в 15:31, 26 мая 2010

2010-05-26T15:31:19Z

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2010-05-26T11:42:34Z

1 версия

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==Create table through SqlConnection==

<source lang="csharp">
using System;
using System.Data;
using System.Data.SqlClient;
class CommandExampleCreateDb
{
static void Main()
{
SqlConnection thisConnection = new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI");
SqlCommand nonqueryCommand = thisConnection.CreateCommand();
try
{
thisConnection.Open();
nonqueryCommand.rumandText = "CREATE DATABASE MyDb";
Console.WriteLine(nonqueryCommand.rumandText);
nonqueryCommand.ExecuteNonQuery();
Console.WriteLine("Database created, now switching");
thisConnection.ChangeDatabase("MyDb");
nonqueryCommand.rumandText = "CREATE TABLE MynfexTable (COL1 integer)";
Console.WriteLine(nonqueryCommand.rumandText);
Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());
nonqueryCommand.rumandText = "INSERT INTO MynfexTable VALUES (99)";
Console.WriteLine(nonqueryCommand.rumandText);
Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());

} catch (SqlException ex) {

Console.WriteLine(ex.ToString());

} finally {

thisConnection.Close();
Console.WriteLine("Connection Closed.");

}
}
}

</source>

==Use ExecuteNonQuery() to run DDL statements: create table==

<source lang="csharp">
using System;
using System.Data;
using System.Data.SqlClient;
class ExecuteDDL {
public static void Main() {
SqlConnection mySqlConnection = new SqlConnection("server=localhost;database=Northwind;uid=sa;pwd=sa");
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.rumandText =
"CREATE TABLE MyPersons (" +
" PersonID int CONSTRAINT PK_Persons PRIMARY KEY," +
" FirstName nvarchar(15) NOT NULL," +
" LastName nvarchar(15) NOT NULL," +
" DateOfBirth datetime" +
")";
mySqlConnection.Open();
Console.WriteLine("Creating MyPersons table");
int result = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
mySqlCommand.rumandText =
"ALTER TABLE MyPersons " +
"ADD EmployerID nchar(5) CONSTRAINT FK_Persons_Customers " +
"REFERENCES Customers(CustomerID)";
result = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
mySqlCommand.rumandText = "DROP TABLE MyPersons";
result = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
mySqlConnection.Close();
}
}
</source>

==use the ExecuteNonQuery() method to run DDL statements==

<source lang="csharp">
using System;
using System.Data;
using System.Data.SqlClient;
class ExecuteDDL
{
public static void Main()
{
SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.rumandText =
"CREATE TABLE MyEmployee (" +
" ID int CONSTRAINT PK_Persons PRIMARY KEY," +
" FirstName nvarchar(15) NOT NULL," +
" LastName nvarchar(15) NOT NULL," +
" DateOfBirth datetime" +
")";
mySqlConnection.Open();
Console.WriteLine("Creating MyEmployee table");
int result = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
mySqlCommand.rumandText =
"ALTER TABLE MyEmployee " +
"ADD EmployerID nchar(5) CONSTRAINT FK_Persons_Customers " +
"REFERENCES Employee(ID)";
Console.WriteLine("Altering MyEmployee table");
result = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
mySqlCommand.rumandText = "DROP TABLE MyEmployee";
Console.WriteLine("Dropping MyEmployee table");
result = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
mySqlConnection.Close();
}
}

</source>

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в 15:31, 26 мая 2010

Admin: 1 версия