Hi all, how can i findcontrol in GridTableView when i click button "Next"
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" GridLines="None"
ShowGroupPanel="True" Skin="Outlook" OnDetailTableDataBind="RadGrid1_DetailTableDataBind"
HorizontalAlign="Left" DataMember="T_Company"
onitemcommand="RadGrid1_ItemCommand"
onneeddatasource="RadGrid1_NeedDataSource"
onitemdatabound="RadGrid1_ItemDataBound" onprerender="RadGrid1_PreRender">
<ClientSettings AllowDragToGroup="True">
</ClientSettings>
<MasterTableView Name="abc_" AutoGenerateColumns="false" AllowMultiColumnSorting="True" GridLines="Horizontal"
DataKeyNames="CompanyID" DataMember="T_Company"
GroupsDefaultExpanded="true">
<ParentTableRelation>
<telerik:GridRelationFields DetailKeyField="CustomerID" MasterKeyField="CustomerID" />
</ParentTableRelation>
<ExpandCollapseColumn Visible="True">
</ExpandCollapseColumn>
<Columns>
<telerik:GridBoundColumn DataField="CompanyName" HeaderText="Dịch Vụ" UniqueName="column2">
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn DataField="Deposit" HeaderText="Đặt Cọc" UniqueName="column">
<EditItemTemplate>
<asp:Label ID="DepositLabel" runat="server" Text='<%# Eval("Deposit") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="DepositTextBox" runat="server" Text='<%# Bind("Deposit") %>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn UniqueName="column1" HeaderText="Người Thanh Toán">
<EditItemTemplate>
</EditItemTemplate>
<ItemTemplate>
<asp:DropDownList ID="DropDownList2" runat="server" DataSourceID="SqlDataSource1"
DataTextField="GuiderName" DataValueField="GuiderID">
</asp:DropDownList>
</ItemTemplate>
</telerik:GridTemplateColumn>
</Columns>
<DetailTables>
<telerik:GridTableView Name="show_" runat="server" Visible="true" DataKeyNames="CompanyID"
DataMember="CompanyID" Width="100%" AutoGenerateColumns="false" GridLines="Horizontal"
ShowFooter="True" Font-Bold="False" Font-Italic="False"
Font-Overline="False" Font-Strikeout="False" Font-Underline="False"
ForeColor="Blue">
<ParentTableRelation>
<telerik:GridRelationFields DetailKeyField="CompanyID" MasterKeyField="CompanyID" />
</ParentTableRelation>
<Columns>
<telerik:GridTemplateColumn DataField="OrderID" HeaderText="ID" UniqueName="column1">
<EditItemTemplate>
<asp:TextBox ID="OrderIDTextBox" runat="server" Text='<%# Bind("OrderID") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="OrderIDLabel" runat="server" Text='<%# Eval("OrderID") %>'></asp:Label>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="ProvideName" HeaderText="Dịch Vụ" UniqueName="column2">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="CurrentPrice" HeaderText="Đơn Giá" UniqueName="column3">
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn DataField="BookQty" HeaderText="SL Dự Kiến" UniqueName="column4">
<EditItemTemplate>
<asp:TextBox ID="BookQtyTextBox" runat="server" Text='<%# Bind("BookQty") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="BookQtyLabel" runat="server" Text='<%# Eval("BookQty") %>'></asp:Label>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn DataField="PriceOper" HeaderText="TT Dự Kiến" UniqueName="column5">
<EditItemTemplate>
<asp:TextBox ID="PriceOperTextBox" runat="server" Text='<%# Bind("PriceOper") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="PriceOperLabel" runat="server" Text='<%# Eval("PriceOper") %>'></asp:Label>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn DataField="CurrentQty" HeaderText="SL thực Tế" UniqueName="column6"
DataType="System.Int32">
<EditItemTemplate>
<asp:Label ID="CurrentQtyLabel" runat="server" Text='<%# Eval("CurrentQty") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="CurrentQtyTextBox" runat="server" Width="50" Text='<%# Eval("CurrentQty") %>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn DataField="CurrentPay" HeaderText="TT Thực Tế" UniqueName="column7"
DataType="System.Int32">
<EditItemTemplate>
<asp:Label ID="CurrentPayLabel" runat="server" Text='<%# Eval("CurrentPay") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="CurrentPayTextBox" runat="server" Width="50" Text='<%# Eval("CurrentPay") %>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="DifferenceQty" HeaderText="SL Phát Sinh" UniqueName="column9">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="DifferencePrice" HeaderText="CP Phát Sinh" UniqueName="column10">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="TotalPrice" HeaderText="Thành Tiền" UniqueName="column11">
</telerik:GridBoundColumn>
</Columns>
<FooterStyle Font-Bold="True" Font-Italic="False" Font-Overline="False" Font-Strikeout="False"
Font-Underline="False" ForeColor="Red" Wrap="True" />
</telerik:GridTableView>
</DetailTables>
</MasterTableView>
</telerik:RadGrid>
<asp:Button ID="Button1" runat="server" Text="Next"
