TextBox.TextChanged fires twice befor Form load

Question

1.00/5 (1 vote)

See more:

Hey,
I'm using Add-in to create controls dynamically from access form to vb.net form , after loading the design and creating the controls using the add-in I've tried to use textchanged on one of the textboxes and it fires twice even before the form load and on textbox1.text = something ? what the problem would be ?
thank in advance for you help =)

Posted 23-Sep-12 22:17pm

ayat abukhadra

Add a Solution

4 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Аslam Iqbal · Accepted Answer · 2012-09-23T22:46:00

Solution 1

You change your textbox1.text in more than 1 locations.

C#

1. InitializeComponent();
//------------And other
2. Form_Load() //OR somewhere else

So, TextChanged event fires twice.

Posted 23-Sep-12 22:46pm

Аslam Iqbal

Anshul R · Accepted Answer · 2012-09-25T03:52:00

Solution 4

Declare a global variableto count the number of text changes. Increment it in TextChange().

Handle your textchange only when the counter is greater than 2.

Put it in your initializecomponent to see if its called twice.

Posted 25-Sep-12 3:52am

Anshul R

Comments

ayat abukhadra 26-Sep-12 3:28am

I found out whats wrong I'm initiating the .text property when creating the textbox and that causes the firing up for it TextChange function =) ,, thanks for your help =)

ayat abukhadra · Accepted Answer · 2012-09-23T23:32:00

How I'm Creating my textbox in my Add-in
1.Load the access control
2.Check if its a text box
3.create a textBox and Call a function called AddTextBox

Private Function AddTextBox(byVal objWindow as EnvDTE.Window, ByVal TextBoxName As String) As TextBox

Dim ObjDesignerHost As IDesignerHost
Dim ObjIComponent As Icomponent
Dim ObjPropertyDescriptor As ProperityDescriptor
Dim TxtBox As TextBox
Dim ObjIComponentInitializer As IComponentInitializer

ObjDesignerHost = DirectCast(ObjWindow.Object , IDesignerHost)
ObjIComponent=ObjDesignerHost.CreateComponent(GetType(TextBox),TextBoxName)
ObjPropertyDescriptor= System.ComponentModel.TypeDescriptor.GetProperties(ObjIComponent).Item("Parent")
ObjPropertyDescriptor.SetValue(ObjIComponent,ObjDesignerHost.RootComponent)
TxtBox=DirectCast(ObjIComponent,TextBox)
ObjIComponentInitializer=TryCast(ObjDesignerHost.GetDesigner(TxtBox),IComponentInitializer)
If(Not ObjIComponentInitializer Is Nothing) Then
ObjIComponentInitializer.InitializeNewComponent(defaultValues:=Nothing)
TxtBox.Text=TextBoxName
Return TxtBox

End Function

Am I doing anything wrong ?

ayat abukhadra · Accepted Answer · 2012-09-23T23:10:00

Solution 2

I've searched the designer code and the form code form a second call to InitializeComponent() my Form code contains nothing except Form1_Load and the textbox_TextChanged and both are empty but my textbox_TextChanged keeps firing twice before the load ?

Posted 23-Sep-12 23:10pm