ES-976509 - Resolve Issues in Public Syncfusion Code Examples for DataGrid XAML Controls

Author: SreemonPremkumarM

HeaderCellsWithCheckBox.png

@@ -1,2 +1,76 @@
-# how-to-load-checkbox-in-header-cells
-This example illustrates how to load checkbox in header cells of GridDataBoundGrid control
+# How to Add a CheckBox to the Header Cell in the WinForms GridDataBoundGrid?
+
+This example illustrates how to add a checkbox to the header cells in the [WinForms GridDataBoundGrid](https://help.syncfusion.com/windowsforms/classic/databoundgrid/overview).
+
+To put a **CheckBox** in the **GridDataBoundGrid**, two events have to be used. The `QueryCellInfo` event is used to set the `style` properties and the `SaveCellInfo` event is used to save the cell's value. The value of the **CheckBox** cannot be stored in the **GridDataBoundGrid**, so any datatype/collection can be used to store the value. The `CheckBoxClick` event gets triggered when the **CheckBox** is clicked. In the following code example, the **CheckBox** is added to the Column header on the **GridDataBoundGrid**.
+
+#### C#
+
+``` csharp
+private bool CheckBoxValue = false;   
+private void Model_QueryCellInfo(object sender, GridQueryCellInfoEventArgs e)
+{
+   if(e.ColIndex > 0 && e.RowIndex == 0)
+   {
+      int colIndex1 = this.gridDataBoundGrid1.Binder.NameToColIndex("Column2");
+      if(colIndex1 == e.ColIndex)
+      {
+         e.Style.Description = "Check";
+         e.Style.CellValue = CheckBoxValue;
+         e.Style.CellValueType = typeof(bool);
+         e.Style.CheckBoxOptions = new GridCheckBoxCellInfo(true.ToString(), false.ToString(), "", true);
+         e.Style.CellType = "CheckBox";
+         e.Style.CellAppearance = GridCellAppearance.Raised;
+         e.Style.Enabled = true;
+      }
+   }
+}
+
+private void Model_SaveCellInfo(object sender, GridSaveCellInfoEventArgs e)
+{
+   if(e.ColIndex > 0 && e.RowIndex == 0)
+   {
+      int colIndex1 = this.gridDataBoundGrid1.Binder.NameToColIndex("Column2");
+      if(colIndex1 == e.ColIndex)
+      {
+         if(e.Style.CellValue != null)
+  CheckBoxValue = (bool)e.Style.CellValue;
+      }
+   }
+}
+```
+
+#### VB
+
+``` vb
+Private CheckBoxValue As Boolean = False
+Private Sub Model_QueryCellInfo(ByVal sender As Object, ByVal e As GridQueryCellInfoEventArgs)
+  If e.ColIndex > 0 AndAlso e.RowIndex = 0 Then
+    Dim colIndex1 As Integer = Me.gridDataBoundGrid1.Binder.NameToColIndex("Column2")
+    If colIndex1 = e.ColIndex Then
+      e.Style.Description = "Check"
+      e.Style.CellValue = CheckBoxValue
+      e.Style.CellValueType = GetType(Boolean)
+      e.Style.CheckBoxOptions = New GridCheckBoxCellInfo(True.ToString(), False.ToString(), "", True)
+      e.Style.CellType = "CheckBox"
+      e.Style.CellAppearance = GridCellAppearance.Raised
+      e.Style.Enabled = True
+    End If
+  End If
+End Sub
+
+Private Sub Model_SaveCellInfo(ByVal sender As Object, ByVal e As GridSaveCellInfoEventArgs)
+  If e.ColIndex > 0 AndAlso e.RowIndex = 0 Then
+    Dim colIndex1 As Integer = Me.gridDataBoundGrid1.Binder.NameToColIndex("Column2")
+    If colIndex1 = e.ColIndex Then
+      If e.Style.CellValue IsNot Nothing Then
+        CheckBoxValue = CBool(e.Style.CellValue)
+      End If
+    End If
+  End If
+End Sub
+```
+
+In the following screenshot, the **CheckBox** is added to the Column header on the **GridControl** and **GridDataBoundGrid**.
+
+![Image showing checkbox on headercell](HeaderCellsWithCheckBox.png)