Delete data from database using SqlCommand : SqlCommand « Database ADO.net « C# / C Sharp

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C# / C Sharp » Database ADO.net » SqlCommandScreenshots 
Delete data from database using SqlCommand

using System;
using System.Data;
using System.Data.SqlClient;

   class CommandExampleNonQuery
   {
      static void Main() 
      {
         SqlConnection thisConnection = new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI");
         
         SqlCommand selectCommand = new SqlCommand("SELECT COUNT(*) FROM Employee", thisConnection);
         
         SqlCommand nonqueryCommand = thisConnection.CreateCommand();

         try {
            thisConnection.Open();

            Console.WriteLine("Before INSERT: Number of Employee is: {0}", selectCommand.ExecuteScalar());
            nonqueryCommand.CommandText = "INSERT INTO Employee (Firstname, Lastname) VALUES ('Z', 'Z')";
            Console.WriteLine(nonqueryCommand.CommandText);
            Console.WriteLine("Number of Rows Affected is: {0}",nonqueryCommand.ExecuteNonQuery());
            Console.WriteLine("After INSERT: Number of Employee is: {0}", selectCommand.ExecuteScalar());
            nonqueryCommand.CommandText = "DELETE FROM Employee WHERE Firstname='Z' AND Lastname='Z'";
            Console.WriteLine(nonqueryCommand.CommandText);
            Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());
            Console.WriteLine("After DELETE: Number of Employee is: {0}", selectCommand.ExecuteScalar());
         
         catch (SqlException ex
         {
            Console.WriteLine(ex.ToString());
         }
         finally 
         {  
            thisConnection.Close();
            Console.WriteLine("Connection Closed.");
         }
      }
   }



           
       
Related examples in the same category
1.Use the GetOrdinal() method of a DataReader object to get the numeric positions of a column
2.How to use the ExecuteScalar() method to run a SELECT statement that returns a single value
3.Use the ExecuteNonQuery() method to run INSERT, UPDATE, and DELETE statements
4.Use SqlCommand to call SQL and insert data to database table
5.Get row count from SqlCommand
6.Pass parameters to SqlCommand
7.Get row count by 'ExecuteScalar'
8.Execute multiple SQL statements(insert) using a SqlCommand objectExecute multiple SQL statements(insert) using a SqlCommand object
9.execute multiple SELECT statements(select) using a SqlCommand object and read the results using a SqlDataReader object
10.Async Command Object
11.Populate a DataSet object using a SELECT statement
12.Use ExecuteXmlReader() to run a SELECT statement that returns XML
13.control SqlCommand to return a single row
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