Binding validation to textBox runTime

Binding validation to textBox runTime

hello , dear

how i can set validation to textBox runtime

i usnig this code but not get any result

this code in XAML is working 

Text="{Binding CustName, Mode=TwoWay, NotifyOnValidationError=True, UpdateSourceTrigger=Default, ValidatesOnExceptions=True}" 

but in code behaind not working

var pCustName= new Binding(DataValidation.MandatoryFields.ValidEmpty)
{
Path = new PropertyPath("Text"),
ElementName = DataValidation.MandatoryFields.CustName,
Mode = BindingMode.TwoWay,
UpdateSourceTrigger = UpdateSourceTrigger.Default,
ValidatesOnExceptions = true,
NotifyOnValidationError = true
};
txtCustName.SetBinding(TextBox.TextProperty, pCustName);

greeting 

sayed eltokhy

Answers & Comments...

Answer: 1

you were creating a binding that bound to "Text", but in xaml you're binding to "CustName".  also, in code you're forcing it to look at an element, which your xaml doesn't do.  this might work better:

var pCustName= new Binding(DataValidation.MandatoryFields.ValidEmpty)
{
Path = new PropertyPath("CustName"),
Mode = BindingMode.TwoWay,
UpdateSourceTrigger = UpdateSourceTrigger.Default,
ValidatesOnExceptions = true,
NotifyOnValidationError = true
};
txtCustName.SetBinding(TextBox.TextProperty, pCustName);

Answer: 2

Hi, please refer to this post: http://forums.silverlight.net/t/247948.aspx/1 

Hope this will help you.

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