedItem.Text
myCell.Controls.Add(myTextBox)
Case 1
Dim myTextBox As New TextBox
myTextBox.Text = DropDownList1.SelectedItem.Value
myCell.Controls.Add(myTextBox)
End Select
myRow.Cells.Add(myCell)
Next
Table1.Rows.Add(myRow)
End Sub
End Class

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