onclick="Button1_Click" />
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" GridLines="None"
ShowGroupPanel="True" Skin="Outlook" OnDetailTableDataBind="RadGrid1_DetailTableDataBind"
HorizontalAlign="Left" DataMember="T_Company"
onitemcommand="RadGrid1_ItemCommand"
onneeddatasource="RadGrid1_NeedDataSource"
onitemdatabound="RadGrid1_ItemDataBound" onprerender="RadGrid1_PreRender">
<ClientSettings AllowDragToGroup="True">
</ClientSettings>
<MasterTableView Name="abc_" AutoGenerateColumns="false" AllowMultiColumnSorting="True" GridLines="Horizontal"
DataKeyNames="CompanyID" DataMember="T_Company"
GroupsDefaultExpanded="true">
<ParentTableRelation>
<telerik:GridRelationFields DetailKeyField="CustomerID" MasterKeyField="CustomerID" />
</ParentTableRelation>
<ExpandCollapseColumn Visible="True">
</ExpandCollapseColumn>
<Columns>
<telerik:GridBoundColumn DataField="CompanyName" HeaderText="Dịch Vụ" UniqueName="column2">
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn DataField="Deposit" HeaderText="Đặt Cọc" UniqueName="column">
<EditItemTemplate>
<asp:Label ID="DepositLabel" runat="server" Text='<%# Eval("Deposit") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="DepositTextBox" runat="server" Text='<%# Bind("Deposit") %>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn UniqueName="column1" HeaderText="Người Thanh Toán">
<EditItemTemplate>
</EditItemTemplate>
<ItemTemplate>
<asp:DropDownList ID="DropDownList2" runat="server" DataSourceID="SqlDataSource1"
DataTextField="GuiderName" DataValueField="GuiderID">
</asp:DropDownList>
</ItemTemplate>
</telerik:GridTemplateColumn>
</Columns>
<DetailTables>
<telerik:GridTableView Name="show_" runat="server" Visible="true" DataKeyNames="CompanyID"
DataMember="CompanyID" Width="100%" AutoGenerateColumns="false" GridLines="Horizontal"
ShowFooter="True" Font-Bold="False" Font-Italic="False"
Font-Overline="False" Font-Strikeout="False" Font-Underline="False"
ForeColor="Blue">
<ParentTableRelation>
<telerik:GridRelationFields DetailKeyField="CompanyID" MasterKeyField="CompanyID" />
</ParentTableRelation>
<Columns>
<telerik:GridTemplateColumn DataField="OrderID" HeaderText="ID" UniqueName="column1">
<EditItemTemplate>
<asp:TextBox ID="OrderIDTextBox" runat="server" Text='<%# Bind("OrderID") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="OrderIDLabel" runat="server" Text='<%# Eval("OrderID") %>'></asp:Label>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="ProvideName" HeaderText="Dịch Vụ" UniqueName="column2">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="CurrentPrice" HeaderText="Đơn Giá" UniqueName="column3">
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn DataField="BookQty" HeaderText="SL Dự Kiến" UniqueName="column4">
<EditItemTemplate>
<asp:TextBox ID="BookQtyTextBox" runat="server" Text='<%# Bind("BookQty") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="BookQtyLabel" runat="server" Text='<%# Eval("BookQty") %>'></asp:Label>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn DataField="PriceOper" HeaderText="TT Dự Kiến" UniqueName="column5">
<EditItemTemplate>
<asp:TextBox ID="PriceOperTextBox" runat="server" Text='<%# Bind("PriceOper") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="PriceOperLabel" runat="server" Text='<%# Eval("PriceOper") %>'></asp:Label>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn DataField="CurrentQty" HeaderText="SL thực Tế" UniqueName="column6"
DataType="System.Int32">
<EditItemTemplate>
<asp:Label ID="CurrentQtyLabel" runat="server" Text='<%# Eval("CurrentQty") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="CurrentQtyTextBox" runat="server" Width="50" Text='<%# Eval("CurrentQty") %>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn DataField="CurrentPay" HeaderText="TT Thực Tế" UniqueName="column7"
DataType="System.Int32">
<EditItemTemplate>
<asp:Label ID="CurrentPayLabel" runat="server" Text='<%# Eval("CurrentPay") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="CurrentPayTextBox" runat="server" Width="50" Text='<%# Eval("CurrentPay") %>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="DifferenceQty" HeaderText="SL Phát Sinh" UniqueName="column9">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="DifferencePrice" HeaderText="CP Phát Sinh" UniqueName="column10">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="TotalPrice" HeaderText="Thành Tiền" UniqueName="column11">
</telerik:GridBoundColumn>
</Columns>
<FooterStyle Font-Bold="True" Font-Italic="False" Font-Overline="False" Font-Strikeout="False"
Font-Underline="False" ForeColor="Red" Wrap="True" />
</telerik:GridTableView>
</DetailTables>
</MasterTableView>
</telerik:RadGrid>
<asp:Button ID="Button1" runat="server" Text="Next"
onclick="Button1_Click" />