Solved

forms visual basic .net -500

Posted on 2004-04-08
6
214 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

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

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

Recently, in one of the tech-blogs I usually read, I saw a post about the best-selling video games through history. The first place in the list is for the classic, extremely addictive Tetris. Well, a long time ago, in a galaxy far far away, I was…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …
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…

803 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