Server Error in '/' Application.

Value cannot be null.
Parameter name: commandText

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: commandText

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentNullException: Value cannot be null.
Parameter name: commandText]
   AppBlock.SqlHelper.PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, String commandText, SqlParameter[] commandParameters, Boolean& mustCloseConnection) +230
   AppBlock.SqlHelper.ExecuteDataset(SqlConnection connection, CommandType commandType, String commandText, SqlParameter[] commandParameters) +231
   AppBlock.SqlHelper.ExecuteDataset(SqlConnection connection, CommandType commandType, String commandText) +64
   Sunidhi2018.Research.Research.FillData(String type, String subtype, String data, String sortfield) +7239
   Sunidhi2018.Research.Research.Page_Load(Object sender, EventArgs e) +1062
   System.Web.UI.Control.OnLoad(EventArgs e) +108
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4380.0