Directly Executing SQL Queries in C#
When pursuing a new development task, it's crucial to adapt existing solutions to constraints. In the case where running a batch file is no longer feasible, we turn to C# for an alternative. Our goal is to replicate the functionality of executing an SQL query directly from within our C# application.
Using the SqlCommand class, we can execute SQL statements from within our code. Consider the following sample code:
string queryString = "SELECT tPatCulIntPatIDPk, tPatSFirstname, tPatSName, tPatDBirthday FROM [dbo].[TPatientRaw] WHERE tPatSName = @tPatSName"; string connectionString = "Server=.\PDATA_SQLEXPRESS;Database=;User Id=sa;Password=2BeChanged!;"; using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = new SqlCommand(queryString, connection); command.Parameters.AddWithValue("@tPatSName", "Your-Parm-Value"); connection.Open(); SqlDataReader reader = command.ExecuteReader(); try { while (reader.Read()) { Console.WriteLine(String.Format("{0}, {1}", reader["tPatCulIntPatIDPk"], reader["tPatSFirstname"]));// etc } } finally { // Always call Close when done reading. reader.Close(); } }
By embracing this approach, we gain the power to execute SQL queries directly in our C# code, effectively mimicking the functionality of executable batch files while leveraging the flexibility, control, and performance benefits of C#.
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