Server Error in '/' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1061: 'ASP.product_aspx' does not contain a definition for 'length_TextChanged' and no extension method 'length_TextChanged' accepting a first argument of type 'ASP.product_aspx' could be found (are you missing a using directive or an assembly reference?)

Source Error:


Line 48: 					<td>
Line 49:                         <asp:SqlDataSource ID="SqlDataSource3" runat="server" ConnectionString="<%$ ConnectionStrings:ketnoi %>" SelectCommand="SELECT * FROM [mong]"></asp:SqlDataSource>
Line 50:                      <asp:TextBox ID="length" OnTextChanged="length_TextChanged" CssClass="length" runat="server"  autoComplete="off" value="0" name="width" type="number" min="0" class="form-control" Text="0">
Line 51: ></asp:TextBox>   </td>
Line 52: 					<td><strong>Chiều rộng : </strong></td>

Source File: c:\inetpub\vhosts\atdesign.com.vn\nhaphohiendai.vn\Product.aspx    Line: 50






Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4667.0