[ArgumentException: Object of type 'System.DBNull' cannot be converted to type 'System.String'.]
System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast) +5951730
System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, CultureInfo culture, Signature sig) +197
System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +203
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +96
System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index) +35
mySqlHelper.Cdb.getDataObjectInstance(String sql, Object obj, Object[] list) +1231
BLL.QABL.getQAitem(Int32 id) +232
details.Page_Load(Object sender, EventArgs e) in d:\WEB\HTTPS\ct360_answer\details.aspx.cs:36
System.Web.UI.Control.OnLoad(EventArgs e) +106
System.Web.UI.Control.LoadRecursive() +68
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785
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