Questions on UI for WPF Forum

3 answers

271 views

Hello,

I need to change visual style of line chart. I want to change size and fill of circle points, lines between points may remain unchanged.

I'm not sure what control I should template, because changing template of whole telerik:Line destroys all the lines between points and also Y positions of points are wrong.

Some example, like in your Demo application (Custom Bar Template) would be great.

Thank you!

Chart

answered on 10 Dec 2009

1 answer

171 views

ActionOnLostFocus="CommitEdit" Does Not Work When Cell EditTemplate is Used

Hi Telerik

In the following xaml I have set up a RadGridView with two columns:

    
                   <t:RadGridView ItemsSource="{Binding Persons}"  ActionOnLostFocus="CommitEdit" AutoGenerateColumns="False" > 
        
                        <t:RadGridView.Columns> 
        
                            <!-- Auto column --> 
        
                            <t:GridViewDataColumn DataMemberBinding="{Binding Path=ID}"  /> 
        
                            <!-- Manual column --> 
        
                            <t:GridViewDataColumn DataMemberBinding="{Binding Name}"> 
        
                                <t:GridViewDataColumn.CellTemplate> 
        
                                    <DataTemplate> 
        
                                        <TextBlock Text="{Binding Name}" /> 
        
                                    </DataTemplate> 
        
                                </t:GridViewDataColumn.CellTemplate> 
        
                                <t:GridViewDataColumn.CellEditTemplate> 
        
                                    <DataTemplate> 
        
                                        <TextBox Text="{Binding Name,Mode=TwoWay}" /> 
        
                                    </DataTemplate> 
        
                                </t:GridViewDataColumn.CellEditTemplate> 
        
                            </t:GridViewDataColumn> 
        
                        </t:RadGridView.Columns> 
        
                    </t:RadGridView>

This xaml was placed in a window with the following code behind:

    
            using System.Collections.ObjectModel; 
        
            using System.Windows; 
        
            namespace WpfApplication2 
        
            { 
        
                /// <summary> 
        
                /// Interaction logic for MainWindow.xaml 
        
                /// </summary> 
        
                public partial class MainWindow : Window 
        
                { 
        
                    public MainWindow()        { 
        
                        InitializeComponent(); 
        
                        this.DataContext = this; 
        
                    } 
        
                    public ObservableCollection<Employee> Persons 
        
                    { get { return EmployeeService.GetEmployees(); } } 
        
                } 
        
                public class Employee    { 
        
                    public int ID { get; set; } 
        
                    public string Name { get; set; } 
        
                } 
        
                public class EmployeeService    { 
        
                    public static ObservableCollection<Employee> GetEmployees() 
        
                    { 
        
                        ObservableCollection<Employee> employees = new ObservableCollection<Employee>(); 
        
                        Employee employee = new Employee(); 
        
                        employee.Name = "Maria"; 
        
                        employee.ID = 24890; 
        
                        employees.Add(employee); 
        
                        employee = new Employee(); 
        
                        employee.Name = "Ana"; 
        
                        employee.ID = 23890; 
        
                        employees.Add(employee); 
        
                        employee = new Employee(); 
        
                        employee.Name = "Antonio"; 
        
                        employee.ID = 24890; 
        
                        employees.Add(employee); 
        
                        employee = new Employee(); 
        
                        return employees; 
        
                    } 
        
                } 
        
            }

Now if you run this code you will notice that the two DataGrid columns behave differently when you are updating them. As I understand, when ActionOnLostFocus is set to "CommitEdit" the cell being edited should save its new value when it looses focus. The cells in the first column behave in this fashion, however those in the second column do not - Each reverts to its old value whenever it looses focus.

Why is this? How do I change the behavior of the cells in the second column so that each cell saves its new value when focus is transfered elsewhere?

Cheers

Bob

GridView

answered on 09 Dec 2009

2 answers

213 views

Deleting column from WPF datagrid associated with dataset

When I update a field in a WPF datagrid that's associated with a dataset the corresponding field in the underlying datatable is also modified after I issue a commitedit.

