Solved

forms visual basic .net -500

Posted on 2004-04-08
6
222 Views
Last Modified: 2013-12-04
i am writing a program in visual studio .net
i have five forms made (form1,form2,form3,form4,form5)

i want the code to open a given form by name.
for example to give the "form2" in a textbox
and then create an instanse of the form "form2" as x and then open the x  on the program .
thanx

0
Comment
Question by:voulgaris
6 Comments
 
LVL 1

Expert Comment

by:Leroyski
ID: 10781936
what language are you using, Visual Basic?

If so, all you need to do is:

formname.show

So, if you want form1 to be opened:

form1.show
0
 
LVL 19

Accepted Solution

by:
Desp earned 250 total points
ID: 10782013
Unfortunately there is no direct way to do this in VB.NET you have to perform checks on the contents of the textbox
like this:

'**********************
Select Case TextBox1.Text
            Case "form1"
                Dim frm1 As New Form1()
                frm1.Show()

            Case "form2"
                Dim frm2 As New Form2()
                frm2.Show()

                .........

End Select

'**********************
0
 
LVL 48

Assisted Solution

by:AlexFM
AlexFM earned 250 total points
ID: 10782263
This is result of my test. Create new VB.NET Windows application. Add Button1 and TextBox1 to Form1. Add new Form2 and Form3 to the project. This is Form1 code:

Imports System.Reflection
Imports System.Text
...

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim a As [Assembly]
        Dim f As Form
        Dim s As StringBuilder

        Try
            a = [Assembly].GetExecutingAssembly()

            s = New StringBuilder
            s.Append(a.GetName().Name)
            s.Append(".")
            s.Append(TextBox1.Text)

            f = CType(a.CreateInstance(s.ToString()), Form)

            If f Is Nothing Then
                MessageBox.Show(Me, "Type not found")
            Else
                f.ShowDialog(Me)
            End If

        Catch ex As Exception
            MessageBox.Show(Me, ex.Message)
        End Try
    End Sub

Type Form2 or Form3 in the textbox and press the button.
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10782969
I would vote for reflection. Takes care of all forms, so tomorrow if you add a new form, then you don't need to code another case in the switch construct. Handling exceptions could also be easy.
0

Featured Post

Active Directory Webinar

We all know we need to protect and secure our privileges, but where to start? Join Experts Exchange and ManageEngine on Tuesday, April 11, 2017 10:00 AM PDT to learn how to track and secure privileged users in Active Directory.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is meant to give a basic understanding of how to use R Sweave as a way to merge LaTeX and R code seamlessly into one presentable document.
This is about my first experience with programming Arduino.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question