C# - Find A Control Placed Inside A Panel?

Nov 21, 2010

I have a button inside a Panel. I'm trying to find the id of the button, but my code doesn't work:

protected void pnl_nocutomer_Load(object sender, EventArgs e)
{
Button btn;

[code]...

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I am developing a asp database that is linked with SQL Database. When I am tryind to Find Control (GridView2) inside of another control (Panel2) that sits in Item Template for DetailsView, I got an error message:

Object reference not set to an instance of an object.
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DataSourceID="SqlDataSource1" GridLines="None"
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OnItemInserted="DetailsView1_OnInsert"
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>
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<asp:BoundField DataField="pk_BackupDriveSerial" ControlStyle-CssClass="dropdownsize"
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</asp:BoundField>
<asp:BoundField DataField="BackupDriveMake" HeaderText="Make" ControlStyle-CssClass="dropdownsize"
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<ControlStyle CssClass="dropdownsize"></ControlStyle>
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<asp:BoundField DataField="BackupDriveModel" HeaderText="Model" ControlStyle-CssClass="dropdownsize"
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<asp:TemplateField HeaderText="Type" SortExpression="fkid_BackupDriveTypes" ControlStyle-CssClass="dropdownsize"
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<EditItemTemplate>
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<br />
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<br />
<asp:Panel ID="Panel2" runat="server" CssClass="dropdownpanel" >
<asp:GridView CssClass="dropdowngrid" ID="GridView2" runat="server" AutoGenerateColumns="False"
CellPadding="4" DataKeyNames="pkid_BackupDriveTypes" SelectedValue='<%# Bind("fkid_BackupDriveTypes") %>'
DataSourceID="SqlDataSource3" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView2_OnChange">
<RowStyle BackColor="#EFF3FB" />
<Columns>
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<asp:BoundField DataField="BackupDriveMake" HeaderText="Make"
SortExpression="Make" />
<asp:BoundField DataField="BackupDriveModel" HeaderText="Model"
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<asp:CommandField ShowSelectButton="True" />
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<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
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<AlternatingRowStyle BackColor="White" />
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</EditItemTemplate>

[Code]....

I also tried

[Code]....

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[Code]....

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[Code]....

[Code]....

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[Code]....

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[Code]....

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<asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server">
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[code]....

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