Questions on UI for WinForms Forum

1 answer

129 views

Error due dynamically change RadComboBox items

I try to change RadComboBoxItems collection through casting SelectedIndexChanged event (for localization reasons). And it works fine in version 2009.2.729. But in current version 2009.3.1103 it produced exception ("Object reference not set to an instance of an object") if I change item in combobox. If I press button - all works fine.

What's wrong with that code?

    
            Public Class RadForm1 
        
                Private m_cmbCurLanguage As Boolean = False 
        
                Private Sub RadForm1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 
        
                    AssignCurLanguage(0) 
        
                    m_cmbCurLanguage = True 
        
                End Sub 
        
                Private Sub AssignCurLanguage(ByVal lng As Integer) 
        
                    Dim lng1 As String = "", lng2 As String = "", lng3 As String = "" 
        
                    Select Case lng 
        
                        Case 0 
        
                            lng1 = "Eng1" : lng2 = "Ger1" : lng3 = "Fra1" 
        
                        Case 1 
        
                            lng1 = "Eng2" : lng2 = "Ger2" : lng3 = "Fra2" 
        
                        Case 2 
        
                            lng1 = "Eng3" : lng2 = "Ger3" : lng3 = "Fra3" 
        
                    End Select 
        
                    m_cmbCurLanguage = False 
        
                    cmbCurLanguage.Items.Clear() 
        
                    cmbCurLanguage.Items.Add(New Telerik.WinControls.UI.RadComboBoxItem(lng1, 0)) 
        
                    cmbCurLanguage.Items.Add(New Telerik.WinControls.UI.RadComboBoxItem(lng2, 1)) 
        
                    cmbCurLanguage.Items.Add(New Telerik.WinControls.UI.RadComboBoxItem(lng3, 2)) 
        
                    cmbCurLanguage.SelectedIndex = lng 
        
                End Sub 
        
                Private Sub cmbCurLanguage_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbCurLanguage.SelectedIndexChanged 
        
                    If m_cmbCurLanguage Then 
        
                        AssignCurLanguage(cmbCurLanguage.SelectedIndex) 
        
                        m_cmbCurLanguage = True 
        
                    End If 
        
                End Sub 
        
                Private Sub RadButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadButton1.Click 
        
                    AssignCurLanguage(1) 
        
                    m_cmbCurLanguage = True 
        
                End Sub 
        
            End Class

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 18 Nov 2009

1 answer

119 views

Combobox inside radgridview notworking

Hi
I am trying to get a combobox inside the radgridview. Below code doesnt seem to work. Any help would be appreciated

   Dim farmer As New UI.GridViewComboBoxColumn()
            farmer.DataType = GetType(String)
            farmer.UniqueName = "UserID"

            farmer.HeaderText = "Farmer"
            farmer.DataSource = GetFarmerDataSource()
            farmer.DisplayMember = "UserID"
            farmer.ValueMember = "UserCode"
            farmer.FieldName = "UserID"
            farmer.Width = 150

            rgvBill.MasterGridViewTemplate.Columns.Add(farmer)

            Dim Bags As New UI.GridViewTextBoxColumn()
            Bags.DataType = GetType(Int32)
            Bags.UniqueName = "Bags"
            Bags.FieldName = "Bags"
            Bags.HeaderText = "Bags"
            Bags.Width = 50
            rgvBill.MasterGridViewTemplate.Columns.Add(Bags)

My radgrid at design time has no columns defined

GridView

answered on 18 Nov 2009

3 answers

207 views

Row Selection Events

Good Afternoon,

I recently upgraded to the new Radcontrols for Winforms 2009 Q3 and noticed an issue with code that was previously working.

In my grid's I was handling the "CurrentRowChanged" event as it seemed this event would fire after the current row had changed allowing me to look at "GridView1.CurrentRow.GridViewInfo.CurrentIndex" to get the new index of the row that was selected. From this I was able to get some information from a specific Cell that contained an ID and query my database to load assocaited information.

Unfortuantely since installing 2009 Q3, this event still fires, but the resulting Index is always 0 even though the grid itself visually does display the highlighted row properly.

