Questions on UI for WinForms Forum

4 answers

657 views

BeginEditMode, Cell Editing and Tab key problems

Telerik.Win.Control.UI.dll version is "2009.3.9.1203"

Hi,
I am running into several behavior problems with the RadGridView control.
1) If I set the BeginEditMode to "BeginEditOnF2", the user is still able to get into edit mode by double-clicking on a cell - not what is expected!
2) once the grid is in edit mode, the user can click on another cell to put it in edit mode regardless of the BeginEditMode setting
3) worst yet, if the user is editing a cell and hit the tab (or shift-tab), the new cell goes into edit mode but the changes to the original cell are not submitted to the bound dataset even though the CellEndEdit event is called (where I update the dataset). Code is below...

Any help would be greatly appreciated...
Ali M.

In the code below, I was forced to ignore the BeginEditMode property because it is not working and instead implemented a CellDoubleClick event handler that puts the cell into edit mode. If the user makes a change and hits the Enter key, then changes are submitted to the db in the CellEndEdit event handler. But, if the user tabs to another cell, the cell is put into Edit mode but the changes he/she made in the previous cell are not submitted...
My preferred solution would be to enforce the F2-only edit mode through the BeginEditMode property...

    
            Public Class RadForm1 
        
                Private _cellModifyBegin As Boolean 
        
                Private _currentEditCell As Integer 
        
                Private Sub RadForm1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
        
                    _cellModifyBegin = False 
        
                    Try 
        
                        grdCustomers.EnterKeyMode = Telerik.WinControls.UI.RadGridViewEnterKeyMode.None 
        
                        Me.CustomerTableAdapter.Fill(Me.CustomerApps.Customer) 
        
                    Catch ex1 As System.Exception 
        
                        Debug.WriteLine(String.Format("Failed in frmMain2.frmMain2_Load - Exception: {0}", ex1.ToString())) 
        
                        My.Application.Log.WriteException(ex1) 
        
                        MessageBox.Show(String.Format("An error has ocurred. Message : {0}", ex1.Message())) 
        
                    Finally 
        
                        Debug.WriteLine("End ---> frmMain2.frmMain2_Load") 
        
                        My.Application.Log.WriteEntry(String.Format("End --->     {0:00}:{1:00}:{2:00}:{3:0000}   frmMain2.frmMain2_Load", Now.Hour, Now.Minute, Now.Second, Now.Millisecond)) 
        
                    End Try 
        
                End Sub 
        
                Private Sub grdCustomers_CellBeginEdit(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCellCancelEventArgs) Handles grdCustomers.CellBeginEdit 
        
                    Debug.Print(String.Format("grdCustomers_CellBeginEdit.  RowIndex={0}, CellIndex={1}", e.RowIndex, e.ColumnIndex)) 
        
                    If _currentEditCell <> e.ColumnIndex Then 
        
                        ' this cell got into Edit mode due to user tabbing away from a previous cell edit 
        
                        e.Cancel = True 
        
                        Return 
        
                    End If 
        
                    _cellModifyBegin = True 
        
                End Sub 
        
                Private Sub grdCustomers_CellDoubleClick(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCellEventArgs) Handles grdCustomers.CellDoubleClick 
        
                    Debug.Print(String.Format("grdCustomers_CellDoubleClick.  RowIndex={0}, CellIndex={1}", e.RowIndex, e.ColumnIndex)) 
        
                    _currentEditCell = e.ColumnIndex 
        
                    e.Row.Cells(e.ColumnIndex).BeginEdit() 
        
                End Sub 
        
                Private Sub grdCustomers_CellEndEdit(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCellEventArgs) Handles grdCustomers.CellEndEdit 
        
                    If grdCustomers.ActiveEditor.IsModified Then 
        
                        Debug.Print(String.Format("grdCustomers_CellEndEdit.  RowIndex={0}, CellIndex={1}", e.RowIndex, e.ColumnIndex)) 
        
                        CustomerTableAdapter.Update(CustomerApps.Customer) 
        
                        grdCustomers.Update() 
        
                    End If 
        
                    _cellModifyBegin = False 
        
                End Sub 
        
            End Class

GridView

answered on 05 Nov 2010

11 answers

336 views

[Solved] Problem with pinned column if there are custom GridDataCellElements.

