This tutorial is all about How to Validate Double Value in VB.Net. With this tutorial you can Validate Double Value in VB.Net easily. So let’s get started:
- First is open the Visual Basic, Select File on the menu, then click New and create a new project.
- Then a New Project Dialog will appear. You can rename your project, depending on what you like to name it. After that click OK
- Design your form like this just like what I’ve shown you below.
Add a Label, Button and Textbox.
- Add this following function.
[vbnet] Function validateDoublesAndCurrency(ByVal stringValue As String) As Boolean
Dim rslt As Boolean = False
Dim value As Double
Dim valueToTest As String = stringValue
TryvalueToTest = Double.Parse(stringValue, Globalization.NumberStyles.Currency)
Catch ex As ExceptionEnd Try
If Double.TryParse(valueToTest, value) Then
rslt = True
rslt = False
- Then add this code to the button.
[vbnet] Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If validateDoublesAndCurrency(TextBox1.Text) = False Then
MsgBox(“Price entered is not valid”)
MsgBox(“Price is Valid”)
- Finally, Click F5 to run.
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Download How to Validate Double Value in VB.Net Code Here
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