Where does IBorder live in the IronXL API?

IBorder is an interface in the IronXL.Styles namespace, shipped in IronXL.dll. It is returned by the border properties of IStyle, such as TopBorder and BottomBorder, which come from Cell.Style or Range.Style.

What returns IBorder in IronXL?

The IStyle border properties return it: TopBorder, BottomBorder, LeftBorder, RightBorder, and DiagonalBorder. IronXL exposes IBorder through these get-only properties rather than letting you construct one, so a typical path is range.Style.BottomBorder.

Interface IBorder

Interface for cell border value

Namespace: IronXL.Styles

Assembly: IronXL.dll

Syntax

public interface IBorder

IBorder is what a cell's style hands back for one edge of its border. Each side of a cell, read through IStyle, returns this contract so a developer can set the line's color and weight independently, which is how a header underline or a boxed total is drawn.

A developer reaches IBorder through the border properties of IStyle: TopBorder, BottomBorder, LeftBorder, RightBorder, and DiagonalBorder, all get-only and all reached from Cell.Style or Range.Style. There is no construction step; read the side you want and set it. Assigning through a range's style applies the same edge across the whole selection.

Color sets the line color as an RGB string and Type takes a BorderType for the weight and style, such as thin, medium, or thick. The SetBorderStyle method sets both at once, accepting either a Color or an RGB string alongside a BorderType, and SetColor updates only the color. Set the type to a visible weight; a color alone on a None border will not render.

using IronXL;
using IronXL.Styles;

WorkSheet sheet = WorkBook.Load("report.xlsx").DefaultWorkSheet;
sheet["A1:D1"].Style.BottomBorder.SetBorderStyle("#000000", BorderType.Medium);

The border and alignment how-to covers borders in context, and the style cells, borders, and fonts example shows them alongside fonts and fills.

Properties

Color

Property that returns border color in rgb format.

Declaration

string Color { get; set; }

Property Value

Type	Description
System.String

Type

Gets or sets the type of the border line. See BorderType

Declaration

BorderType Type { get; set; }

Property Value

Type	Description
BorderType

Methods

SetBorderStyle(Color, BorderType)

Method for setting border type and color. Default border type is thin.

Declaration

void SetBorderStyle(Color color, BorderType type)

Parameters

Type	Name	Description
IronSoftware.Drawing.Color	color	Color value
BorderType	type	Border type enum

SetBorderStyle(String, BorderType)

Method for setting border type and color. Default border type is thin.

Declaration

void SetBorderStyle(string rgb, BorderType type)

Parameters

Type	Name	Description
System.String	rgb	Color rgb value
BorderType	type	Border type enum

SetColor(Color)

Method for setting border color with Color value

Declaration

void SetColor(Color color)

Parameters

Type	Name	Description
IronSoftware.Drawing.Color	color	Color value

SetColor(String)

Method for setting border color with the rgb string.

Declaration

void SetColor(string rgb)

Parameters

Type	Name	Description
System.String	rgb	Color rgb value