TextBox.Text not getting updated on second time

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I have written a code and bind a textbox to my username property in viewmodel.. When the window loads for the first time the textbox.text get updated but when i try to change the text from view model it does not get updated in textbox.text;

my xaml code for property is this

<TextBox Text="{Binding IntradayBP}" Height="23" HorizontalAlignment="Left" Margin="100,95,0,0" Name="textBox3" VerticalAlignment="Top" Width="120" IsReadOnly="True" />

and my code for that property in view model is this

XML

var resultIntradayBP = (from risk se in _abemodel.risks where se.description == RiskProfile select se.intradaybp).Single<decimal>();
           
            IntradayBP = Convert.ToDouble(resultIntradayBP);

Posted 16-Jan-11 7:49am

kayani29

Updated 16-Jan-11 8:54am

Abhishek Sur

v3

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Аslam Iqbal · Answer 1 · 2011-01-16T08:32:00

Solution 2

Set IsReadOnly="True" to IsReadOnly="False". Don't forget to Addnew record.

Posted 16-Jan-11 8:32am

Аslam Iqbal

Comments

kayani29 16-Jan-11 14:34pm

I changed that property to IsReadOnly to True .. still no success

Аslam Iqbal 16-Jan-11 14:36pm

Read my answer carefully.

kayani29 16-Jan-11 14:49pm

What do you mean by Addnew record??

Аslam Iqbal 16-Jan-11 15:05pm

After you insert or update a record then you have to call addnew_record before inserting new one.

Abhishek Sur · Answer 2 · 2011-01-16T08:58:00

To get a textbox updated when a property changes its value, implement your property from INotifyPropertyChanged.

http://www.abhisheksur.com/2010/05/object-notifiers-using.html[^]

You should also note, binding will not work if you explicitly set TextBox.Text somewhere in code behind.

Try removing any code that directly accesses your textbox, and update your text only from your ViewModel.

I hope it will work. :rose:

Dan Mos · Answer 3 · 2011-01-16T08:49:00

Solution 3

If Aslam Iqbal answer dosen't work try setting the binding mode to two way. Something like:

<textbox text="{Binding IntradayBP, Mode=TwoWay}" ....=""></textbox>

Posted 16-Jan-11 8:49am

Dan Mos

Comments

kayani29 16-Jan-11 14:56pm

I have tested that too.. no success

Vineeth P Joseph · Answer 4 · 2011-01-16T19:19:00

Solution 5

Hi,
If your view model implements INotifyPropertyChanged , trigger the propertyChanged of 'IntradayBP' after setting 'IntradayBP' .Otherwise you should implement INotifyPropertyChanged in your view model.

Regards,
Vineeth

Posted 16-Jan-11 19:19pm

Vineeth P Joseph