[RESOLVED] Button cannot do job if...[HELP]

I want it so that when i click a button(button1) and there is no text in textbox1, the button does not work and a msgbox comes out saying "You need to enter a text". What will the code be? Thanks!

Quote:

---

Originally Posted by x DeaDLy

I want it so that when i click a button(button1) and there is no text in textbox1, the button does not work and a msgbox comes out saying "You need to enter a text". What will the code be? Thanks!

---

vb.net Code:

Private Sub btnButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnButton1.Click
    If TextBox1.Text = "" Then
        MessageBox.Show("You need to enter a text", "Missing Information", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
    End If
End Sub

Quote:

---

Originally Posted by JugglingReferee

vb.net Code:

Private Sub btnButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnButton1.Click
    If TextBox1.Text = "" Then
        MessageBox.Show("You need to enter a text", "Missing Information", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
    End If
End Sub

---

Thank you so much! +rep

Ok what my button does is generate a random code, i implemented this code and it does show the error message box but, it still generates a code in "TEXTBOX2" How can i not make it generate a random code in textbox2 if there is no text in textbox1?

Also, note that you did say "the button does not work". You can disable the button so that it will not respond if a user tries to click it:

vb.net Code:

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
    If TextBox1.Text = "" Then
        Button1.Enabled = False
    Else If TextBox1.Text <> "" Then
        Button1.Enabled = True
    End If
End Sub

Quote:

---

Originally Posted by JugglingReferee

Also, note that you did say "the button does not work". You can disable the button so that it will not respond if a user tries to click it:

vb.net Code:

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
    If TextBox1.Text = "" Then
        Button1.Enabled = False
    Else If TextBox1.Text <> "" Then
        Button1.Enabled = True
    End If
End Sub

---

THX SO MUCH and i found the right code to make this work

Code:

---

If TextBox1.Text = "" Then
            MessageBox.Show("You need to enter a text", "Missing Information", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
            TextBox2.Text = "NO TEXT ENTERED!"
        Else
            TextBox2.Text = generateRandomCombination()
        End If

---

Thx for the help

Quote:

---

Originally Posted by x DeaDLy

Ok what my button does is generate a random code, i implemented this code and it does show the error message box but, it still generates a code in "TEXTBOX2" How can i not make it generate a random code in textbox2 if there is no text in textbox1?

---

So you've already got code in Button1 that generates something for TextBox2.

Change the code to this:

vb.net Code:

Private Sub btnButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnButton1.Click
    If TextBox1.Text = "" Then
        MessageBox.Show("You need to enter a text", "Missing Information", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
    Else If TextBox1.Text <> "" Then
 
        ' in this section, put the code that generates the code for TextBox2.
 
    End If
End Sub

If TextBox1.Text = "" Then

MessageBox.Show("You need to enter a text", "Missing Information", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)

Else If TextBox1.Text <> "" Then

' in this section, put the code that generates the code for TextBox2.

End If



The red code will check to see if TextBox1 is blank. If it is blank, then the error Message Box is shown.

The blue code will check to see if the TextBox1 is not blank. If it is not blank, then the code that fills TextBox2 is executed.

Quote:

---

Originally Posted by x DeaDLy

THX SO MUCH and i found the right code to make this work

Code:

---

If TextBox1.Text = "" Then
            MessageBox.Show("You need to enter a text", "Missing Information", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
            TextBox2.Text = "NO TEXT ENTERED!"
        Else
            TextBox2.Text = generateRandomCombination()
        End If

---

Thx for the help

---

Yup, that works too!