Display TextBox in Windows Forms Calculator

4 Feb 20251 minute to read

The Calculator control has a display text area on its top corner, which displays all the digits and the calculations performed on the calculator. This display area is displayed by default. To hide this display area, set the ShowDisplayArea property to false.

The below properties controls the behavior of the display area.

• DisplayTextAlign
• Font
• DoubleValue

C#

this.calculatorControl1.DisplayTextAlign = System.Windows.Forms.HorizontalAlignment.Left;
this.calculatorControl1.DoubleValue = 5;
this.calculatorControl1.Font = new System.Drawing.Font("Verdana", 8.25F, System.Drawing.FontStyle.Bold);

VB.NET

Me.calculatorControl1.DisplayTextAlign = System.Windows.Forms.HorizontalAlignment.Left
Me.calculatorControl1.DoubleValue = 5
Me.calculatorControl1.Font = New System.Drawing.Font("Verdana", 8.25F, System.Drawing.FontStyle.Bold)

TextBox Value

The behavior of the TextBox value can be controlled using the below properties.

• Culture
• RepeatAssignAction
• UseUserOverride

C#

this.calculatorControl1.Culture = new System.Globalization.CultureInfo("en-US");
this.calculatorControl1.RepeatAssignAction = true;
this.calculatorControl1.UseUserOverride = true;

VB.NET

Me.calculatorControl1.Culture = New System.Globalization.CultureInfo("en-US")
Me.calculatorControl1.RepeatAssignAction = True
Me.calculatorControl1.UseUserOverride = True

See Also

How to customize the calculator display text area to use NumberGroupSeparator?