Text Value in a TextBox inside Datagrid

[ismaelf]

i have a textbox in a template column in a datagrid, it displays the
initial value of the row, but when i change it remains with the
original value (it doesnt get the new value..)
i fill the CartTable programmatically with rows from a database binded
datagrid..
i cant figure out what is wroooong! hehe thanks for helping
here is my code:

TABLE CODE (in the page_load):
If Session("shop_cart") Is Nothing Then
CartTable = New DataTable
CartTable.Columns.Add(New DataColumn("Product", GetType(String)))
CartTable.Columns.Add(New DataColumn("Line", GetType(String)))
CartTable.Columns.Add(New DataColumn("Description", GetType(String)))
CartTable.Columns.Add(New DataColumn("Quantity", GetType(String)))
CartTable.Columns.Add(New DataColumn("Price", GetType(String)))
CartTable.Columns.Add(New DataColumn("Total", GetType(String)))
ession("shop_cart") = CartTable
Else
CartTable = Session("shop_cart")
End If
BindBuy() 'this assign the datasource and execute DataBind()


DATAGRID CODE:
<asp:datagrid id="dgBuy" style="Z-INDEX: 103; LEFT: 80px; POSITION:
absolute; TOP: 576px" runat="server"
BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px"
BackColor="White" CellPadding="3"
Width="712px" AllowPaging="True" Font-Names="Tahoma"
Font-Size="X-Small" AutoGenerateColumns="False">
<SelectedItemStyle Font-Bold="True" ForeColor="White"
BackColor="#669999"></SelectedItemStyle>
<ItemStyle ForeColor="#000066"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="White"
BackColor="#006699"></HeaderStyle>
<FooterStyle ForeColor="#000066" BackColor="White"></FooterStyle>
<Columns>
<asp:ButtonColumn Text="Delete"
CommandName="Delete"></asp:ButtonColumn>
<asp:BoundColumn DataField="Product"
HeaderText="Product"></asp:BoundColumn>
<asp:BoundColumn DataField="Line"
HeaderText="Line"></asp:BoundColumn>
<asp:BoundColumn DataField="Description"
HeaderText="Description"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="Quantity">
<ItemTemplate>
<asp:TextBox id=txtQty runat="server" Width="40px" Text='<%#
DataBinder.Eval(Container.DataItem, "Quantity") %>' >
</asp:TextBox>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="Price" HeaderText="Price"
DataFormatString="{0:c}"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="Total">
<ItemTemplate>
<p align="right">
<asp:Label runat="server" Text='<%#
System.String.Format("{0:c}",CalcTotal(Int32.Parse(DataBinder.Eval(Container.DataItem,
"Quantity")),DataBinder.Eval(Container.DataItem, "Price"))) %>'
ID="Label8"/>
</p>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle HorizontalAlign="Left" ForeColor="#000066"
BackColor="Silver" Mode="NumericPages"></PagerStyle>
</asp:datagrid>

UPDATE BUTTON CODE:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button2.Click
Dim i As Integer
Dim _item As DataGridItem
Dim dr As DataRow

For i = 0 To dgBuy.Items.Count - 1

_item = dgBuy.Items(i)
Dim qtyTextBox As TextBox = _item.FindControl("txtQty")
dr = CartTable.Rows(i)
dr(3) = qtyTextBox.Text

Next
BindBuy()

End Sub

 

[Guest]

Make sure viewstate is on the page. Also, likely you'll only want to
populate the grid when "not page.ispostback", otherwise you'll be overwriting
any changes made to the data in the boxes.

 

[ismaelf]

thanks, i populate the table under not page.ispostback now.. and verify
the ViewState also and its enabled.. but i still have the same problem
of the textbox..