C# with MySQL INSERT parameters

C# with MySQL INSERT parameters

To insert data into a MySQL database using parameters in C#, you can use the MySqlCommand class from the MySql.Data.MySqlClient namespace. Here's an example code snippet that inserts a new row into a MySQL database using parameters:

using MySql.Data.MySqlClient; string connectionString = "Server=localhost;Database=mydatabase;Uid=myusername;Pwd=mypassword;"; string query = "INSERT INTO mytable (column1, column2, column3) VALUES (@param1, @param2, @param3)"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); using (MySqlCommand command = new MySqlCommand(query, connection)) { // Add parameters to the command command.Parameters.AddWithValue("@param1", "value1"); command.Parameters.AddWithValue("@param2", 42); command.Parameters.AddWithValue("@param3", true); // Execute the command int rowsAffected = command.ExecuteNonQuery(); Console.WriteLine($"Rows affected: {rowsAffected}"); } }

In this example, we first define a connectionString that specifies the server, database, username, and password to use for the connection. We also define a query that contains the SQL statement to execute, with parameter placeholders (@param1, @param2, and @param3) instead of literal values.

We then create a MySqlConnection object and open the connection using the Open() method.

Next, we create a MySqlCommand object and pass the query and connection objects to its constructor. We then add parameters to the command using the Parameters property and the AddWithValue() method, which takes a parameter name and a value. We use this method to add three parameters with different data types.

Finally, we execute the command using the ExecuteNonQuery() method, which returns the number of rows affected by the command.

Note that when using parameters, you should avoid building SQL statements dynamically using string concatenation, as this can make your application vulnerable to SQL injection attacks. Instead, always use parameterized queries to ensure that user input is properly sanitized.

Examples

  1. "C# MySQL INSERT using parameters"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, Column2) VALUES (@Value1, @Value2)"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@Value2", 123); // Execute the query cmd.ExecuteNonQuery(); } } } }
    • Description: Demonstrates a basic C# program for inserting data into a MySQL database using parameters to prevent SQL injection.

  2. "C# MySQL INSERT with datetime parameter"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (ColumnName, DateTimeColumn) VALUES (@Value1, @DateTimeValue)"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue"); cmd.Parameters.AddWithValue("@DateTimeValue", DateTime.Now); // Execute the query cmd.ExecuteNonQuery(); } } } }
    • Description: Shows how to insert data into a MySQL table with a datetime column using C# and parameters.

  3. "C# MySQL INSERT with multiple parameters"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, Column2, Column3) VALUES (@Value1, @Value2, @Value3)"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@Value2", 123); cmd.Parameters.AddWithValue("@Value3", true); // Execute the query cmd.ExecuteNonQuery(); } } } }
    • Description: Illustrates how to perform a MySQL INSERT with multiple parameters using C#.

  4. "C# MySQL INSERT with null parameter"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, NullableColumn) VALUES (@Value1, @NullableValue)"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@NullableValue", DBNull.Value); // Execute the query cmd.ExecuteNonQuery(); } } } }
    • Description: Demonstrates how to handle null values in MySQL INSERT using C# by using DBNull.Value for nullable columns.

  5. "C# MySQL INSERT with parameterized query string"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, Column2) VALUES (@Value1, @Value2)"; using (MySqlCommand cmd = new MySqlCommand()) { // Set the connection and query cmd.Connection = connection; cmd.CommandText = insertQuery; // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@Value2", 123); // Execute the query cmd.ExecuteNonQuery(); } } } }
    • Description: Utilizes a parameterized query string for MySQL INSERT in C#, enhancing code readability and security.

  6. "C# MySQL INSERT with GUID parameter"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, GuidColumn) VALUES (@Value1, @GuidValue)"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@GuidValue", Guid.NewGuid()); // Execute the query cmd.ExecuteNonQuery(); } } } }
    • Description: Demonstrates how to insert a GUID parameter into a MySQL table using C#.

  7. "C# MySQL INSERT with parameterized stored procedure"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); using (MySqlCommand cmd = new MySqlCommand("YourStoredProcedure", connection)) { cmd.CommandType = System.Data.CommandType.StoredProcedure; // Add parameters cmd.Parameters.AddWithValue("@Parameter1", "ExampleValue1"); cmd.Parameters.AddWithValue("@Parameter2", 123); // Execute the stored procedure cmd.ExecuteNonQuery(); } } } }
    • Description: Shows how to perform a MySQL INSERT using a parameterized stored procedure in C#.

  8. "C# MySQL INSERT with transaction and parameters"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); using (MySqlTransaction transaction = connection.BeginTransaction()) { try { string insertQuery = "INSERT INTO YourTable (Column1, Column2) VALUES (@Value1, @Value2)"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection, transaction)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@Value2", 123); // Execute the query cmd.ExecuteNonQuery(); } // Commit the transaction transaction.Commit(); } catch (Exception ex) { // Handle the exception Console.WriteLine(ex.Message); // Rollback the transaction on failure transaction.Rollback(); } } } } }
    • Description: Demonstrates a MySQL INSERT operation within a transaction in C# with parameterized queries and error handling.

  9. "C# MySQL INSERT and retrieve last inserted ID"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, Column2) VALUES (@Value1, @Value2); SELECT LAST_INSERT_ID();"; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { // Add parameters cmd.Parameters.AddWithValue("@Value1", "ExampleValue1"); cmd.Parameters.AddWithValue("@Value2", 123); // Execute the query and retrieve the last inserted ID int lastInsertedId = Convert.ToInt32(cmd.ExecuteScalar()); Console.WriteLine($"Last Inserted ID: {lastInsertedId}"); } } } }
    • Description: Shows how to perform a MySQL INSERT operation in C# and retrieve the last inserted ID using LAST_INSERT_ID().

  10. "C# MySQL INSERT with bulk data using parameters"

    • Code Implementation:
      using MySql.Data.MySqlClient; using System; using System.Collections.Generic; class Program { static void Main() { string connectionString = "Server=localhost;Database=YourDatabase;User ID=YourUser;Password=YourPassword;"; using (MySqlConnection connection = new MySqlConnection(connectionString)) { connection.Open(); string insertQuery = "INSERT INTO YourTable (Column1, Column2) VALUES (@Value1, @Value2)"; // Simulate bulk data List<Tuple<string, int>> bulkData = new List<Tuple<string, int>> { new Tuple<string, int>("ExampleValue1", 123), new Tuple<string, int>("ExampleValue2", 456), // Add more data as needed }; using (MySqlCommand cmd = new MySqlCommand(insertQuery, connection)) { foreach (var data in bulkData) { // Add parameters for each set of data cmd.Parameters.Clear(); // Clear previous parameters cmd.Parameters.AddWithValue("@Value1", data.Item1); cmd.Parameters.AddWithValue("@Value2", data.Item2); // Execute the query for each set of data cmd.ExecuteNonQuery(); } } } } }
    • Description: Demonstrates how to perform a bulk INSERT operation in C# with MySQL using parameters for each set of data.

More Tags

callback jenkins-groovy parent angular-route-segment lxml dylib kotlin xlwings activation yii-extensions

More C# Questions

More Dog Calculators

More Organic chemistry Calculators

More Fitness-Health Calculators

More Animal pregnancy Calculators