How I insert record in oracle using ODP.NET through Asp.net c#

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C#

ASP.NET

Oracle

I am inserting record in Oracle table using ODP.NET Oracle.DataAccess.Client throug Asp.net c#.
The oracle table is tblGroup and GROUPNAME varchar2,GROUPDETAILS varchar2 is column name
but data is not inserting.I am using following code

public void insertRecord(string StudentgroupName, string groupDetails) 
{
    using (OracleConnection con = GetConnection())
    {
        OracleCommand cmd = new OracleCommand();
        cmd.Connection = con; //assigning connection to command
        cmd.CommandType = CommandType.Text; //representing type of command
        cmd.CommandText = "INSERT INTO tblGroup (GROUPNAME,GROUPDETAILS) values(@GROUPNAME,@GROUPDETAILS)";

        //adding parameters with value
        cmd.Parameters.Add("@GROUPNAME", StudentgroupName);
        cmd.Parameters.Add("@GROUPDETAILS", groupDetails);
        
        con.Open(); //opening connection
        cmd.ExecuteNonQuery();             
    }
}

and got following error

Quote:

Oracle.DataAccess.Client.OracleException ORA-00936: missing expression at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck) at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, Boolean bCheck) at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery() at SchoolsManagementSystem.DAL.insertRecord(String StudentgroupName, String groupDetails) in d:\c#\SchoolsManagementSystem\SchoolsManagementSystem\App_Code\DAL.cs:line 85 at SchoolsManagementSystem.Group.btnSubmit_Click(Object sender, EventArgs e) in d:\c#\SchoolsManagementSystem\SchoolsManagementSystem\Group.aspx.cs:line 26

Guide me How can I solve my problem