How to get values
<asp:RadioButton ID="sizeteMB" runat="server" Checked="true" GroupName="sizete" Text="MB"/> <asp:RadioButton ID="sizeteGB" runat="server" Checked="true" GroupName="sizete" Text="GB"/> if (sizeteMB.Checked) { command.Parameters["@sizeUnitT"].Value = "MB"; } else { command.Parameters["@sizeUnitT"].Value = "GB"; }