Hi!

VERSION: 2010 Q2 SP2

This is my simple application:

EditableCheckBoxCellElement:

namespace GridViewUnboundMode

{

public class EditableCheckBoxCellElement : GridDataCellElement

{

private RadCheckBoxElement _chk;

private RadTextBoxElement _txtBox;

private CellValue _cellValue;

public EditableCheckBoxCellElement(GridViewColumn column, GridRowElement row)

: base(column, row)

{

}

protected override void CreateChildElements()

{

base.CreateChildElements();

_chk = new RadCheckBoxElement();

_chk.Margin = new Padding(2, 2, 2, 2);

_chk.MinSize = new Size(10, 10);

_chk.Text = string.Empty;

_chk.ToggleState = Telerik.WinControls.Enumerations.ToggleState.Off;

_chk.ToggleStateChanged += new StateChangedEventHandler(_chk_ToggleStateChanged);

_txtBox = new RadTextBoxElement();

_txtBox.Margin = new Padding(2, 2, 2, 2);

_txtBox.MinSize = new Size(10, 10);

_txtBox.Text = "sss";

this.Children.Add(_chk);

this.Children.Add(_txtBox);

}

void _chk_ToggleStateChanged(object sender, StateChangedEventArgs args)

{

if (_chk.ToggleState == Telerik.WinControls.Enumerations.ToggleState.On)

{ _cellValue.IsAssigned = true; }

else if (_chk.ToggleState == Telerik.WinControls.Enumerations.ToggleState.Off)

{ _cellValue.IsAssigned = false; }

}

protected override SizeF ArrangeOverride(SizeF finalSize)

{

if (this.Children.Count == 2)

{

this.Children[0].Arrange(new RectangleF(2, 2, 10, 10));

this.Children[1].Arrange(new RectangleF(21, 2, finalSize.Width - 28 - 10, 15));

}

return finalSize;

}

public override object Value

{

get { return _cellValue; }

set

{

_cellValue = value as CellValue;

if (_cellValue != null)

{

_txtBox.Text = _cellValue.Text;

this.IsChecked = _cellValue.IsAssigned;

}

public bool IsChecked

{

get

{

return _cellValue.IsAssigned;

}

set

{

if (value)

{ _chk.ToggleState = Telerik.WinControls.Enumerations.ToggleState.On; }

else

{ _chk.ToggleState = Telerik.WinControls.Enumerations.ToggleState.Off; }

_cellValue.IsAssigned = value;

}

EditableCheckBoxColumn:

namespace GridViewUnboundMode

{

public class EditableCheckBoxColumn : GridViewDataColumn

{

public EditableCheckBoxColumn(): base()

{

}

public override Type GetCellType(GridViewRowInfo row)

{

if (row is GridViewDataRowInfo)

{

return typeof(EditableCheckBoxCellElement);

}

return base.GetCellType(row);

}

CellValue:

namespace GridViewUnboundMode

{

public class CellValue

{

public string Text { get; set; }

public bool IsAssigned { get; set; }

}

Form1:

namespace GridViewUnboundMode

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

radGridView1.MultiSelect = true;

radGridView1.AllowColumnChooser = false;

GridViewDataColumn columnCSname = new GridViewTextBoxColumn();

columnCSname.HeaderText = "Standard column";

radGridView1.Columns.Add(columnCSname);

columnCSname.Width = 160;

columnCSname.ReadOnly = true;

this.AddCustomColumns(4);

this.AddNewRow();

columnCSname.IsPinned = true;

}

private void AddNewRow()

