[VB.NET]如何取得DATAGIRD裏CHECKBOX和TEXTBOX的值？

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如何取得DATAGIRD裏CHECKBOX和TEXTBOX的值？
我想把DATAGRID的裏的值取出來，放在一個DATATBALE裏，代碼如下：
Public Function dt() As DataTable
Dim i As Integer
Dim j As Integer
Dim dt1 As DataTable = New DataTable
dt1.Columns.Add(New DataColumn( delflg , Type.GetType( System.Boolean )))
dt1.Columns.Add(New DataColumn( txtMtype , Type.GetType( System.String )))
dt1.Columns.Add(New DataColumn( txtBikou , Type.GetType( System.String )))
Dim delflg As Boolean
Dim txtMtype As TextBox
Dim txtBikou As TextBox
Dim listitem As DataGridItem
max_row = Me.dgMeetingtype.Items.Count
For i = 0 To max_row - 1
listitem = Me.dgMeetingtype.Items(i)
If i < max_row - 1 Then
delflg = CType(listitem.FindControl( chkDel ),CheckBox).Checked
End If
txtMtype = CType(listitem.FindControl( txtMtype ), TextBox)
txtBikou = CType(listitem.FindControl( txtBiko ), TextBox)

Dim myRow As DataRow = dt1.NewRow()
myRow(0) = delflg
myRow(1) = txtMtype.Text
myRow(2) = txtBikou.Text
dt1.Rows.Add(myRow)
Next i
Return dt1
End Function

這樣有什麼不對嗎？好像是CHECKBOX和TEXTBOX的值改了，我卻獲取不到，得到的還是綁定DATAGRID時候的值。高手幫幫忙啊~！
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自己頂一下，希望有高手來解決！謝謝了
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TextBox tb=(TextBox)datagrid1.findControl( your TextBoxid );
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嗯，問題已解決。
我的問題出在PAGE_LOAD裏
加一個ISPOSTBACK方法就好了。
謝謝！
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