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How to add new row with Tab key

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GridView
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Tai
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Tai asked on 17 Sep 2010, 09:14 AM
Hi

how can i make a new row for the radgridview by pressing the Tab key if the cursor is at the last cell of the grid(last row, last column) instead of pressing the Insert key?
i try to look at the document or the Search function in the forum but only see sample for the WinForm

thank you

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Maya
Telerik team
answered on 17 Sep 2010, 09:20 AM
Hello Tai,

You may handle the KeyDown event of the grid as follows:
private void playersGrid_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Tab)
    {
        var grid = sender as RadGridView;
        Player currentItem = grid.CurrentItem as Player;
        if ((currentItem != null))
        {
            grid.BeginInsert();
            grid.CurrentColumn = grid.Columns[0];
        }
        else
        {
            e.Handled = true;
        }
    }
}

 
Sincerely yours,
Maya
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Tai
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answered on 18 Sep 2010, 09:17 AM
Hi Maya,

the sample code doesn't work well.
1. if my page only have one GridView(No Other UI controls such as TextBox), then pressing tab at the last cell still keeps the tab at that last cell. So no new row will appear
2. if i have other UI control and the GridView, then the tab works but the code becomes very buggy. The validation of the cell always fires whenever i press tab. And press Insert will make the new row appear at top , not last cell. Sometimes I will have the error which tells that the operation is in process during press tab at the last cell.

plz help

thank you
0
Maya
Telerik team
answered on 20 Sep 2010, 07:30 AM
Hi Tai,

In order to provide you with an appropriate solution, I would need more details about your project and its settings. How exactly are you defining your grid in the first and second scenarios? 
I am sending you the sample project illustrating the solution proposed above, so that you ca use it as a reference. You may feel free to change it in the way you want and share more information if there is any misunderstandings according to your requitements.
 

Greetings,
Maya
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Tai
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answered on 20 Sep 2010, 09:19 PM
Hi Maya,

I looked at your project and saw there weren't much different with mine excepting some more properties for the gridview. Yours is working but mine isn't. Not sure why.

this is the first case code. Pressing tab and it just stays at the last cells.(the second case, the code is more complex. If i know what wrong with the first case, i will try it with the second case before asking you again). Thank you for helping

<Grid x:Name="LayoutRoot" Background="White">
        <Grid.RowDefinitions>
            <RowDefinition Height="125*" />
            <RowDefinition Height="53*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="254*" />
            <ColumnDefinition Width="64*" />
        </Grid.ColumnDefinitions>
        <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my:Company, CreateList=true}" Height="0" LoadedData="companyDomainDataSource_LoadedData" Name="companyDomainDataSource" QueryName="GetCompaniesQuery" Width="0" Margin="0,0,254,125">
            <riaControls:DomainDataSource.DomainContext>
                <my1:CompanyContext />
            </riaControls:DomainDataSource.DomainContext>
        </riaControls:DomainDataSource>
        <telerik:RadGridView  KeyDown="companyRadGridView_KeyDown"
                                ItemsSource="{Binding ElementName=companyDomainDataSource, Path=Data}" Name="companyRadGridView"
                             AutoGenerateColumns="False" ShowGroupPanel="False" 
                             DataLoadMode="Asynchronous"
                             RowEditEnded="companyRadGridView_RowEditEnded" 
                             AddingNewDataItem="companyRadGridView_AddingNewDataItem"
                            
                             IsSynchronizedWithCurrentItem="false"
                             Deleted="companyRadGridView_Deleted" Height="125" VerticalAlignment="Top" Grid.ColumnSpan="2">
            <telerik:RadGridView.Columns>
                 
                <telerik:GridViewDataColumn Header="Company Code" DataMemberBinding="{Binding CompanyCode}" />
                <telerik:GridViewDataColumn Header="Company Name" DataMemberBinding="{Binding CompanyName}" />
 
                
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
        <telerik:RadButton Content="Setup" Margin="14,15,0,0" Name="setBtn" Click="ModalCompanySetup_Click" Grid.Column="1" Height="26" VerticalAlignment="Top" HorizontalAlignment="Left" Width="54" Grid.Row="1" />
    </Grid>


This is my code behind.
 
