VGridControlBase.GetPrev(BaseRow) Method

Returns the row previous to the specified one.

Namespace: DevExpress.XtraVerticalGrid

Assembly: DevExpress.XtraVerticalGrid.v19.1.dll

Declaration

C#

public BaseRow GetPrev(
    BaseRow row
)

VB.NET

Public Function GetPrev(
    row As BaseRow
) As BaseRow

Parameters

Name	Type	Description
row	BaseRow	A BaseRow descendant that represents the row whose previous row is returned.

Returns

Type	Description
BaseRow	A BaseRow descendant that represents the row previous to the specified one.

Remarks

The GetPrev method gets the row previous to the specified one. This can be especially useful when rows are arranged in a tree structure. The GetPrev method returns the null reference in the instances listed below:

• the row specified as the parameter is the null reference or belongs to another vertical grid;
• the row specified as the parameter is the first row.

Example

The following sample code demonstrates how to make visible all hidden category rows. The VGridControlBase.GetPrev and VGridControlBase.GetLast methods are used to traverse through the rows.

C#

private void HideAllCategoryRows(){
   BaseRow row = vGridControl1.GetLast();
   while (row != null){
      if ((row is CategoryRow) && (row.Visible == false)){
         row.Visible = true;
      }
      row = vGridControl1.GetPrev(row);
   }
}

VB.NET

Private Sub HideAllCategoryRows()
   Dim row As BaseRow = VGridControl1.GetLast()
   While Not row Is Nothing
      If TypeOf row Is CategoryRow And row.Visible = False Then
         row.Visible = True
      End If
      row = VGridControl1.GetPrev(row)
   End While
End Sub