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AnswerRe: DataGrid Columnm Header Style Pin
Gerry Schmitz17-Feb-21 6:14
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QuestionGridView CellTemplate Pin
#realJSOP13-Feb-21 10:42
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AnswerRe: GridView CellTemplate Pin
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GeneralRe: GridView CellTemplate Pin
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AnswerRe: GridView CellTemplate Pin
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GeneralRe: GridView CellTemplate Pin
Gerry Schmitz14-Feb-21 5:53
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GeneralRe: GridView CellTemplate Pin
#realJSOP14-Feb-21 8:41
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GeneralRe: GridView CellTemplate Pin
Gerry Schmitz14-Feb-21 10:48
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QuestionIcon Strangeness Pin
#realJSOP2-Feb-21 23:36
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AnswerRe: Icon Strangeness Pin
Gerry Schmitz3-Feb-21 7:25
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QuestionDispatcherTimer Pin
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AnswerRe: DispatcherTimer Pin
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AnswerRe: DispatcherTimer Pin
Gerry Schmitz15-Jan-21 2:31
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QuestionBetter way to access ViewModels Pin
Mc_Topaz5-Jan-21 4:11
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AnswerRe: Better way to access ViewModels Pin
Gerry Schmitz5-Jan-21 21:01
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AnswerRe: Better way to access ViewModels Pin
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GeneralRe: Better way to access ViewModels Pin
michaelbarb10-Jan-21 8:20
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GeneralRe: Better way to access ViewModels Pin
#realJSOP10-Jan-21 11:15
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AnswerRe: Better way to access ViewModels Pin
#realJSOP21-Feb-21 0:42
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QuestionIDataErrorInfo Pin
#realJSOP28-Dec-20 4:15
mva#realJSOP28-Dec-20 4:15 
Alright, I'm at a loss. I'm trying to get a TextBox to display WPF's default red border around the control. I know for a fact that the error condition is being detected, but the border color isn't changing. I think I'm just bench blind, but I've been playing with this for two days now with no success. Can anyone see/think of anything I'm doing wrong?

0) I've implemented IDataErrorInfo on my control (which already inherits INotifyPropertyChanged):
public partial class WizPgQuery : WizardPageBase, IDataErrorInfo
    public string this[string columnName]
            string value;
            switch (columnName)
                case "ClassName": value = this.ValidateClassName(); break;
                case "QueryText": value = this.ValidateQueryText(); break;
                default         : value = string.Empty;             break;
            return value;

    public string Error
        get { throw new NotImplementedException(); }

1) I have my property and validation routines implemented
private string className;
public string ClassName
    get { return this.className; }
        if (value != this.className)
            this.className = value;

private string ValidateClassName()
    string value = (this.ClassName.IsValidClassName())
                    ? ""
                    : "The class name must be a valid C# identifier.";
    // just to make sure it's getting called
    if (!string.IsNullOrEmpty(value)) { SystemSounds.Beep.Play(); }
    return value;

2) My XAML looks like this:
<TextBox x:Name="textboxClassName" Grid.Column="1" 
         Text="{Binding Path=ClassName, 
         ToolTip="Base tool tip" />

3) No dynamic/static resources defined that might override WPF's default presentation behavior
".45 ACP - because shooting twice is just silly" - JSOP, 2010
You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013

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