в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:19:05Z

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==Fill a DataSet using DataAdapter and output to console==

<source lang="csharp">using System;
using System.Data;
using System.Data.SqlClient;
class Program
{
static void Main(string[] args)
{
string sqlConnectString = "Data Source=(local);Integrated security=SSPI;Initial Catalog=AdventureWorks;";
string sqlSelect = "SELECT FirstName, LastName FROM Person.Contact";
SqlDataAdapter da = new SqlDataAdapter(sqlSelect, sqlConnectString);
DataTable dt = new DataTable( );
da.Fill(dt);
foreach (DataRow row in dt.Rows)
Console.WriteLine("{0} {1}", row[0], row["LastName"]);

DataSet ds = new DataSet( );
da.Fill(ds, "Contact");
Console.WriteLine(ds.Tables.Count);
Console.WriteLine(ds.Tables[0].TableName);
foreach (DataRow row in ds.Tables["Contact"].Rows)
Console.WriteLine("{0} {1}", row[0], row[1]);
}
}</source>

==Fill a DataTable using DataAdapter==

<source lang="csharp">using System;
using System.Data;
using System.Data.SqlClient;
class Program
{
static void Main(string[] args)
{
string sqlConnectString = "Data Source=(local);Integrated security=SSPI;Initial Catalog=AdventureWorks;";
string sqlSelect = "SELECT ContactID, FirstName, LastName FROM Person.Contact";
SqlDataAdapter da = new SqlDataAdapter(sqlSelect, sqlConnectString);

DataTable dt1 = new DataTable();
da.Fill(dt1);
foreach (DataRow row in dt1.Rows)
{
Console.WriteLine(
"ContactID = {0}\tFirstName = {1}\tLastName = {2}",
row["ContactID"], row["FirstName"], row["LastName"]);
}
}
}</source>

==Multiple DataAdapter==

<source lang="csharp">using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
public class MainClass : System.Windows.Forms.Form
{
private System.Windows.Forms.DataGrid dataGrid1;
private System.Windows.Forms.DataGrid dataGrid2;
public MainClass()
{
InitializeComponent();
string ConnectionString ="Integrated Security=SSPI;Initial Catalog=Northwind;Data Source=localhost;";
SqlConnection conn = new SqlConnection(ConnectionString);
conn.Open();
DataSet ds = new DataSet("CustomersOrders");
SqlDataAdapter adapter1 = new SqlDataAdapter("SELECT * FROM Orders", conn);
SqlDataAdapter adapter2 = new SqlDataAdapter("SELECT * FROM Customers", conn);
adapter1.Fill(ds, "Orders");
adapter2.Fill(ds, "Customers");
DataViewManager dvm = new DataViewManager(ds);
dvm.DataViewSettings["Orders"].RowFilter = "EmployeeID = 4";
dvm.DataViewSettings["Orders"].Sort = "ShippedDate ASC";
dvm.DataViewSettings["Customers"].RowFilter = "ContactName Like "C%"";
dvm.DataViewSettings["Customers"].Sort = "ContactName ASC";
DataView dataView1 = dvm.CreateDataView(ds.Tables["Orders"]);
DataView dataView2 = dvm.CreateDataView(ds.Tables["Customers"]);
dataGrid1.DataSource = dataView1;
dataGrid2.DataSource = dataView2;
}
private void InitializeComponent()
{
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.dataGrid2 = new System.Windows.Forms.DataGrid();
((System.ruponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
((System.ruponentModel.ISupportInitialize)(this.dataGrid2)).BeginInit();
this.SuspendLayout();
//
this.dataGrid1.DataMember = "";
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 8);
this.dataGrid1.Size = new System.Drawing.Size(256, 264);
//
this.dataGrid2.DataMember = "";
this.dataGrid2.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid2.Location = new System.Drawing.Point(272, 8);
this.dataGrid2.Size = new System.Drawing.Size(256, 264);
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(536, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.dataGrid2,
this.dataGrid1});
((System.ruponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
((System.ruponentModel.ISupportInitialize)(this.dataGrid2)).EndInit();
this.ResumeLayout(false);
}
[STAThread]
static void Main()
{
Application.Run(new MainClass());
}
}</source>

==Update through SqlDataAdapter==

<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("name before change: {0}",thisDataSet.Tables["Customers"].Rows[9]["CompanyName"]);
thisDataSet.Tables["Customers"].Rows[9]["CompanyName"] = "Acme, Inc.";
thisAdapter.Update(thisDataSet, "Customers");
Console.WriteLine("name after change: {0}", thisDataSet.Tables["Customers"].Rows[9]["CompanyName"]);
thisConnection.Close();
}
}</source>

==Use a DataAdapter to fill a DataTable==

<source lang="csharp">using System;
using System.Data;
using System.Data.SqlClient;
class Program
{
static void Main(string[] args)
{
string sqlConnectString = "Data Source=(local);Integrated security=SSPI;Initial Catalog=AdventureWorks;";
string sqlSelect = "SELECT TOP 5 * FROM Sales.SalesOrderDetail";
SqlDataAdapter da = new SqlDataAdapter(sqlSelect, sqlConnectString);
DataTable dt = new DataTable();
da.Fill(dt);

dt.Columns.Add(new DataColumn("ExtendedPrice", typeof(Decimal),
"UnitPrice * (1 - UnitPriceDiscount) * OrderQty"));
foreach (DataRow row in dt.Rows)
Console.WriteLine("ID = {0}, UnitPrice = {1}, " +
"Disc = {2}, Qty = {3}, Total = {4}",
row["SalesOrderDetailID"], row["UnitPrice"],
row["UnitPriceDiscount"], row["OrderQty"],
row["ExtendedPrice"]);
}
}</source>

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Csharp/CSharp Tutorial/ADO.Net/DataAdapter - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия