Merge pull request #2 from SwathiDhatchanamoorthi/master

ES-872871 Modify the ReadMe file and Description in KB examples

Author: vijayarasan

README.md

@@ -1,2 +1,60 @@
-# How to select a column in winforms datagrid?
-This example illustrates how to select a column in winforms datagrid
+# How to select the entire column in WinForms DataGrid (SfDataGrid)
+ 
+## Selection
+In [WinForms DataGrid](https://www.syncfusion.com/winforms-ui-controls/datagrid) (SfDataGrid) You can select the entire column in DataGrid using the [SfDataGrid.SelectCells](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_SelectCells_System_Object_Syncfusion_WinForms_DataGrid_GridColumn_System_Object_Syncfusion_WinForms_DataGrid_GridColumn_)
+method. You should set the [SfDataGrid.SelectionUnit](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_SelectionUnit) property as **Cell** or **Any** and the [SfDataGrid.SelectionMode](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_SelectionMode) property as **Extended** or **Multiple** for selecting the entire column. This column selection can be performed when clicking the column header using the [SfDataGrid.CellClick](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_CellClick) event.
+
+### C#    
+
+```C#
+public Form1()
+{
+    InitializeComponent();
+    this.sfDataGrid.SelectionUnit = SelectionUnit.Cell;
+    this.sfDataGrid.SelectionMode = GridSelectionMode.Extended;
+    this.sfDataGrid.CellClick += sfDataGrid_CellClick;
+}
+ 
+void sfDataGrid_CellClick(object sender, Syncfusion.WinForms.DataGrid.Events.CellClickEventArgs e)
+{
+    if (e.DataRow.RowType == RowType.HeaderRow && this.sfDataGrid.View.TopLevelGroup == null)
+    {
+        var firstRowDate = this.sfDataGrid.View.Records[0];
+        var lastRowData = this.sfDataGrid.View.Records[this.sfDataGrid.View.Records.Count - 1];
+        var column = e.DataColumn.GridColumn;
+ 
+        if (firstRowDate != null && lastRowData != null)
+        {
+            this.sfDataGrid.ClearSelection();
+            this.sfDataGrid.SelectCells(firstRowDate, column, lastRowData, column);
+        }
+    }
+}
+```
+
+### VB
+
+```VB
+Public Sub New()
+    InitializeComponent()
+    Dim data = New OrderInfoCollection()
+    sfDataGrid.DataSource = data.OrdersListDetails
+    Me.sfDataGrid.AllowSorting = False
+    Me.sfDataGrid.SelectionUnit = SelectionUnit.Cell
+    Me.sfDataGrid.SelectionMode = GridSelectionMode.Extended
+    AddHandler Me.sfDataGrid.CellClick, AddressOf sfDataGrid_CellClick
+End Sub
+ 
+Private Sub sfDataGrid_CellClick(ByVal sender As Object, ByVal e As Syncfusion.WinForms.DataGrid.Events.CellClickEventArgs)
+    If e.DataRow.RowType = RowType.HeaderRow AndAlso Me.sfDataGrid.View.TopLevelGroup Is Nothing Then
+       Dim firstRowDate = Me.sfDataGrid.View.Records(0)
+       Dim lastRowData = Me.sfDataGrid.View.Records(Me.sfDataGrid.View.Records.Count - 1)
+       Dim column = e.DataColumn.GridColumn
+       If firstRowDate IsNot Nothing AndAlso lastRowData IsNot Nothing Then
+          Me.sfDataGrid.ClearSelection()
+          Me.sfDataGrid.SelectCells(firstRowDate, column, lastRowData, column)
+       End If
+    End If
+End Sub
+```
+Take a moment to peruse the [WinForms DataGrid - Selection](https://help.syncfusion.com/windowsforms/datagrid/selection) documentation, where you can find about the selection with code examples.