Cell Formatting in Excel a complete reference VBA, C#, VB.Net NumberFormat in Excel

Formatting

Helps to make data representation better based on requirement. Excel offers various formatting methods to make data look and feel great, like colors, background, shapes, images, hyperlinks, adding currency symbols, putting decimals, date time formatting and so on. In this article we will look for basic number formats which we can handle through code dynamically.

In Excel formatting is necessary as makeup for an actress. To represent data with its criticality make others focus so he/she can make sense what you intended for.

Prerequisites

Followings are the prerequisites which you may need to have to build the solution:

Visual Studio 2015 or above having Microsoft Office for Developer Tool installed
Create Excel Addin in C# code style (Visual Studio Tools for Office)
Create a ribbon designer and put button

Data Source

This image has an empty alt attribute; its file name is image-45-min.png

If you notice the Ribbon which is active in depicted screenshot “Chart Work VSTO“, I have placed Five buttons with following labels:

Bold: will make font bold
Italic : will make font italic
Underline : will make font underline
Fill Color : will fill color in given selected range or cells
Font Color : will change font color for selected range or cells

C# code to make font Bold

private void btnBold_Click(object sender, RibbonControlEventArgs e)
{
	//Capture user selection
	excel.Range oRange = Globals.ThisAddIn.Application.Selection;
	//Make font Bold
	oRange.Font.Bold = true;
}

Output

This image has an empty alt attribute; its file name is image-46-min.png

C# code to make font Italic

private void btn_italic_Click(object sender, RibbonControlEventArgs e)
{
	//Capture user selection
	excel.Range oRange = Globals.ThisAddIn.Application.Selection;
	//Make font italic
	oRange.Font.Italic = true;
}

Output

This image has an empty alt attribute; its file name is image-47-min.png

C# code to make font Underline

private void btnUnderline_Click(object sender, RibbonControlEventArgs e)
{
	//Capture user selection
	excel.Range oRange = Globals.ThisAddIn.Application.Selection;
	//Make font Underline
	oRange.Font.Underline = true;
}

Output

This image has an empty alt attribute; its file name is image-48-min.png

C# code to fill background Color

private void btnFillColor_Click(object sender, RibbonControlEventArgs e)
{
	//Capture user selection
	excel.Range oRange = Globals.ThisAddIn.Application.Selection;
	//Fil Cell color
	oRange.Interior.Color = excel.XlRgbColor.rgbBlue;
}

Output

This image has an empty alt attribute; its file name is image-49-min.png

C# code to change Font Color

private void btnFontColor_Click(object sender, RibbonControlEventArgs e)
{
	excel.Range oRange = Globals.ThisAddIn.Application.Selection;
	//Make font Underline
	oRange.Font.Color = excel.XlRgbColor.rgbRed;
}

Output

This image has an empty alt attribute; its file name is image-50-min.png

NumberFormat

A range object offers NumberFormat property by which we can apply number formatting over the data. Let’s see an example for all basic formatting which can be applied over cells using VBA, VSTO (Visual Studio Tools for Office) C# and Vb.Net.

VBA code example

Public Sub NumberFormat()
    'Capture user selection
    Dim oRange As Range
    Set oRange = Selection
    
    'Convert into number
    oRange.NumberFormat = "0.00"
    
    'Convert into General
    oRange.NumberFormat = "General"
    
    'Convert into Currency
    oRange.NumberFormat = "$#,##0.00"
    
    'Convert into Accounting
    oRange.NumberFormat = "_($* #,##0.00_);_($* (#,##0.00);_($* ""-""??_);_(@_)"
    
    'Convert into Short Date
    oRange.NumberFormat = "m/d/yyyy"
    
    'Convert into Long Date
    oRange.NumberFormat = "[$-x-sysdate]dddd, mmmm dd, yyyy"
    
    'Convert into Time
    oRange.NumberFormat = "[$-x-systime]h:mm:ss AM/PM"
    
    'Convert into Percentage
    oRange.NumberFormat = "0.00%"
    
    'Convert into Fraction
    oRange.NumberFormat = "# ?/?"
    
