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Csharp/C Sharp by API/System.Data/DataRow - История изменений
2026-04-30T12:10:03Z
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в 15:31, 26 мая 2010
2010-05-26T15:31:35Z
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Admin: 1 версия
2010-05-26T12:12:20Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==DataRow.RowState==<br />
<br />
<br />
<br />
<source lang="csharp"> <br />
<br />
using System;<br />
using System.Drawing;<br />
using System.Collections;<br />
using System.ruponentModel;<br />
using System.Windows.Forms;<br />
using System.Data;<br />
using System.Data.rumon;<br />
public class DataRowUpdateState : System.Windows.Forms.Form<br />
{<br />
private System.Windows.Forms.DataGrid dataGrid1;<br />
private System.ruponentModel.Container components = null;<br />
public DataRowUpdateState()<br />
{<br />
InitializeComponent();<br />
CreateCustomersTable();<br />
}<br />
protected override void Dispose( bool disposing )<br />
{<br />
if( disposing )<br />
{<br />
if (components != null) <br />
{<br />
components.Dispose();<br />
}<br />
}<br />
base.Dispose( disposing );<br />
}<br />
private void InitializeComponent()<br />
{<br />
this.dataGrid1 = new System.Windows.Forms.DataGrid();<br />
((System.ruponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();<br />
this.SuspendLayout();<br />
// <br />
// dataGrid1<br />
// <br />
this.dataGrid1.DataMember = "";<br />
this.dataGrid1.Location = new System.Drawing.Point(8, 8);<br />
this.dataGrid1.Name = "dataGrid1";<br />
this.dataGrid1.Size = new System.Drawing.Size(416, 296);<br />
this.dataGrid1.TabIndex = 0;<br />
// <br />
// DataRowUpdateState<br />
// <br />
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);<br />
this.ClientSize = new System.Drawing.Size(432, 309);<br />
this.Controls.AddRange(new System.Windows.Forms.Control[] {<br />
this.dataGrid1});<br />
this.Name = "DataRowUpdateState";<br />
this.Text = "DataRowUpdateState";<br />
((System.ruponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();<br />
this.ResumeLayout(false);<br />
}<br />
[STAThread]<br />
static void Main() <br />
{<br />
Application.Run(new DataRowUpdateState());<br />
}<br />
private void CreateCustomersTable()<br />
{<br />
System.Data.DataTable custTable = new DataTable("Customers");<br />
DataColumn dtColumn;<br />
<br />
dtColumn = new DataColumn();<br />
dtColumn.DataType = System.Type.GetType("System.Int32");<br />
dtColumn.ColumnName = "id";<br />
dtColumn.Caption = "Cust ID";<br />
dtColumn.ReadOnly = true;<br />
dtColumn.Unique = true;<br />
custTable.Columns.Add(dtColumn);<br />
dtColumn = new DataColumn();<br />
dtColumn.DataType = System.Type.GetType("System.String");<br />
dtColumn.ColumnName = "Name";<br />
dtColumn.Caption = "Cust Name";<br />
dtColumn.AutoIncrement = false;<br />
dtColumn.ReadOnly = false;<br />
dtColumn.Unique = false;<br />
custTable.Columns.Add(dtColumn);<br />
dtColumn = new DataColumn();<br />
dtColumn.DataType = System.Type.GetType("System.String");<br />
dtColumn.ColumnName = "Address";<br />
dtColumn.Caption = "Address";<br />
dtColumn.ReadOnly = false;<br />
dtColumn.Unique = false;<br />
// Add Address column to the table.<br />
custTable.Columns.Add(dtColumn);<br />
DataColumn[] PrimaryKeyColumns = new DataColumn[1];<br />
PrimaryKeyColumns[0] = custTable.Columns["id"];<br />
custTable.PrimaryKey = PrimaryKeyColumns;<br />
DataSet ds = new DataSet("Customers");<br />
ds.Tables.Add(custTable);<br />
DataRow row1 = custTable.NewRow();<br />
row1["id"] = 1;<br />
row1["Address"] = "USA";<br />
row1["Name"] = "George";<br />
custTable.Rows.Add(row1);<br />
MessageBox.Show(row1.RowState.ToString());<br />
row1.RejectChanges();<br />
MessageBox.Show(row1.RowState.ToString());<br />
row1.Delete();<br />
MessageBox.Show(row1.RowState.ToString());<br />
<br />
dataGrid1.DataSource = ds.DefaultViewManager; <br />
}<br />
}<br />
<br />
</source></div>
Admin