SqlDataAdapter上调用存储过程

大多数的时候，我们对数据库的更新，读取等都是通过存储过程来操作的。存储过程更加快速和容易调整。这样就要求熟悉如何在SqlDataAdapter上调用存储过程，当然也可以不通过SqlDataAdapter来调用，直接调用在前面里面已经说过了。

下面是关于SqlDataAdapter如何更新数据的一个示例：

里面关于配置文件可以参考前面的文章

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Configuration;

using System.Data;

using System.Data.SqlClient;



namespace DataDemo

{

    class Program

    {

        private static string GetConnectionStringsConfig(string connectionName)

        {

            string connectionString = ConfigurationManager.ConnectionStrings[connectionName].ConnectionString.ToString();

            Console.WriteLine(connectionString);

            return connectionString;

        }



        public static void ManufactureProductDataTable(DataSet ds)

        {

            DataTable products = new DataTable("Products");

            products.Columns.Add(new DataColumn("ProductID", typeof(int)));

            products.Columns.Add(new DataColumn("ProductName", typeof(string)));

            products.Columns.Add(new DataColumn("SupplierID", typeof(int)));

            products.Columns.Add(new DataColumn("CategoryID", typeof(int)));

            products.Columns.Add(new DataColumn("QuantityPerUnit", typeof(string)));

            products.Columns.Add(new DataColumn("UnitPrice", typeof(decimal)));

            products.Columns.Add(new DataColumn("UnitsInStock", typeof(short)));

            products.Columns.Add(new DataColumn("UnitsOnOrder", typeof(short)));

            products.Columns.Add(new DataColumn("RecordLevel", typeof(short)));

            products.Columns.Add(new DataColumn("Discontinued", typeof(bool)));

            ds.Tables.Add(products);

        }



        private static SqlCommand GenerateSelectCommand(SqlConnection conn)

        {

            SqlCommand cmd = new SqlCommand("RegionSelect", conn);

            cmd.CommandType = CommandType.StoredProcedure;

            cmd.UpdatedRowSource = UpdateRowSource.None;

            return cmd;

        }



        private static SqlCommand GenerateInsertCommand(SqlConnection conn)

        {

            SqlCommand cmd = new SqlCommand("RegionInsert", conn);

            cmd.CommandType = CommandType.StoredProcedure;

            SqlParameter para1 = new SqlParameter("@RegionDescription", SqlDbType.NChar);

            para1.Value = "North West";

            cmd.Parameters.Add(para1);

            SqlParameter para2 = new SqlParameter("@RegionID", SqlDbType.Int);

            para2.Direction = ParameterDirection.Output;

            cmd.Parameters.Add(para2);

            cmd.UpdatedRowSource = UpdateRowSource.OutputParameters;

            return cmd;

        }



        static void Main(string[] args)

        {

            string source = GetConnectionStringsConfig("Northwind");



            string select = "SELECT * FROM Products";



            SqlConnection conn = new SqlConnection(source);

            conn.Open();



            // Use customized table

            SqlDataAdapter cmd = new SqlDataAdapter(select, conn);

            DataSet ds = new DataSet();

            ManufactureProductDataTable(ds);

            cmd.Fill(ds, "Products");

            foreach (DataRow row in ds.Tables["Products"].Rows)

                Console.WriteLine("'{0}' from {1}", row[0], row[1]);



            // Use stored procedure on adapter

            DataSet ds2 = new DataSet();

            SqlDataAdapter da2 = new SqlDataAdapter();

            da2.SelectCommand = GenerateSelectCommand(conn);

            da2.Fill(ds2, "Region");

            foreach (DataRow row in ds2.Tables["Region"].Rows)

                Console.WriteLine("'{0}' is {1}", row[0], row[1]);



            // Use dataset to read XML file

            DataSet ds3 = new DataSet();

            ds3.ReadXml(".\\MyData.xml");

            foreach (DataRow row in ds3.Tables[0].Rows)

                Console.WriteLine("'{0}' comes {1}", row[0], row[1]);



            // Insert a row to region table

            DataSet ds4 = new DataSet();

            SqlDataAdapter da3 = new SqlDataAdapter();

            

            da3.InsertCommand = GenerateInsertCommand(conn);

            da3.InsertCommand.ExecuteNonQuery();



            da3.SelectCommand = GenerateSelectCommand(conn);



            da3.Fill(ds4, "Region");



            foreach (DataRow row in ds4.Tables["Region"].Rows)

                Console.WriteLine("'{0}' is {1}", row[0], row[1]);



            // Close SQL connection

            conn.Close();

            Console.ReadKey();

        }

    }

}

 

InsertCommand调用的时候不要忘记这句话：

da3.InsertCommand.ExecuteNonQuery();

不然是不执行的，但是selectCommand却是可以不用这句话的。

在调用

da3.InsertCommand.ExecuteNonQuery()

之前，要确保conn是open的，也就是这句话要有

conn.Open();

开始没注意，害的我找了半天不知道错哪儿了o(╯□╰)o

 

下面这个是来自MSDN上SqlDataAdapter的一个示例，展示各种command

public static SqlDataAdapter CreateCustomerAdapter(

    SqlConnection connection)

{

    SqlDataAdapter adapter = new SqlDataAdapter();



    // Create the SelectCommand.

    SqlCommand command = new SqlCommand("SELECT * FROM Customers " +

        "WHERE Country = @Country AND City = @City", connection);



    // Add the parameters for the SelectCommand.

    command.Parameters.Add("@Country", SqlDbType.NVarChar, 15);

    command.Parameters.Add("@City", SqlDbType.NVarChar, 15);



    adapter.SelectCommand = command;



    // Create the InsertCommand.

    command = new SqlCommand(

        "INSERT INTO Customers (CustomerID, CompanyName) " +

        "VALUES (@CustomerID, @CompanyName)", connection);



    // Add the parameters for the InsertCommand.

    command.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");

    command.Parameters.Add("@CompanyName", SqlDbType.NVarChar, 40, "CompanyName");



    adapter.InsertCommand = command;



    // Create the UpdateCommand.

    command = new SqlCommand(

        "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +

        "WHERE CustomerID = @oldCustomerID", connection);



    // Add the parameters for the UpdateCommand.

    command.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");

    command.Parameters.Add("@CompanyName", SqlDbType.NVarChar, 40, "CompanyName");

    SqlParameter parameter = command.Parameters.Add(

        "@oldCustomerID", SqlDbType.NChar, 5, "CustomerID");

    parameter.SourceVersion = DataRowVersion.Original;



    adapter.UpdateCommand = command;



    // Create the DeleteCommand.

    command = new SqlCommand(

        "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection);



    // Add the parameters for the DeleteCommand.

    parameter = command.Parameters.Add(

        "@CustomerID", SqlDbType.NChar, 5, "CustomerID");

    parameter.SourceVersion = DataRowVersion.Original;



    adapter.DeleteCommand = command;



    return adapter;

}