Class GridCellFormulaModel

This GridCellModel supports entering formulas in a grid cell. This support is provided through the Engine member of this class. Engine is a GridFormulaEngine.

Inheritance
System.Object
NonFinalizeDisposable
Disposable
GridCellModelBase
GridCellModel<GridCellTextBoxRenderer>
GridCellTextBoxModel
GridCellFormulaModel
Implements
System.IDisposable
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: Syncfusion.Windows.Controls.Grid
Assembly: Syncfusion.Grid.Wpf.dll
Syntax
public class GridCellFormulaModel : GridCellTextBoxModel, IDisposable
Remarks

The default behavior is that any cell whose CellType is GridCellFormulaModel will be interpreted as a formula cell provided the text in the cell starts with '='. So, for such cells you would enter formulas such as =A1+A2+A3 or =Sum(A1:A3), an an attempt would be made to parse and compute the entry.

Alternatively, you can use the Syncfusion.Windows.Controls.Grid.GridCellFormulaModel.formulaChar character to specify which cells of CellType GridCellFormulaModel are to be used as formulas. You set this formulaChar private property through the class constructor which passes this parameter. If you set this value to '\0', every cell of CellType GridCellFormulaModel will be treated as a formula.

The RefreshCells(Int32, Int32) method redraws all the formula cells that depend upon a particular cell. This method is called when the user changes a value that affects other formula cells.

The GetFormattedText(GridStyleInfo, Object, Int32) method is where the actual calculations are done, if necessary, through calls to the Engine methods. This method also conditionally parses the formula only if it has been modified since the previous parse.

Constructors

GridCellFormulaModel(GridModel)

Initializes a new GridCellFormulaModel object.

Declaration
public GridCellFormulaModel(GridModel grid)
Parameters
Type Name Description
GridModel grid

Fields

ACC

Declaration
public double ACC
Field Value
Type Description
System.Double

Properties

CalculatingSuspended

Gets or sets whether calculations should be done as values change in the underlying GridControl.

Declaration
public bool CalculatingSuspended { get; set; }
Property Value
Type Description
System.Boolean

Engine

Gets the GridFormulaEngine associated with the CellModel. GridFormulaEngine encapsulates all formula features. Use this object to add / remove library functions.

Declaration
public GridFormulaEngine Engine { get; }
Property Value
Type Description
GridFormulaEngine

FormulaChar

Gets or sets the formula character.

Declaration
public char FormulaChar { get; set; }
Property Value
Type Description
System.Char
Remarks

Set this field to a particular character such as '=' to conditionally flag a cell whose CellType is GridCellFormulaModel as holding a formula. If you do not set this field, then all cells of CellType GridCellFormulaModel that begin with '=' will be treated as a formula.

Grid

Gets the GridModel associated with this cell model.

Declaration
public GridModel Grid { get; }
Property Value
Type Description
GridModel

Methods

CreateRenderer()

Creates formula cell renderer.

Declaration
public override IGridCellRenderer CreateRenderer()
Returns
Type Description
IGridCellRenderer

The cell renderer that this method creates.
Overrides
Syncfusion.Windows.Controls.Grid.GridCellModel<Syncfusion.Windows.Controls.Grid.GridCellTextBoxRenderer>.CreateRenderer()

Dispose(Boolean)

Declaration
protected override void Dispose(bool disposing)
Parameters
Type Name Description
System.Boolean disposing
Overrides

GetFormattedText(GridStyleInfo, Object, Int32)

Triggers the parsing and computing of formulas.

Declaration
public override string GetFormattedText(GridStyleInfo style, object value, int textInfo)
Parameters
Type Name Description
GridStyleInfo style

The GridStyleInfo object that holds cell information.
System.Object value

The value to format.
System.Int32 textInfo

textInfo is a hint who is calling, default is GridCellBaseTextInfo.DisplayText.
Returns
Type Description
System.String

Either the computed value or the raw formula text.
Overrides
Remarks

Overridden to trigger the parsing and computing of formulas. The computed value is returned for non-editing cells. The raw formula text is returned when the cell is actively beng edited.

IsEmpty(String)

Returns whether the input string is null or has zero length.

Declaration
public static bool IsEmpty(string s)
Parameters
Type Name Description
System.String s

The input string.
Returns
Type Description
System.Boolean

True if null or zero length, false otherwise.

RefreshCells(Int32, Int32)

This method forces any formula cell dependent upon the passed-in cell in the row and column to be recomputed. This method is called by the model whenever the contents of the passed-in cell is changed. For example, the user changing a single non-formula cell may require the recomputing of several additional formula cells. This method triggers the redrawing of these dependent cells.

Declaration
public void RefreshCells(int row, int col)
Parameters
Type Name Description
System.Int32 row

Row index of the cell that was modifed by the user.
System.Int32 col

Column index of the cell that was modified by the user.

Implements

System.IDisposable