When I delete a column in the grid the corresponding column in the datatable is still present. Am I responsible for deleting the datatable column or am I doing something wrong?

GridView

answered on 09 Dec 2009

4 answers

100 views

Export when grouping problems

Hello,
I have a problem exporting to a text file while grouping the data.

    
            <!-- Window1.xaml --> 
        
            <Window x:Class="WpfTelerikRadGridViewTest.Window1" 
        
                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="Window1" Width="800" Height="600" > 
        
                <Grid> 
        
                    <Grid.RowDefinitions> 
        
                        <RowDefinition /> 
        
                        <RowDefinition Height="Auto" /> 
        
                    </Grid.RowDefinitions> 
        
                    <telerik:RadGridView Name="radGridView1" ItemsSource="{Binding}" /> 
        
                    <Button Grid.Row="1" Click="ButtonBase_OnClick">Save</Button> 
        
                </Grid> 
        
            </Window>

    
            // Window1.xaml.cs  
        
            public partial class Window1  
        
            {  
        
                public Window1()  
        
                {  
        
                    InitializeComponent();  
        
                    var list = new ObservableCollection<string>();  
        
                    list.Add("HELLO1");  
        
                    list.Add("HELLO2");  
        
                    list.Add("HELLO3");  
        
                    list.Add("HELLO4");  
        
                    list.Add("HELLO5");  
        
                    DataContext = list;  
        
                }  
        
                private void ButtonBase_OnClick(object sender, RoutedEventArgs e)  
        
                {  
        
                    var s = radGridView1.ToText();  
        
                }  
        
            }

When i press the save button the variable 's' gets the _correct_ value:
"\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\nHELLO4\r\nHELLO5\r\n"

When i press the save button while grouping the column i get the following value on 's':
"\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\nHELLO4\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\nHELLO4\r\nHELLO5\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\nHELLO4\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\n\r\nHELLO1\r\n\r\nHELLO1\r\nHELLO2\r\nHELLO3\r\nHELLO4\r\nHELLO5\r\n"

This means that i cant export a grid if the user is grouping. I thought that it would generate a sorted grid. This behavior also applies to ToHtml.

GridView

answered on 09 Dec 2009

2 answers

122 views

GridView Header text wrapping

how can i make the Text inside the GridViewDataColumn.Header wrap?

i think something can be done with the GridViewHeaderCell but i didn't managed to make it work

GridView

answered on 09 Dec 2009

5 answers

144 views

RadGrid - Hierarchical View - Column Alignments, Sorting, Filtering, etc

Hi everybody,

I am trying to set up RadGridView as a multi-column tree-view for a self-referencing scenario. I need to make grid columns to be aligned for all the child and parent rows. So if I drag a column gridline then I would expect the gridline to stay straight across all the rows, both parent and child. We are talking about the same column and I need it to behave like one. How can I do this?
Also, when I set frozen columns then child rows would keep sliding past the freeze line (I guess this is part of the same task: treat parent and child columns with the same name as the same visual column).

The final task is when I can get this 'same column' behavior then I need to be able to sort, filter, etc, i.e. do common grid operations.
(Note: I can sort on different columns in the 'SelfReference' example in the Examples_WPF.CS demo but the result of sorting does make much sense when you expand child rows).

Has anybody been able to address this task before? Could you please share your experience/knowledge?

Regards,
g8r.

GridView

answered on 09 Dec 2009

9 answers

458 views

Footer Sum - No method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied arguments.

Hi,

I've embedded a fairly simple example of an issue we have in the greater solution.

The Context:
Using a datatable as the source.
Adding a summary row for Hours (Int32)
Get the error:No method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied arguments.

