DataRow Update

DataRow Update

using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Data.Common; public class DataRowUpdateState : System.Windows.Forms.Form { private System.Windows.Forms.DataGrid dataGrid1; private System.ComponentModel.Container components = null; public DataRowUpdateState() { InitializeComponent(); CreateCustomersTable(); } protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } private void InitializeComponent() { this.dataGrid1 = new System.Windows.Forms.DataGrid(); ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit(); this.SuspendLayout(); // // dataGrid1 // this.dataGrid1.DataMember = ""; this.dataGrid1.Location = new System.Drawing.Point(8, 8); this.dataGrid1.Name = "dataGrid1"; this.dataGrid1.Size = new System.Drawing.Size(416, 296); this.dataGrid1.TabIndex = 0; // // DataRowUpdateState // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(432, 309); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.dataGrid1}); this.Name = "DataRowUpdateState"; this.Text = "DataRowUpdateState"; ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit(); this.ResumeLayout(false); } [STAThread] static void Main() { Application.Run(new DataRowUpdateState()); } private void CreateCustomersTable() { System.Data.DataTable custTable = new DataTable("Customers"); DataColumn dtColumn; dtColumn = new DataColumn(); dtColumn.DataType = System.Type.GetType("System.Int32"); dtColumn.ColumnName = "id"; dtColumn.Caption = "Cust ID"; dtColumn.ReadOnly = true; dtColumn.Unique = true; custTable.Columns.Add(dtColumn); dtColumn = new DataColumn(); dtColumn.DataType = System.Type.GetType("System.String"); dtColumn.ColumnName = "Name"; dtColumn.Caption = "Cust Name"; dtColumn.AutoIncrement = false; dtColumn.ReadOnly = false; dtColumn.Unique = false; custTable.Columns.Add(dtColumn); dtColumn = new DataColumn(); dtColumn.DataType = System.Type.GetType("System.String"); dtColumn.ColumnName = "Address"; dtColumn.Caption = "Address"; dtColumn.ReadOnly = false; dtColumn.Unique = false; // Add Address column to the table. custTable.Columns.Add(dtColumn); DataColumn[] PrimaryKeyColumns = new DataColumn[1]; PrimaryKeyColumns[0] = custTable.Columns["id"]; custTable.PrimaryKey = PrimaryKeyColumns; DataSet ds = new DataSet("Customers"); ds.Tables.Add(custTable); DataRow row1 = custTable.NewRow(); row1["id"] = 1; row1["Address"] = "USA"; row1["Name"] = "George"; custTable.Rows.Add(row1); MessageBox.Show(row1.RowState.ToString()); row1.RejectChanges(); MessageBox.Show(row1.RowState.ToString()); row1.Delete(); MessageBox.Show(row1.RowState.ToString()); dataGrid1.DataSource = ds.DefaultViewManager; } }