How Do I Sum Numbers In a TextBox

wb8bgy · December 10th, 2005, 01:12 PM

Boy, I seem to be having trouble with the simple things now! In most of my Access applications I do a lot of summing of numbers entered in Text Boxes and the results are stored in other Text Boxes.

Have tried several schemes but continue to get:

Operator '+' is not defined for types 'System.Windows.Forms.TextBox'

Does this mean there is no way to do calculations using data entered into text boxes?

How about a short example of how to get input from two text boxes and sum them to a third text box that is tied to a table.

Thanks,

George

Ankur_Verma · December 10th, 2005, 01:29 PM

George, first of all you get the value in the textbox with this syntex

Code:

 textBox1.Text

if textBox1 is the name of your textbox control.

Secondly, if you would write somthing like

Code:

 textBox1.Text + textBox2.Text

you will not get the sum but the concatination of the two values stored
in the two text boxes, cause everthing in text boxes is treated as a string
in VB .NET. You will acutally have to do something like

Code:

 Convert.ToInt32(textBox1.Text) + Convert.ToInt32(textBox1.Text)

to get the sum.

Simple thing it is, no doubt, but it'll take u some time to get accustumed VB .NET's ways.
But you will be doing fine, I'm sure, 'cause VB .NET is a very friendly language otherwise.

Regards
Ankur Verma