    
            <Window x:Class="Window1"    
        
                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"    
        
                xmlns:telerikdata="clr-namespace:Telerik.Windows.Data;assembly=Telerik.Windows.Data" 
        
                Title="Window1" WindowState="Maximized">  
        
                <Grid> 
        
                    <telerik:RadGridView      
        
                                    AutoGenerateColumns="False"    
        
                                    HorizontalAlignment="Right"      
        
                                    IsFilteringAllowed="False"    
        
                                    CanUserFreezeColumns="False"      
        
                                    CanUserReorderColumns="False"      
        
                                    IsEnabled="True"    
        
                                    ColumnsWidthMode="Auto"    
        
                                    ShowColumnFooters="True" 
        
                                    CanUserSortColumns="False"                     
        
                                    ShowGroupPanel="False"    
        
                                    ItemsSource="{Binding Tables[Labour.EmployeeLeave]}"    
        
                                    > 
        
                        <telerik:RadGridView.Columns> 
        
                            <telerik:GridViewComboBoxColumn      
        
                                            Header="Employee"      
        
                                            DataMemberBinding="{Binding [EmpNum], Mode=TwoWay}"    
        
                                            SelectedValueMemberPath="EmpNum"    
        
                                            DisplayMemberPath="Fullname"    
        
                                            ItemsSource="{Binding}"      
        
                                            DataContext="{Binding Tables[Labour.Employee]}"/>  
        
                            <telerik:GridViewDataColumn Header="Leave Type" UniqueName="LeaveCode" /> 
        
                            <telerik:GridViewDataColumn Header="Date From" UniqueName="DateFrom" /> 
        
                            <telerik:GridViewDataColumn Header="Date To" UniqueName="DateTo" /> 
        
                            <telerik:GridViewDataColumn   
        
                                Header="Hours"   
        
                                DataMemberBinding="{Binding [Hours], Mode=TwoWay}" > 
        
                                <telerik:GridViewDataColumn.AggregateFunctions> 
        
                                    <telerikdata:SumFunction Caption="Total: " SourceField="Hours" /> 
        
                                </telerik:GridViewDataColumn.AggregateFunctions> 
        
                            </telerik:GridViewDataColumn> 
        
                            <telerik:GridViewDataColumn Header="Pay In Advance" UniqueName="PayInAdvance"/>  
        
                            <telerik:GridViewDataColumn Header="Comments" UniqueName="Comments" /> 
        
                            <telerik:GridViewDataColumn Header="Total Made" UniqueName="TotalMade" /> 
        
                        </telerik:RadGridView.Columns> 
        
                    </telerik:RadGridView> 
        
                </Grid> 
        
            </Window>

    
            Imports System.Data  
        
            Class Window1  
        
                Public Sub New()  
        
                    InitializeComponent()  
        
                    Dim ds As New DataSet  
        
                    Dim dt As New DataTable("Labour.Employee")  
        
                    Me.BuildEmployeesTable(dt)  
        
                    ds.Tables.Add(dt)  
        
                    dt = New DataTable("Labour.EmployeeLeave")  
        
                    Me.BuildEmployeeLeaveTable(dt)  
        
                    ds.Tables.Add(dt)  
        
                    Me.DataContext = ds  
        
                End Sub 
        
                Private Sub BuildEmployeesTable(ByVal dt As DataTable)  
        
                    dt.Columns.Add("EmpNum", GetType(System.Int32))  
        
                    dt.Columns.Add("Firstname", GetType(System.String))  
        
                    dt.Columns.Add("Surname", GetType(System.String))  
        
                    dt.Columns.Add("Fullname", GetType(System.String), "Firstname+' '+Surname")  
        
                    Me.AdddEmployeesRow(dt, 1, "Joe", "Blogs")  
        
                    Me.AdddEmployeesRow(dt, 2, "John", "Doe")  
        
                    Me.AdddEmployeesRow(dt, 3, "Mary", "May")  
        
