Warum DevExpress GridControl einen leeren Tooltip anzeigen?

Ich erstelle DevExpress GridControl. Hier vollständiger Code von GroupBox und GridControl, weil ich nicht weiß, warum es leerer Tooltip zeigt. Ich versuche, viele Änderungen am Code vorzunehmen, lesen DevExpress Forum, aber es funktioniert nicht.Warum DevExpress GridControl einen leeren Tooltip anzeigen?

<GroupBox Grid.Row="0"> 
         <GroupBox.Header> 
          <TextBlock FontWeight="Bold" 
          Text="GroupBox"/> 
         </GroupBox.Header> 

         <Grid 
         ScrollViewer.CanContentScroll="True" 
         ScrollViewer.HorizontalScrollBarVisibility="Auto" 
         ScrollViewer.VerticalScrollBarVisibility="Auto" 
         > 
          <Grid.RowDefinitions> 
           <RowDefinition Height="*" ></RowDefinition> 
          </Grid.RowDefinitions> 

          <dxg:GridControl Grid.Row="0"          
           x:Name="grUsagePoint" 
           VerticalAlignment="Stretch"          
           HorizontalAlignment="Stretch" 
           dx:ThemeManager.ThemeName="Seven" 

           ScrollViewer.CanContentScroll="True" 
           ScrollViewer.HorizontalScrollBarVisibility="Auto" 
           ScrollViewer.VerticalScrollBarVisibility="Auto"          
           ItemsSource="{Binding Collection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" 
           SelectedItem="{Binding CurrentElement,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"             
           > 

           <dxg:GridControl.View> 
            <!--region #RowCellMenuCustomization--> 
            <dxg:TableView x:Name="view" AutoWidth="True"> 
             <dxg:TableView.RowCellMenuCustomizations> 
              <dxb:BarButtonItem Content="First"           
                ItemClick="CellDataItem_Link_ItemClick" 
                Glyph="First.png" 
                > 
              </dxb:BarButtonItem> 

              <dxb:BarButtonItem Content="Second"           
             ItemClick="CellDataItem_UnLink_ItemClick" 
                Glyph="Second.png" 
                > 
              </dxb:BarButtonItem> 

              <dxb:BarButtonItem Content="Third"           
             ItemClick="CellDataItem_Open_ItemClick" 
                Glyph="Third.png" 
                > 
              </dxb:BarButtonItem> 

              <dxb:BarItemSeparator /> 

              <dxb:BarButtonItem Content="Something"           
             ItemClick="CellDataItem_FindInTree_ItemClick" 
                Glyph="Something.png" 
                > 
              </dxb:BarButtonItem> 

             </dxg:TableView.RowCellMenuCustomizations> 
            </dxg:TableView> 
            <!--endregion #RowCellMenuCustomization--> 
           </dxg:GridControl.View> 

           <dxg:GridControl.Columns> 

            <dxg:GridColumn Header="First column" 
              AllowEditing="False" 
              Width="*"        
              HorizontalHeaderContentAlignment="Stretch" 
              AllowResizing="True" 
              Binding="{Binding First,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}" 

             ></dxg:GridColumn> 
            <dxg:GridColumn Header="Second column" 
             AllowEditing="False"  
              MinWidth="80" 
              Width="Auto" 
              HorizontalHeaderContentAlignment="Stretch" 
              AllowResizing="True" 
              ToolTip="tooltip" 
              Binding="{Binding Second,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}" HeaderToolTip="Second" 
             > 

            </dxg:GridColumn> 
            <dxg:GridColumn Header="Third column" 
              AllowEditing="False" 
              Visible="False" 
              Width="*" 
              HorizontalHeaderContentAlignment="Stretch"             
              AllowResizing="True" 
              ToolTip="tool tip" 
              Binding="{Binding Third,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}" HeaderToolTip="Third" 
             > 
            </dxg:GridColumn> 
            <dxg:GridColumn Header="Fourth column            
              AllowEditing="False" 
              HorizontalHeaderContentAlignment="Center            
              FixedWidth="True"            
              AllowResizing="False" 
              Width="35"  
              ToolTip="tool tip" 
             Binding="{Binding Fourth,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}" HeaderToolTip="Header tooltip" 
             > 

