having issue in validation more than one textbox in wpf

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5.00/5 (1 vote)

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Hi,
i am trying to validate more than one textbox through i multivalueconverter in wpf , i have binded this textbox to isenabled property of button , if there is any error button should get disabled.

i am having this condition in my class

C#

public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
     {
         foreach (var isValid in values)
             if (isValid as bool? == false)
             {
                 return false;
             }
         return true;
     }

and i have done validation through validation rule class , but i think there is some issue with the above condition every time it return true only.it dosent get inside the if condtion and return false .

Posted 1-Jan-14 23:18pm

kumar9avinash

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Comments

Karthik_Mahalingam 2-Jan-14 5:31am

did u check the "Values" ?
is this contains all "true" ??

Naz_Firdouse 2-Jan-14 5:58am

debug your code and see what value is assigned for isValid in Values...

kumar9avinash 2-Jan-14 7:01am

((System.Windows.Controls.ValidationError)(values[0])).BindingInError {System.Windows.Data.BindingExpression}
this value is getting stored in values
and in is valid i am geting this value=isValid {System.Windows.Controls.ValidationError}

Naz_Firdouse 2-Jan-14 8:23am

could you share sample code to know how you are using converter?

kumar9avinash 3-Jan-14 1:02am

i changed my loop to this and its working fine
foreach (var isValid in values)

if (isValid as ValidationError != null)
{
return false;
}
return true;

2 solutions

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Tesfamichael G. · Accepted Answer · 2014-01-03T01:55:00

Try this one and tell me the outcome.

public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
foreach (var isValid in values)

if (isValid != DependencyProperty.UnsetValue && isValid !=null)
{
if (isValid as bool? == false)
{
return false;
}

}
return true;
}

kumar9avinash · Accepted Answer · 2014-01-15T23:47:00

Solution 2

i changed my loop to this and its working fine foreach (var isValid in values) if (isValid as ValidationError != null) { return false; } return true;

Posted 15-Jan-14 23:47pm