Check the File size while uploading file using FileUploadControl

Client Side Code :

<asp:FileUpload ID="flimgupload" runat="server" />

                <asp:RegularExpressionValidator ID="RegularExpressionValidator6" runat="server"

                    ErrorMessage="Image Extention Should be .jpg|.gif|.jpeg"

                    ControlToValidate="flimgupload"

                   

                    ValidationExpression="^.*\.((j|J)(p|P)(e|E)?(g|G)|(g|G)(i|I)(f|F)|(p|P)(n|N)(g|G))$"

                    Display="Dynamic"></asp:RegularExpressionValidator>

                    <asp:CustomValidator ID="CustomValidator1" runat="server"

                    ErrorMessage="Image Size Should not exceed 100 K"

                    OnServerValidate = "CustomValidator1_ServerValidate" Display="Dynamic"

                    ControlToValidate="flimgupload"></asp:CustomValidator>

Server Side Code :

 protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)

        {

            if (args.IsValid)

            {

                if (flimgupload.PostedFile.ContentLength > 102400)

                {

                    args.IsValid = false;

                }

            }

        }