I have a Textbox in Window1.xaml and want to change the value of the text in a code module called LoadData.vb which has a public sub where the sub name doesn't matter.

When I type in Window1. I seem to have nothing to reference the windows controls, how do I access controls such as the textbox?

Thanks...Kevin

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KSG

You have to pass the Window as argument to your method.

VB:

Module LoadData

    Sub TryingToChangeTextInTextBox(ByRef window1 As Window1)
        window1._textBox.Text = "Changed"
    End Sub
End Module

But I would not do that, its a bad design. Try touse the MVVM pattern and bind the textbox to a property of the ViewModel.

Add "Name" to the textbox...

<TextBox Name="myTextBox" Text="Some Text"/>


then inside code behind...

myTextBox.Text = "Changed text"


I advice you to look some introductory WPF articles so that you do things the right way instead of the winforms way.

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Software Engineer 1, My Blog

Hi Kevininstructor,

you can give the TextBox a name.

WPF creates a variable with the name _textBox for you.

You can access it in Window1 with Me._textBox = "My new Content".

Hope this helps.

Add "Name" to the textbox...

<TextBox Name="myTextBox" Text="Some Text"/>


then inside code behind...

myTextBox.Text = "Changed text"


I advice you to look some introductory WPF articles so that you do things the right way instead of the winforms way.

---

Software Engineer 1, My Blog

Thanks for your reply.

To be more specific, here is the TextBox in the XAML

<Window x:Class="Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" 
    Height="452" 
    Width="502" 
    xmlns:my="http://schemas.microsoft.com/wpf/2008/toolkit" 
    Name="Window1">
    <Grid>
        <TextBox Height="18" 
                 Name="TextBox1" 
                 Width="100" Text="Hello" />
    </Grid>
</Window>

Here is what I was thinking would work

Module LoadData

    Sub TryingToChangeTextInTextBox()
        window1.TextBox1.Text = "Changed"
    End Sub
End Module

When I try Window1 followed by the dot operator I get nothing.

---

KSG

Hi Kevininstructor,

you can give the TextBox a name.

<TextBox x:Name="_textBox" Text="Hello"/>

WPF creates a variable with the name _textBox for you.

You can access it in Window1 with Me._textBox = "My new Content".

Hope this helps.

Thanks for your reply!
I did provide a name for the textbox as shown below. but in my code module I get nothing for accessing the TextBox. If I try this directly in the window or a partial class of the window I then get access to the textbox but want to access the textbox in the speparate code module.

<Window x:Class="Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" 
    Height="452" 
    Width="502" 
    xmlns:my="http://schemas.microsoft.com/wpf/2008/toolkit" 
    Name="Window1">
    <Grid>
        <TextBox Height="18" 
                 Name="TextBox1" 
                 Width="100" Text="Hello" />
    </Grid>
</Window>

---

KSG

You have to pass the Window as argument to your method.

VB:

Module LoadData

    Sub TryingToChangeTextInTextBox(ByRef window1 As Window1)
        window1._textBox.Text = "Changed"
    End Sub
End Module

But I would not do that, its a bad design. Try touse the MVVM pattern and bind the textbox to a property of the ViewModel.

You have to pass the Window as argument to your method.

VB:

Module LoadData



    Sub TryingToChangeTextInTextBox(Window1 window1)

        window1._textBox.Text = "Changed"

    End Sub

End Module

But I would not do that, its a bad design. Try touse the MVVM pattern and bind the textbox to a property of the ViewModel.

I agree, not good to pass the window as an argument. I will have to study up on ViewModel. Didn't think it would be this much effort thou.
Thanks!

---

KSG