Questions on UI for WPF Forum

6 answers

278 views

Infinite loop 2 RadGridViews while row validation

Hi,

I have 2 RadGridView's in a window both of which perform row level validation. I am able to raise an exception" "An infinite loop appears to have resulted from cross-dependent views." when both grids are validating.

Ive created a very basic test app and here are the steps:

Top Grid. Click "Click here to add a new item" to add a new row.
Bottom Grid do the same.

The Top grid will show the row as invalid. and the botton grid will have a new row
Click in the bottom grid's new row (the Initial value 2 column) and it will crash

Here is the Xaml

<Window x:Class="TestMultipleRadGrids.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

Title="MainWindow" Height="350" Width="525">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="*"/>

</Grid.RowDefinitions>

<telerik:RadGridView Grid.Row="0"

x:Name="_rad1"

ValidatesOnDataErrors="InEditMode"

ShowGroupPanel="False"

AutoGenerateColumns="False"

CanUserReorderColumns="True"

CanUserInsertRows="True"

RowValidating="_rad1_RowValidating"

ShowInsertRow="True">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name1" />

<telerik:GridViewDataColumn Header="Initial Value1" DataMemberBinding="{Binding InitialValue1, Mode=TwoWay}"/>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

<telerik:RadGridView Grid.Row="1"

x:Name="_rad2"

ShowGroupPanel="False"

ValidatesOnDataErrors="InEditMode"

AutoGenerateColumns="False"

CanUserReorderColumns="True"

CanUserInsertRows="true"

RowValidating="_rad2_RowValidating"

ShowInsertRow="True">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name2"/>

<telerik:GridViewDataColumn Header="Initial Value2" DataMemberBinding="{Binding InitialValue2, Mode=TwoWay}" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</Window>

Here is the code behind:

using System.Windows;

using Telerik.Windows.Controls;

namespace TestMultipleRadGrids

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

}

private void _rad1_RowValidating(object sender, Telerik.Windows.Controls.GridViewRowValidatingEventArgs e)

{

GridViewCellValidationResult validationResult = new GridViewCellValidationResult();

validationResult.PropertyName = "InitialValue1";

validationResult.ErrorMessage = "Error";

e.ValidationResults.Add(validationResult);

e.IsValid = false;

}

private void _rad2_RowValidating(object sender, Telerik.Windows.Controls.GridViewRowValidatingEventArgs e)

{

_rad1.Focus();

GridViewCellValidationResult validationResult = new GridViewCellValidationResult();

validationResult.PropertyName = "InitialValue2";

validationResult.ErrorMessage = "Error";

e.ValidationResults.Add(validationResult);

e.IsValid = false;

}

Any help would be greatly appreciated.

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                                  AllowDrop="True" CanUserDeleteRows="True" CanUserInsertRows="True" CanUserSelect="True" CanUserSortGroups="True"
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