    'Convert into Scientific
    oRange.NumberFormat = "0.00E+00"
    
    'Convert into Text
    oRange.NumberFormat = "@"
    
    'Increase 3 decimal in current Range
    oRange.NumberFormat = "0.000"
    
    'Decrease 1 decimal in current Range
    oRange.NumberFormat = "0.00"
    
    'Memory cleanup
    Set oRange = Nothing
End Sub

C# code example

private void btnNumberFormat_Click(object sender, RibbonControlEventArgs e)
{
	//Capture user selection
	excel.Range oRange = Globals.ThisAddIn.Application.Selection;
	
	//Convert into number
	oRange.NumberFormat="0.00";
	
	//Convert into General
	oRange.NumberFormat="General";
	
	//Convert into Currency
	oRange.NumberFormat="$#,##0.00";
	
	//Convert into Accounting
	oRange.NumberFormat="_($* #,##0.00_);_($* (#,##0.00);_($* ""-""??_);_(@_)";
	
	//Convert into Short Date
	oRange.NumberFormat = "m/d/yyyy";
	
	//Convert into Long Date
	oRange.NumberFormat = "[$-x-sysdate]dddd, mmmm dd, yyyy";
	
	//Convert into Time
	oRange.NumberFormat = "[$-x-systime]h:mm:ss AM/PM";
	
	//Convert into Percentage
	oRange.NumberFormat = "0.00%";
	
	//Convert into Fraction
	oRange.NumberFormat = "# ?/?";
	
	//Convert into Scientific
	oRange.NumberFormat = "0.00E+00";
	
	//Convert into Text
	oRange.NumberFormat = "@";
	
	//Increase 3 decimal in current Range
	oRange.NumberFormat = "0.000";
	
	//Decrease 1 decimal in current Range
	oRange.NumberFormat = "0.00"
}

VB.Net code example

Private Sub btnNumberFormat_Click(sender As Object, e As RibbonControlEventArgs) Handles btnNumberFormat.Click
	'Capture user selection
    Dim oRange As excel.Range
	oRange= Globals.ThisAddIn.Application.Selection
    
    'Convert into number
    oRange.NumberFormat="0.00"
    
    'Convert into General
    oRange.NumberFormat="General"
    
    'Convert into Currency
    oRange.NumberFormat="$#,##0.00"
    
    'Convert into Accounting
    oRange.NumberFormat="_($* #,##0.00_);_($* (#,##0.00);_($* ""-""??_);_(@_)"
    
    'Convert into Short Date
    oRange.NumberFormat = "m/d/yyyy"
    
    'Convert into Long Date
    oRange.NumberFormat = "[$-x-sysdate]dddd, mmmm dd, yyyy"
    
    'Convert into Time
    oRange.NumberFormat = "[$-x-systime]h:mm:ss AM/PM"
    
    'Convert into Percentage
    oRange.NumberFormat = "0.00%"
    
    'Convert into Fraction
    oRange.NumberFormat = "# ?/?"
    
    'Convert into Scientific
    oRange.NumberFormat = "0.00E+00"
    
    'Convert into Text
    oRange.NumberFormat = "@"
    
    'Increase 3 decimal in current Range
    oRange.NumberFormat = "0.000"
    
    'Decrease 1 decimal in current Range
    oRange.NumberFormat = "0.00"
End Sub

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Next: Conditional formatting in Excel VSTO C#

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Cell Formatting in Excel a complete reference VBA, C#, VB.Net

Formatting

Prerequisites

Data Source

C# code to make font Bold

Output

C# code to make font Italic

Output

C# code to make font Underline

Output

C# code to fill background Color

Output

C# code to change Font Color

Output

NumberFormat

VBA code example

C# code example

VB.Net code example

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