Csharp/C Sharp/Database ADO.net/SqlException

Catch Sql command exceptions

using System;
using System.Data;
using System.Data.SqlClient;
   class SqlExceptionDemo {
      static void Main(){
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         SqlConnection conn = new SqlConnection(connString);
         SqlCommand cmd = conn.CreateCommand();
      
         cmd.rumandType = CommandType.StoredProcedure; 
         cmd.rumandText = "something wrong here";
         try {
            conn.Open();
 
            SqlDataReader dr = cmd.ExecuteReader();
            string str = dr.GetValue(20).ToString();
            dr.Close();
         }
         catch (System.InvalidOperationException ex)
         {
            string str;
            str = "Source:" + ex.Source;
            str += "\n" + "Message:"+ ex.Message;
            str += "\n" + "\n";
            str += "\n" + "Stack Trace :" + ex.StackTrace;
            Console.WriteLine (str, "Specific Exception");
         }
         catch (System.Data.SqlClient.SqlException ex)
         {
            string str;
            str = "Source:" + ex.Source;
            str += "\n" + "Message:" + ex.Message;
            Console.WriteLine (str, "Database Exception");
         }
         catch (System.Exception ex)
         {
            string str;
            str = "Source:" + ex.Source;
            str += "\n"+ "Message:" + ex.Message;
            Console.WriteLine (str, "Generic Exception");
         }
         finally
         {
            if ( conn.State == ConnectionState.Open)
            {
               Console.WriteLine ("Finally block closing the connection", "Finally");
               conn.Close();
            }
         }
      }
   }

Deal with multiple Sql error in SqlException

using System;
using System.Data;
using System.Data.SqlClient;
   class SqlExceptionDemo {
      static void Main(){
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         SqlConnection conn = new SqlConnection(connString);
         SqlCommand cmd = conn.CreateCommand();
         cmd.rumandType = CommandType.StoredProcedure;
         cmd.rumandText = "wrong";
         try
         {
            conn.Open();
            cmd.ExecuteNonQuery();
         }  
         catch (System.Data.SqlClient.SqlException ex)
         {
            string str ="";
            for (int i = 0; i < ex.Errors.Count; i++)
            {
               str += "\n" + "Index #" + i + "\n" +
                  "Exception : " + ex.Errors[i].ToString() + "\n" +
                  "Number:" + ex.Errors[i].Number.ToString() + "\n"
                  ;
            }
        
            Console.WriteLine(str);
         }
         catch (System.Exception ex)
         {
            string str;
            str = "Source:"+ ex.Source;
            str += "\n"+ "Error Message:"+ ex.Message;
            Console.WriteLine (str);
         }
         finally
         {
            if (conn.State == ConnectionState.Open)
            {
               Console.WriteLine ("Finally block closing the connection", "Finally");
               conn.Close();
            }
         }  
      }
   }

SqlException detail info: line number, procedure, server

using System;
using System.Data;
using System.Data.SqlClient;
   class SqlExceptionDemo {
      static void Main(){
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         SqlConnection conn = new SqlConnection(connString);
         SqlCommand cmd = conn.CreateCommand();
         cmd.rumandType = CommandType.StoredProcedure;
         cmd.rumandText = "wrong command";
         try {
            conn.Open();
            cmd.ExecuteNonQuery();
         }  
         catch (System.Data.SqlClient.SqlException ex)
         {
            string str;
            str = "Source:"+ ex.Source;        
            str += "\n"+ "Number:"+ ex.Number.ToString();
            str += "\n"+ "Message:"+ ex.Message;
            str += "\n"+ "Class:"+ ex.Class.ToString ();
            str += "\n"+ "Procedure:"+ ex.Procedure.ToString();
            str += "\n"+ "Line Number:"+ex.LineNumber.ToString();
            str += "\n"+ "Server:"+ ex.Server.ToString();
        
            Console.WriteLine (str, "Database Exception");
         }
         catch (System.Exception ex)
         {
            string str;
            str = "Source:"+ ex.Source;
            str += "\n"+ "Error Message:"+ ex.Message;
            Console.WriteLine (str, "General Exception");
         }
         finally
         {
            if (conn.State == ConnectionState.Open)
            {
               Console.WriteLine ("Finally block closing the connection", "Finally");
               conn.Close();
            }        
         } 
      }
   }

SqlException message

using System;
using System.Data;
using System.Data.SqlClient;
   class SqlExceptionDemo {
      static void Main(){
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         SqlConnection conn = new SqlConnection(connString);
         SqlCommand cmd = conn.CreateCommand(); 
  
         cmd.rumandType = CommandType.StoredProcedure;
  
         cmd.rumandText = "wrong sql";
         try{  
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();    
            dr.Close();      
         } catch (System.Data.SqlClient.SqlException ex) {
            string str;
            str = "Source:" + ex.Source;
            str += "\n" + "Exception Message:" + ex.Message;
            Console.WriteLine(str);
         }
         catch (System.Exception ex) 
         {
            string str;
            str = "Source:" + ex.Source;
            str += "\n" + "Exception Message:" + ex.Message;
            Console.WriteLine(str);
         }
         finally
         {
            if (conn.State == ConnectionState.Open)
            {
               Console.WriteLine("Finally block closing the connection", "Finally");
               conn.Close();
            }   
         } 
      }
   }