Data in a Binded Text of DataGridTextcolumn does not appear un till Making the Column in editable Mode

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hi guys
i have a data grid with columns Called Taxes i made a style to this Column to manage me Fire Event (Text Changed) when any thing Typed in this Column bu user , i succeed in doing that but now when i type in the column it fire the Event As i Want , the problem is the data i typed in the column does not Appear only if the Column is in editable mode else the data disappear , how can i solve that
thanks in advanced

My code :-

HTML

<datagridtextcolumn loc:translate.uid="1629" header="{loc:Translate   Taxes}" width="Auto" xmlns:loc="#unknown">
                    <datagridtextcolumn.editingelementstyle>
                        <Style TargetType="TextBox">
                            <setter>
                                <setter.property>
                                    Text
                                </setter.property>
                                <setter.value>
                                    <binding>
                                        <binding.path>Tax</binding.path>
                                        <binding.mode>TwoWay</binding.mode>
                                        <binding.updatesourcetrigger>PropertyChanged</binding.updatesourcetrigger>
                                    </binding>
                                </setter.value>
                            </setter>
                            <eventsetter event="TextChanged" handler="Txt_Tax_TextChanged" />                            
                        </Style>
                    </datagridtextcolumn.editingelementstyle>
                </datagridtextcolumn>

C#

private void Txt_Tax_TextChanged(object sender, TextChangedEventArgs e)
        {
            try
            {
                this.UpdateTotal();
            }
            catch
            {

            }
        }

Posted 3-Nov-11 3:49am

Yasser El Shazly

Updated 3-Nov-11 3:51am

v2

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Yasser El Shazly 3-Nov-11 10:33am

i think there is A problem in the Visual tree , or some thing make it does not see the data is right if so can be resolved ..?

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Wayne Gaylard · Answer 1 · 2011-11-03T04:36:00

You should bind your TextColumn to a property in the codebehind/viewmodel. Then in the setter for that property you can increase the taxes appropriately. Something like this :-

XML

<datagridtextcolumn binding="{Binding" path="Tax}/"></datagridtextcolumn>

and in your code behind

C#

decimal tax;
decimal totalTaxes;
public decimal Tax
        {
            get { return tax; }
            set
            {
                if (tax == value) return;
                tax = value;
                totalTaxes += value;
                OnPropertyChanged("Tax");
            }
}

Hope that helps