            </dxg:GridColumn> 

            <dxg:GridColumn Header="fifth column" 
             AllowEditing="False" 
             HorizontalHeaderContentAlignment="Center"            
             FixedWidth="True"            
             AllowResizing="False" 
             Width="35" 
             ToolTip="tool tip" 
             Binding="{Binding Fifth,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}" HeaderToolTip="Header tooltip" 
             > 

            </dxg:GridColumn> 


            <dxg:GridColumn 
          Header="sixth column" 
          Binding="{Binding Sixth,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}"  
          ToolTip="tool tip" 
          HorizontalHeaderContentAlignment="Stretch" 
          FixedWidth="False" 
          AllowEditing="False" AllowResizing="True" HeaderToolTip="Header tooltip" 
          ></dxg:GridColumn> 

            <dxg:GridColumn 
          Header="Seventh column" 
          Binding="{Binding Seventh,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}" 
          AllowEditing="False"  
          ToolTip="tool tip" 
          HorizontalHeaderContentAlignment="Stretch" 
          Width="*"                       
          AllowResizing="True" 
          HeaderToolTip="Header tooltip" 

          /> 

           </dxg:GridControl.Columns> 

           <dxg:GridControl.ContextMenu> 
            <ContextMenu DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}"> 
             <MenuItem Header="First" 
             Command="{Binding FirstCommand}"> 
              <MenuItem.Icon> 
               <Image Source="First.png" /> 
              </MenuItem.Icon> 
             </MenuItem> 
             <MenuItem Header="Second" 
             Command="{Binding SecondCommand}"> 
              <MenuItem.Icon> 
               <Image Source="Second.png" /> 
              </MenuItem.Icon> 
             </MenuItem> 
             <Separator /> 
             <MenuItem Header="Third" 
             Command="{Binding ThirdCommand}"> 
              <MenuItem.Icon> 
               <Image Source="Third.png" /> 
              </MenuItem.Icon> 
             </MenuItem> 

             <MenuItem Header="Fourth" 
             Command="{Binding FourthCommand}"> 
              <MenuItem.Icon> 
               <Image Source="Fourth.png" /> 
              </MenuItem.Icon> 
             </MenuItem> 

            </ContextMenu> 
           </dxg:GridControl.ContextMenu> 
           <dxg:GridControl.InputBindings> 
            <MouseBinding MouseAction="LeftDoubleClick" 
             Command="{Binding OpenCommand}"/> 
           </dxg:GridControl.InputBindings> 
          </dxg:GridControl> 
         </Grid> 
        </GroupBox>

Aber es ist sehr seltsam, wenn ich versuche, Tooltip zu sehen: es zeigt leere Zeichenfolge!

Hier das Bild:

Wie so machen, dass der Tooltip den gleichen Wert zeigte, wie in in einem Raster?

Quelle

2017-07-17 Admiral Land

Versuchen Sie, die Tooltip Eigenschaft in der CellStyle der Säule zu setzen:

<dxg:GridColumn Header="Fourth column"            
       AllowEditing="False" 
       HorizontalHeaderContentAlignment="Center"           
       FixedWidth="True"            
       AllowResizing="False" 
       Width="35"  
       Binding="{Binding Fourth,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}"> 
    <dxg:GridColumn.CellStyle> 
     <Style BasedOn="{StaticResource {dxgt:GridRowThemeKey ResourceKey=CellStyle}}" TargetType="dxg:GridCellContentPresenter"> 
      <Setter Property="ToolTip" Value="tool tip"/> 
     </Style> 
    </dxg:GridColumn.CellStyle> 
</dxg:GridColumn>

Quelle

2017-07-17 09:15:26 mm8

Warum DevExpress GridControl einen leeren Tooltip anzeigen?

Antwort

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