{

GridViewRowInfo rowInfo = this.radGridView1.Rows.AddNew();

int columnIndex = 0;

foreach (GridViewCellInfo cellInfo in rowInfo.Cells)

{

if (cellInfo.ColumnInfo.Index == 0)

{

cellInfo.Value = string.Format("Standard column, Col: {0}, Row: {1}", cellInfo.ColumnInfo.Index, rowInfo.Index);

}

else

{

CellValue cellValue = new CellValue();

cellValue.Text = string.Format("Col: {0}, Row: {1}", cellInfo.ColumnInfo.Index, rowInfo.Index);

cellInfo.Tag = cellValue;

}

columnIndex++;

}

private void radGridView1_CellFormatting(object sender, CellFormattingEventArgs e)

{

EditableCheckBoxCellElement cellElement = e.CellElement as EditableCheckBoxCellElement;

if (cellElement != null)

{

CellValue val = e.CellElement.RowInfo.Cells[e.CellElement.ColumnIndex].Tag as CellValue;

cellElement.Value = val;

}

private void AddCustomColumns(int count)

{

for (int index = 0; index < count; index++)

{

GridViewDataColumn newColumn = new EditableCheckBoxColumn();

newColumn.HeaderText = "Col" + (radGridView1.Columns.Count + 1).ToString();

newColumn.Name = newColumn.HeaderText;

newColumn.Width = 120;

if (radGridView1.Columns.Count == 0)

{ newColumn.IsPinned = true; }

radGridView1.Columns.Add(newColumn);

}

When I run application I see form from attachment viewAfterStartup.JPG. “Standard column” is pinned at left.

FIRST PROBLEM

If I resize window to smaller size then I have scroll bar on the bottom.

When I start scrolling to right I have problem with text box from custom cells – it overlaps on “Standard column”. This is weird because this problem is only for text box, for check box it is ok (check box does not overlap pinned column) – please check attachments “scrollingCheckBox-OK.JPG” and “scrollingTextBox-NOTok.JPG”. What is wrong in my source code?

SECOND PROBLEM

When I unpin “Standard column” I see in this column cells of class EditableCheckBoxCellElement. How it is possible? Name of column is correct but cells change type. Check attachment “unpinnedFirstColumn.JPG”.

Regards

GridView

answered on 05 Nov 2010

3 answers

150 views

[Solved] Accessing System and Header rows for empty child view

Hi there,

Just a quick question for you all: How can I get access to the SystemRows or the header row/cells of a child collection that's empty? Generally if I wanted to access those guys for a row that already exists I'd go

((GridViewDataRowInfo)row).ViewInfo.SystemRows

or

((GridViewDataRowInfo)row).ViewInfo.TableHeaderRow

respectively, but I can't figure out how to get access to those guys for an empty child collection because there's no "row" object I can latch onto if the parent's ChildRows is empty. I know they exist somewhere though because they're sitting there on my screen. I just feel like I must be missing something simple.

For reference, I'd like to set the child NewRow as the currently selected row when a new hierarchy row is created (so insertion would drill through the hierarchy, following the way my users would prefer to enter data) and I need to force an InvalidateRow on a child HeaderRow so that it fires the ViewCellFormatting event when the value of a certain cell is changed (so I can set the header text of the child view even if there are no children yet).

As an aside, in an attempt to solve the second issue I've tried to fire the grid.TableElement.Update() method with a parameter of GridUINotifyAction.Reset and GridUINotifyAction.DataChanged in my grid_CellValueChanged event, and it's throwing exceptions up to my Main method (bypassing my try/catch around the actual Update() call). Not sure if that's intentional/expected.

Thanks for any direction!

GridView

answered on 05 Nov 2010

1 answer

227 views

[Solved] Add new value to data source

Hey, not sure if I am missing something here, but I am not finding any way to add a new value to the underlying data source when user types a value into the drop down list that does not currently exist.

I mean, I have my own code that will handle this, I am jsut trying to determine the best time to do what is needed - if the user types in a value that does not exist in data bound list would it make sense to have the code in the TextChanges event, in the Validating event, or somewhere else?

