如何从c#执行T-SQL？

Question

任何人都可以举例说明使用C#执行T-SQL语句吗？

Answer 1

你的意思是这样的:

private static void ReadOrderData(string connectionString)
{
      string commandText = "SELECT OrderID, CustomerID FROM dbo.Orders;";
      using (SqlConnection connection = new SqlConnection(connectionString))
      {
            using (SqlCommand command = new SqlCommand(commandText, connection))
            {
                  connection.Open();
                  using (SqlDataReader reader = command.ExecuteReader())
                  {
                        while (reader.Read())
                        {
                              Console.WriteLine(String.Format("{0}, {1}", 
                                reader[0], reader[1]));
                        }
                  }
            }
      }
}

或者,也许是这样的:

static public int AddProductCategory(string newName, string connString)
{
    Int32 newProdID = 0;
    string sql =
        "INSERT INTO Production.ProductCategory (Name) VALUES (@Name); "
        + "SELECT CAST(scope_identity() AS int)";
    using (SqlConnection conn = new SqlConnection(connString))
    {
        SqlCommand cmd = new SqlCommand(sql, conn);
        cmd.Parameters.Add("@Name", SqlDbType.VarChar);
        cmd.Parameters["@Name"].Value = newName;
        try
        {
            conn.Open();
            newProdID = (Int32)cmd.ExecuteScalar();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
    return (int)newProdID;
}

资料来源:MSDN

Answer 2

我建议你从像这样的ADO.NET turorial开始

http://www.csharp-station.com/Tutorials/AdoDotNet/Lesson01.aspx

如何使用SQLCommand

http://www.csharp-station.com/Tutorials/AdoDotNet/Lesson03.aspx