hi evry1 i'm creating a application in vb.net in which there are three textbox contol, one listbox contol,and one button. in listbox control there are three values , addition, subtraction and multiplication and my problem is taking values from two textbox contol, then selct one of the value from listbox contol and clicking on submit button the possible result display in third textbox ,but when i select one of the value from listbox contol there is a runtime error-- missingmember exception.
if any one can have any ideas then pls help me-- the code of my program is given below Public Class Form1 Dim a As Integer Dim b As Integer Dim c As Integer Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles TextBox2.TextChanged End Sub Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles TextBox1.TextChanged End Sub Public Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged End Sub Private Sub TextBox3_TextChanged(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles TextBox3.TextChanged End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles Button1.Click If ListBox1.Items(0).Selected Then a = TextBox1.Text b = TextBox2.Text c = a + b TextBox3.Text = c End If If ListBox1.Items(1).Selected Then a = TextBox1.Text b = TextBox2.Text c = a - b TextBox3.Text = c End If If ListBox1.Items(2).Selected Then a = TextBox1.Text b = TextBox2.Text c = a * b TextBox3.Text = c End If End Sub End Class -- GO and LEAD from Whereever You are. Think Big and Think Fast.
