Concatenate String (VB.Net)

Concatenate string is one operation which allow us to combine two or more string together. In Concatenate operation, there are two operators (+) / (&). The difference of these two operators are:

• (+) Operator : the primary purpose of this operator is used to add two number, but we also can combine string too. (string1+string2+string3....)
• (&) Operator: can use only with string and string(string1 & string2).

In this tutorial, I use 3 textboxes and combine string together by displaying in message box.

Application Design

No	Control Type	Name	Text
1	Form1	FormConcatenate	Concatenate String
2	Textbox1	TextboxString1
3	Textbox2	TextboxString2
4	Textbox	TextboxString3
5	Button1	ButonPlus	Concatenate(+)
6	Button	ButonAnd	Concatenate(&)

Code

Using (+) Operator

Private Sub ButtonPlus_Click(sender As Object, e As EventArgs) Handles ButtonPlus.Click

        string1 = TextBoxString1.Text

        String2 = TextBoxString2.Text

        string3 = TextBoxString3.Text

        MessageBox.Show("The Concatenate String using +      is :" & string1 + String2 + string3)

 End Sub

Using (&) Operator

Private Sub ButtonAnd_Click(sender As Object, e As EventArgs) Handles ButtonAnd.Click

        MessageBox.Show("The Concatenate String using +      is :" & string1 & "---" & String2 & "---" & string3)

    End Sub

Whole Code

Public Class FormConcatenate

    Dim string1 As String

    Dim String2 As String

    Dim string3 As String

    Private Sub ButtonPlus_Click(sender As Object, e As EventArgs) Handles ButtonPlus.Click

        string1 = TextBoxString1.Text

        String2 = TextBoxString2.Text

        string3 = TextBoxString3.Text

        MessageBox.Show("The Concatenate String using +      is :" & string1 + String2 + string3)

    End Sub

    Private Sub ButtonAnd_Click(sender As Object, e As EventArgs) Handles ButtonAnd.Click

        MessageBox.Show("The Concatenate String using +      is :" & string1 & "---" & String2 & "---" & string3)

    End Sub

End Class


According the sample code below show that, if you want to combine string with more customize, it's better to use (&).

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