public partial class CompanyGridView : RadWindow
   {
       public CompanyGridView()
       {
           InitializeComponent();
       }
 
       private void companyDomainDataSource_LoadedData(object sender, LoadedDataEventArgs e)
       {
 
           if (e.HasError)
           {
               System.Windows.MessageBox.Show(e.Error.ToString(), "Load Error", System.Windows.MessageBoxButton.OK);
               e.MarkErrorAsHandled();
           }
       }
 
       private void ModalCompanySetup_Click(object sender, RoutedEventArgs e)
       {
           CompanySetupWindow companySetupWindow = new CompanySetupWindow(this.companyRadGridView.SelectedItem, (this.companyDomainDataSource.DomainContext as CompanyContext));
           companySetupWindow.WindowStartupLocation = Telerik.Windows.Controls.WindowStartupLocation.CenterOwner;
           companySetupWindow.ShowDialog();
            
       }
 
       private void companyRadGridView_RowEditEnded(object sender, GridViewRowEditEndedEventArgs e)
       {
           this.companyDomainDataSource.DomainContext.SubmitChanges();
       }
 
       private void companyRadGridView_Deleted(object sender, GridViewDeletedEventArgs e)
       {
           this.companyDomainDataSource.DomainContext.SubmitChanges();
       }
 
       private void companyRadGridView_AddingNewDataItem(object sender, Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e)
       {
           this.companyRadGridView.CurrentColumn = this.companyRadGridView.Columns[0];
       }
 
       
       private void companyRadGridView_KeyDown(object sender, KeyEventArgs e)
       {
           if (e.Key == Key.Tab)
           {
               var grid = sender as RadGridView;
               Company currentItem = grid.CurrentItem as Company;
               if ((currentItem != null))
               {
                   grid.BeginInsert();
                   grid.CurrentColumn = grid.Columns[0];
               }
               else
               {
                   e.Handled = true;
               }
           }
       }
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Maya
Telerik team
answered on 21 Sep 2010, 07:17 AM
Hello Tai,

Basically, In order to insert a new item in the grid, by using BeginInsert() method or by setting ShowInsertRow to "True", you need to have a default constructor in the definition of the class filling up the data of the grid. 
Furthermore, as you are using RIA Services and DomainDataSource, the add/delete functionality may be not available depending on your data source you are using. You may take a look at this forum thread for more information on the way to overcome that and implement the desired features.
 

Kind regards,
Maya
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Tai
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answered on 21 Sep 2010, 07:52 PM
Hi Maya,

I saw that thread a long time ago . However, the sample project of that post won't have the built-in feature "sorting, grouping,.." of the radgridview(if i click on one of the header column of the gridview, I will get an error) . I want to have those features. But not sure how to implement it to work with your radgridview so i decide to use the DomainDatasource with the radgridview which will take advantage of the built-in sorting, grouping,...

can you show me a sample which use domaindatasource + entity framework + enabling tab key in order to insert a new row?

thank you
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Maya
Telerik team
answered on 24 Sep 2010, 02:52 PM
Hello Tai,

You can apply the logic for handling the KeyDown event in the sample project attached in the forum thread mentioned above. The only thing you need to implement in this application is the ICollection CopyTo() method:

/// <summary>Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"/>
/// is read-only. </exception>
void ICollection<TEntity>.CopyTo(TEntity[] array, int arrayIndex)
{
    this.entities.ToArray().CopyTo(array, arrayIndex);
}

It is in the EntityCollectioViewBase<TEntity> class. Thus you will be able to add and remove items as well as to sort the grid.

 

All the best,
Maya
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danparker276
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answered on 21 Jan 2012, 04:01 AM
When I press the Tab key, it only fires the grid event 'KeyDown' when it's the last cell in the last row.  If I press a alpha/number in that same cell it will fire the event, but not the tab key.  Any suggestions?
EDIT: Actually I guess I need to use that CommandOverride ( I for get the name) because you take control of the tab key to move to the next cell.
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Maya
Telerik team
answered on 21 Jan 2012, 08:14 AM
Hello,

 Indeed, that would be the expected behavior for handling Tab key as RadGridView performs its own navigation logic for it. In case you want to predefine it, you can create one of your own by developing a custom keyboard command provider. Please refer to our online documentation and blog posts for a reference.
Is that the behavior you are looking for ?

Kind regards,
Maya
the Telerik team

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