в 15:31, 26 мая 2010

2010-05-26T15:31:19Z

Admin: 1 версия

2010-05-26T11:42:25Z

1 версия

Новая страница

==Deleting Data==

<source lang="csharp">

using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Text;
class Program {
static void Main(string[] args) {
SqlConnection thisConnection = new SqlConnection(
@"Server=(local)\sqlexpress;Integrated Security=True;" +
"Database=northwind");
SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT CustomerID, CompanyName FROM Customers", thisConnection);
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);
DataSet thisDataSet = new DataSet();
thisAdapter.Fill(thisDataSet, "Customers");
Console.WriteLine("# rows before change: {0}",thisDataSet.Tables["Customers"].Rows.Count);
DataColumn[] keys = new DataColumn[1];
keys[0] = thisDataSet.Tables["Customers"].Columns["CustomerID"];
thisDataSet.Tables["Customers"].PrimaryKey = keys;
DataRow findRow = thisDataSet.Tables["Customers"].Rows.Find("ZACZI");
if (findRow != null) {
findRow.Delete();
thisAdapter.Update(thisDataSet, "Customers");
}
Console.WriteLine("# rows after change: {0}",
thisDataSet.Tables["Customers"].Rows.Count);
thisConnection.Close();
}
}

</source>

==Deleting Data Using SqlCommandBuilder==

<source lang="csharp">
/*
* C# Programmers Pocket Consultant
* Author: Gregory S. MacBeth
* Email: gmacbeth@comporium.net
* Create Date: June 27, 2003
* Last Modified Date:
* Version: 1
*/
using System;
using System.Data;
using System.Data.SqlClient;
namespace Client.Chapter_13___ADO.NET
{
public class DeletingDataUsingCommandBuilder
{
static void Main(string[] args)
{
SqlConnection MyConnection = new SqlConnection(@"Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");
SqlDataAdapter MyDataAdapter = new SqlDataAdapter("SELECT * FROM Test", MyConnection);
SqlCommandBuilder MyCmd = new SqlCommandBuilder(MyDataAdapter);
DataSet MyDataSet = new DataSet();
MyDataAdapter.Fill(MyDataSet);
DataColumn[] MyKey = new DataColumn[1];
MyKey[0] = MyDataSet.Tables[0].Columns[0];
MyDataSet.Tables[0].PrimaryKey = MyKey;
DataRow FindMyRow = MyDataSet.Tables[0].Rows.Find(1);
FindMyRow.Delete();
MyDataAdapter.Update(MyDataSet);
}
}
}

</source>

==Deleting Data Using SQLStatements==

<source lang="csharp">
/*
* C# Programmers Pocket Consultant
* Author: Gregory S. MacBeth
* Email: gmacbeth@comporium.net
* Create Date: June 27, 2003
* Last Modified Date:
* Version: 1
*/
using System;
using System.Data;
using System.Data.SqlClient;
namespace Client.Chapter_13___ADO.NET
{
public class DeletingDataUsingSQLStatements
{
static void Main(string[] args)
{
SqlConnection MyConnection = new SqlConnection(@"Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");
MyConnection.Open();
String MyString = "DELETE Test";
SqlCommand MyCmd = new SqlCommand(MyString, MyConnection);
MyCmd.ExecuteScalar();
MyConnection.Close();
}
}
}

</source>

← Предыдущая	Версия 15:31, 26 мая 2010
(нет различий)

Csharp/C Sharp/Database ADO.net/Delete - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия