Rank 1
Iron
In my `telerik:RadGridView`, I have configured a `CellValidating="RadGridView_CellValidating"` callback. It successfully catches a validation error, which then invokes this code:
e.IsValid = false;
e.ErrorMessage = "Enter a valid URL with 'https://' or 'http://'";The cell does properly receive a red border, and what looks like a tool-tip notation in the top right corner. However, unfortunately, I am unable to see the tool-tip, regardless if I hover or click on the tool-tip. What are perhaps the top three to five reasons this might be happening?
It is specifically the "Documentation" column above, which is a `GridViewHyperlinkColumn`, which is failing validation...with no tool-tip showing. To be clear, actually none of the columns have a working or "showable" tool-tip. Even so, here is the code specifically for my "Documentation" column:
<telerik:GridViewHyperlinkColumn
IsReadOnly="{Binding IsEditModeWithPermissions, Converter={StaticResource InverseBooleanConverter}}"
CellStyle="{StaticResource GridViewCellStyleStretch}" IsCustomSortingEnabled="False"
ValidatesOnDataErrors="InViewMode"
UniqueName="Documentation"
MinWidth="80" MaxWidth="350" Width="150"
DataMemberBinding="{Binding Documentation}"
Name="DocumentationColumn" Header="Documentation">
<telerik:GridViewHyperlinkColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding DocumentationFormatted, StringFormat='{}{0}'}"/>
</DataTemplate>
</telerik:GridViewHyperlinkColumn.CellTemplate>
<telerik:GridViewHyperlinkColumn.CellEditTemplate>
<DataTemplate>
<telerik:RadComboBox x:Name="DocumentationBox"
Text="{Binding Documentation, Mode=TwoWay}" KeyDown="RadComboBox_PreviewKeyDown"
IsTextSearchEnabled="True" TextSearchMode="StartsWith" OpenDropDownOnFocus="True"
StaysOpenOnEdit="False" Loaded="RadComboBox_Loaded" IsEditable="True" >
<telerik:RadComboBox.Resources>
<Style TargetType="TextBox">
<Setter Property="MaxLength" Value="{Binding DocumentationColumnWidth}" />
</Style>
</telerik:RadComboBox.Resources>
</telerik:RadComboBox>
</DataTemplate>
</telerik:GridViewHyperlinkColumn.CellEditTemplate>
</telerik:GridViewHyperlinkColumn>And here is the RadGridView initial declaration:
<telerik:RadGridView Grid.Row="1"
CellValidating="RadGridView_CellValidating"
BorderThickness="{Binding GridBorderThickness}"
SelectedItem="{Binding SelectedLineItem, Mode=TwoWay}" Pasting="UxGrid_OnPasting"
SelectionChanged="UxGrid_OnSelectionChanged" CopyingCellClipboardContent="UxGrid_OnCopyingCellClipboardContent"
RowIndicatorVisibility="Visible"
ValidatesOnDataErrors="InViewMode"
EditTriggers="CellClick"
ActionOnLostFocus="CommitEdit" Name="uxGrid"
PreparingCellForEdit="uxGrid_PreparingCellForEdit" Deleted="UxGrid_OnDeleted"
CellEditEnded="uxGrid_CellEditEnded"
KeyDown="GridKeyDown"
ScrollMode="Deferred"
IsReadOnly="{Binding IsGridEditable, Converter={StaticResource InverseBooleanConverter}}"
CanUserDeleteRows="{Binding CanEditNotReleased}" CanUserInsertRows="False"
AreRowDetailsFrozen="True" EnableColumnVirtualization="False"
RowDetailsVisibilityMode="{Binding RowDetailsVisibility}"
DataLoaded="UxGrid_OnDataLoaded"
RowEditEnded="RadGridViewRowEditEnded" BeginningEdit="RadGridViewBeginningEdit"
AlternationCount="2" AutoGenerateColumns="False"
ItemsSource="{Binding LineItemsView, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="uxGrid_SourceUpdated_1"
Loaded="uxGrid_Loaded"
LoadingRowDetails="UxGrid_OnLoadingRowDetails"
ColumnWidthChanged="GridViewDataControl_OnColumnWidthChanged"
DataContext="{Binding}"
ColumnReordering="uxGrid_ColumnReordering"
CanUserSortColumns="{Binding IsEditMode, Converter={StaticResource InverseBooleanConverter}}"
IsFilteringAllowed="{Binding IsEditMode, Converter={StaticResource InverseBooleanConverter}}">