Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

WPF DataGrid Display Errors

Posted on 2013-01-29
13
Medium Priority
?
1,725 Views
Last Modified: 2013-02-12
My WPF DatagRid displays a red exclamation mark when I change data on a row or add a new row.

It is interesting that on a new row the exclamation mark remains whereas on an edited row it disappears after a few seconds after moving to a different row.

How can i see what the errors are?
0
Comment
Question by:Adapt2NL
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 8
  • 5
13 Comments
 
LVL 96

Accepted Solution

by:
Bob Learned earned 1500 total points
ID: 38833579
You can get the DataGrid errors from the row, as described in this article:

WPF DataGrid Practical Examples
http://www.codeproject.com/Articles/30905/WPF-DataGrid-Practical-Examples

<Style x:Key="RowStyle" TargetType="{x:Type dg:DataGridRow}">
    <Setter Property="ValidationErrorTemplate">
        <Setter.Value>
            <ControlTemplate>
                <Grid>
                    <Ellipse Width="12" Height="12"
                        Fill="Red" Stroke="Black"
                        StrokeThickness="0.5"/>
                    <TextBlock FontWeight="Bold" Padding="4,0,0,0"
                        Margin="0" VerticalAlignment="Top" Foreground="White" Text="!"
                        ToolTip="{Binding RelativeSource={RelativeSource
                                 FindAncestor, AncestorType={x:Type dg:DataGridRow}},
                                 Path=(Validation.Errors)[0].ErrorContent}"
/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
0
 

Author Comment

by:Adapt2NL
ID: 38834898
I have added that XAML. I am assuming then if put my mouse over the exclamation mark, I would see a tool-tip. but I don't! Am I missing something?
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 38834964
Can you show me your XAML please?
0
Containers & Docker to Create a Powerful Team

Containers are an incredibly powerful technology that can provide you and/or your engineering team with huge productivity gains. Using containers, you can deploy, back up, replicate, and move apps and their dependencies quickly and easily.

 

Author Comment

by:Adapt2NL
ID: 38834966
Here is the DatGrid
                        <DataGrid x:Name="inventoryDataGrid" EnableRowVirtualization="True"
                                  ItemsSource="{Binding Source={StaticResource InventoryVS},  diag:PresentationTraceSources.TraceLevel = High}" RowDetailsVisibilityMode="VisibleWhenSelected"
                                  Grid.RowSpan="1"
                                                                  Margin="6" AlternatingRowBackground="AliceBlue" AutoGenerateColumns="False"
                                  IsReadOnly="{Binding EnableOpposite}"
                                      ColumnHeaderStyle="{StaticResource HeaderStyle}" HorizontalGridLinesBrush="{Binding BrushForBorder}"
                                  VerticalGridLinesBrush="{Binding BrushForBorder}"
                                  >
                            <DataGrid.Columns>

                                <DataGridComboBoxColumn Header="Product"
                                                        ItemsSource="{Binding Source={StaticResource MainScreenObject}, Path=Products}"  
                                                      SelectedValueBinding="{Binding lngProductID}"
                                                       
                                                      DisplayMemberPath="strProductName"
                                                      SelectedValuePath="lngHardwareID"
                                                        >
                                   
                                </DataGridComboBoxColumn>
                                <DataGridTextColumn x:Name="strFluent2TagColumn" Binding="{Binding strFluent2Tag}" Header="Fluent2 Tag" Width="Auto"/>
                                <DataGridTextColumn x:Name="strManSerialNumberColumn" Binding="{Binding strManSerialNumber}" Header="Man Serial Number" Width="Auto"/>
                                <DataGridTextColumn x:Name="strManProductCodeColumn" Binding="{Binding strManProductCode}" Header="Man Product Code" Width="Auto"/>
                                <DataGridTextColumn x:Name="strManActivationKeyColumn" Binding="{Binding strManActivationKey}" Header="Man Activation Key" Width="Auto"/>
                                <DataGridTemplateColumn x:Name="dteInstalledColumn" Header="Installed" Width="Auto">
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <DatePicker SelectedDate="{Binding dteInstalled, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}"/>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>
                                <DataGridCheckBoxColumn x:Name="chkPreventReqColumn" Binding="{Binding chkPreventReq}" Header="Prevent Req" Width="Auto"/>
                                <DataGridTemplateColumn x:Name="dtePMLastDoneColumn" Header="PM Last Done" Width="Auto">
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <DatePicker SelectedDate="{Binding dtePMLastDone, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}"/>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>

                            </DataGrid.Columns>
                        </DataGrid>
0
 

Author Comment

by:Adapt2NL
ID: 38834969
Bound To

        <CollectionViewSource x:Key="CustomerVS" Source="{Binding Customer.CustomerDT, Source={StaticResource MainScreenObject}}"/>
        <CollectionViewSource x:Key="ContactsVS" Source="{Binding FK_Customer_Contact, Source={StaticResource CustomerVS}}"/>
        <CollectionViewSource x:Key="SitesVS" Source="{Binding FK_Customer_Site, Source={StaticResource CustomerVS}}"/>
        <CollectionViewSource x:Key="InventoryVS" Source="{Binding FK_Customer_Inventory, Source={StaticResource CustomerVS}}"/>
0
 

Author Comment

by:Adapt2NL
ID: 38834973
The grid is essentially bound to a DataSet that is poulated via the MainScreen Object
0
 

Author Comment

by:Adapt2NL
ID: 38834975
Please let me know any other information you would like.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 38835004
I don't see any ToolTip in the XAML...
0
 

Author Comment

by:Adapt2NL
ID: 38835148
Please excuse my ignorance (I am after all new to WPF) but how would I refer to the style for my tooltip?
Tooltip = ..... what do I write between the quotes?
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 38836207
OK, now I see how that was implemented.  The example is a Style, that is either an application-level resource (in App.xaml), or window-specific resource (under Window.Resources element).  

The key to the style is TargetType="{x:Type dg:DataGridRow}", which applies this style to the DataGridRow.

This might be a good reference for WPF styles:

A Guided Tour of WPF – Part 5 (Styles)
http://www.codeproject.com/Articles/18388/A-Guided-Tour-of-WPF-Part-5-Styles
0
 

Author Comment

by:Adapt2NL
ID: 38836458
Thank you I will read the article and revert. I am travelling tomorrow and will be away for a week so please excuse me if there is a delay.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 38836489
I should be here whenever you need more advice.
0
 

Author Comment

by:Adapt2NL
ID: 38879343
Thank you for your assistance, I managed by adding the code without using a style. I will read up on styles:)
0

Featured Post

A new era in Cloud training has arrived.

A day that will go down in Cloud history.. But are you ready for it? Will you accept this Cloud challenge?

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Welcome my friends to the second instalment and follow-up to our Minify and Concatenate Your Scripts and Stylesheets (http://www.experts-exchange.com/Programming/Languages/.NET/ASP.NET/A_4334-Minify-and-Concatenate-Your-Scripts-and-Stylesheets.html)…
After several hours of googling I could not gather any information on this topic. There are several ways of controlling the USB port connected to any storage device. The best example of that is by changing the registry value of "HKEY_LOCAL_MACHINE\S…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…

704 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question