Thanks!

Justin

DropDownList

answered on 05 Nov 2010

6 answers

202 views

[Solved] Alternating Row Colour Conundrum

Afternoon,

I've just got a strange behaviour from my gridviews. I recently updated my dataset and went about rebinding everything.

Since then however I have noticed that the alternating row colour no longer works. I am using the default colours.

The property window was telling me that it was set to true so I set this back to false and then to true again incase it had lost its setting but this changed nothing.

I have also set it to false/true inside both the property builder and set programmatically with the same result. I have also tried reopening the project.

Little bit stumped on this one, any one got any ideas?

Kind regards,

Guy

GridView

answered on 05 Nov 2010

1 answer

149 views

How to show MasterGridViewTemplate.Caption?

Hi,

I have a hierarchical grid and on the child grids (if there are more than one) on the same level, I'll get some nice captions as Tabs. Now I want these Tabs/Captions also for childgrids where only one grid at a specified level is and also for the MasterGridViewTemplate.

I'm setting already the captions, how can I show them?

Thanks,
Michael

GridView

answered on 05 Nov 2010

7 answers

340 views

[Solved] Datepicker Databinding Dilemma

Morning,

I think this question is not directly Telerik related but hopefully someone can help.

I have a datepicker and gridview databound. When I select a row on the gridview, the datepicker updates as I would expect but if I select a row with a blank date (DBNull I believe?) then it still retains the avlue from the previously picked date but still treats it as a null value.

I have looked through all the options I can think of in Formatting and Advanced Binding but nothing seems to work. I have also looked at ways of refreshing the databinding on row change but got no where (plus I don't think that's really the correct way of doing things).

If anyone could help or point me in the right direction i'd really appreciate it!

Kind regards,

Guy

Calendar, DateTimePicker, TimePicker and Clock

answered on 04 Nov 2010

3 answers

102 views

Migration from Rad Controls Winforms Q1 to Q2 2010

Hi All,
I have a project developed in .NET 3.5 framework using Rad Controles Winfoms Q1. I want to confirm that project developed using Rad Controls Winforms Q1 is compatable with Rad Controls winforms Q2 2010 with out any chane in code.

Thanks
Vijay

General Discussions

answered on 04 Nov 2010

4 answers

824 views

Very slow sorting with 100,000+ rows problem

I have multiple grids with 100,000+ rows in them. I found that allowing RadViewGrid control to do the sorting is very slow and freezes the application while sorting. I am thinking about implementing a SortableBindingList and do my sorting outside the grid and force it to show the newly sorted BindingList when done.

However, this means I have to turn sorting off in the grid, loosing the sort indicator and the context menu options for sorting.

What would you suggest in this scenario?

Thanks,

Phi

GridView

answered on 04 Nov 2010

5 answers

1.3K+ views

AddRange and GridView performance

Hi all,

I am experimenting some troubles in speeding up the filling of a RadGridView. If I fill it row by row (Add method) the result is correct but slow (more than 10s for 300 rows). If I create a GridViewRowInfo array and then fill the Grid with AddRange the task is completed istantaneously, but then the result differs from the one obtained through the Add method (problems in row selection and column resize, not depending on the AllowX properties). In particular I think the my errors are in creating each GridViewRowInfo, that needs a GridViewInfo that needs a GridViewTemplate. Here the code:

GridViewTemplate template = new GridViewTemplate();

template.AllowColumnResize = true;

foreach (GridViewColumn col in myGrid.Columns)

template.Columns.Add((GridViewDataColumn)col);

GridViewInfo info = new GridViewInfo(template);

GridViewRowInfo row = new GridViewRowInfo(info);

row.AllowResize = true;

// oRow contains the values for the cells

for (int i = 0; i < oRow.Length; i++)

row.Cells[i].Value = oRow[i];

row.Tag = epropSample;

Hope someone could help!
Thanks in advance!
Roberto