                End Sub 
        
                Private Sub BuildEmployeeLeaveTable(ByVal dt As DataTable)  
        
                    dt.Columns.Add("EmpNum", GetType(System.Int32))  
        
                    dt.Columns.Add("LeaveCode", GetType(System.String))  
        
                    dt.Columns.Add("DateFrom", GetType(System.DateTime))  
        
                    dt.Columns.Add("DateTo", GetType(System.DateTime))  
        
                    dt.Columns.Add("Hours", GetType(System.Int32))  
        
                    dt.Columns.Add("PayInAdvance", GetType(System.Boolean))  
        
                    dt.Columns.Add("Comments", GetType(System.String))  
        
                    dt.Columns.Add("TotalMade", GetType(String), "Comments+Hours")  
        
                    Me.AdddEmployeeLeaveRow(dt, 1, "sss", Now, Now, 55, True, "comment")  
        
                    Me.AdddEmployeeLeaveRow(dt, 2, "sss", Now, Now, 22, True, "comment")  
        
                    Me.AdddEmployeeLeaveRow(dt, 3, "sss", Now, Now, 33, True, "comment")  
        
                End Sub 
        
                Private Sub AdddEmployeesRow(ByVal dt As DataTable, ByVal id As Integer, ByVal fname As String, ByVal lname As String)  
        
                    Dim dr As DataRow = dt.NewRow()  
        
                    dr("EmpNum") = id  
        
                    dr("Firstname") = fname  
        
                    dr("Surname") = lname  
        
                    dt.Rows.Add(dr)  
        
                End Sub 
        
                Private Sub AdddEmployeeLeaveRow(ByVal dt As DataTable, ByVal id As Integer, ByVal LeaveCode As String, ByVal DateFrom As DateTime, ByVal DateTo As DateTime, ByVal Hours As Integer, ByVal PayInAdvance As Boolean, ByVal Comments As String)  
        
                    Dim dr As DataRow = dt.NewRow()  
        
                    dr("EmpNum") = id  
        
                    dr("LeaveCode") = LeaveCode  
        
                    dr("DateFrom") = DateFrom  
        
                    dr("DateTo") = DateTo  
        
                    dr("Hours") = Hours  
        
                    dr("PayInAdvance") = PayInAdvance  
        
                    dr("Comments") = Comments  
        
                    dt.Rows.Add(dr)  
        
                End Sub 
        
            End Class

The last issue I had with datasets had a fairly simple fix. Hope this is the same.

Regards,
Nic Roche

GridView

answered on 09 Dec 2009

4 answers

133 views

RadTreeView & RadDragAndDropManager

Hi,

I'm using a RadTreeView with IsDragDropEnabled ="True" and need to limit dragging and dropping for certain items. Tried to attach to

                                RadDragAndDropManager.AddDragQueryHandler(...);         
                        RadDragAndDropManager.AddDragInfoHandler(...);         
                        RadDragAndDropManager.AddDropQueryHandler(..);         
                        RadDragAndDropManager.AddDropInfoHandler(...);         
                     

and manipulate with e.QueryResult but it does not take any effect. All the items are allowed to be dragged and dropped anywhere inside the treeview.

I followed the sample and it does work for the GridView but doesn't on a TreeView.

Thanks,

Ruben.

TreeView

answered on 08 Dec 2009

2 answers

125 views

Gridview and Multi Column Combo

Hi..
1. Do have any examples of Multi Column Combo box in a GridView?
2. How do 'select' or 'set focus' to the combo box so it is visible in a row?
3. How can I pull multiple values from the combo box and populate other columns in the selected Row with the values?

thanks in advance

GridView

answered on 08 Dec 2009

1 answer

72 views

Differences between Q2 and Q3 for selecting rows.

Hi

I have noticed that there is a difference between Q2 and Q3 on selecting a row;

In the Q2 release, the row becomes selected

when the user clicks the leftmost bar which does not have any data
when the user clicks on one of the cells in that row

In the Q3 release, the row only becomes selected when the user clicks on one of the cells in that row.

This means that the user can no longer drag data from the leftmost column which is probably the most intuitive way to do it. Is there any way to recreate this behavior in Q3?

GridView

answered on 08 Dec 2009