Has something changed with the "CurrentRowChanged" event, should I be using "SelectionChanged" instead? If so I could not find any exampled for "SelectionChanged"

In reality all I am wanting to do is get the index of the newly selected row after it is clicked on.

Any help would be apprecaited.

Thank You,

Chris Eisnaugle

GridView

answered on 18 Nov 2009

2 answers

165 views

RadDock DragDrop: How do I determine the dragged item.

Hi

I have a RadDock control (named dockManager) that I am listening to the drag/drop service on, using the following code in the form's constructor:

    
                        DragDropService dragDrop = dockManager.GetService<DragDropService>();  
        
                        dragDrop.DragDropMode = DragDropMode.Preview;  
        
                        dragDrop.PreviewDockPosition += new DragDropDockPositionEventHandler(dragDrop_PreviewDockPosition);  
        
                        dragDrop.Starting += new StateServiceStartingEventHandler(dragDrop_Starting);  
        
                        dragDrop.AllowedStates = AllowedDockState.All & ~AllowedDockState.TabbedDocument;

I need to determine whether I am dragging a ToolWindow, a DockTabStrip and also determine the type of toolwindow/DockTabStrip
At the risk of asking a stupid question, how do I determine what object I am dragging in dragDrop_Starting event handler and/or dragDrop_PreviewDockPosition?

Thanks in advance

Alan

Dock

answered on 18 Nov 2009

1 answer

101 views

Can't bring back docked windows

Hi there,

Not sure if this is DEU syndrome or not, but I seem to have closed the windows in the StyleBuilder, and can't for the life of me figure out how to get them back. This only seems to be the case from an instance that runs after being initiated from VS. If I run from the start menu, the proper windows are displayed. I tried to rename the cfg file from ProgramData, but it didn't seem to make a difference.

Thanks.

Ashley

Themes and Visual Style Builder

answered on 18 Nov 2009

1 answer

144 views

Implementing Scheduler with ADO.net

I'm developing a project where i have to use the ADO.net architecture. I'm trying to understand the whole SchedulerDataDataSet, but i'm kinda stuck. If there any way to change everything and do it with a Business Entities Component and a Data Acces Layer Component.

Scheduler and Reminder

answered on 18 Nov 2009

1 answer

187 views

RadMarkupDialog assembly?

I'm trying to get the RadMarkupDialog working at runtime (using the code from http://www.telerik.com/help/winforms/radmarkupdialog.html). I have references to Telerik.WinControls, Telerik.WinControls.UI, Telerik.WinControls.UI.Design, TelerikCommon, and TelerikData (all 2009.3.9.1103) and can't find the RadMarkupDialog class in any of them. Did the runtime version not make it in to Q3 or am I missing something?

General Discussions

answered on 18 Nov 2009

1 answer

128 views

BeginEdit for added row fails on first insert

What I am trying to do is add a new row to a grid and then automatically set it to edit mode. What i'm finding is this fails on the first row that is inserted, but for every other row it works fine. I have tried setting current row/column a few different ways and found the same behaviour. Have set up a basic example of it below.

    
                    private void Form1_Load(object sender, EventArgs e) 
        
                    { 
        
                        radGridView1.MasterGridViewTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill; 
        
                        radGridView1.ShowGroupPanel = false; 
        
                        radGridView1.MasterGridViewTemplate.EnableGrouping = false; 
        
                        radGridView1.MasterGridViewTemplate.AllowAddNewRow = false; 
        
                        GridViewComboBoxColumn col1 = new GridViewComboBoxColumn("Test1", "Test1"); 
        
                        col1.DropDownStyle = RadDropDownStyle.DropDownList; 
        
                        col1.FieldName = "Test1"; 
        
                        col1.DisplayMember = "Test1"; 
        
                        col1.DataType = typeof (int); 
        
                        col1.DataSource = new[] {1, 2, 3}; 
        
                        col1.AutoCompleteMode = AutoCompleteMode.SuggestAppend; 
        
                        radGridView1.Columns.Add(col1); 
        
                    } 
        
                    private void button1_Click(object sender, EventArgs e) 
        
                    { 
        
                        int rowCount = radGridView1.Rows.Count; 
        
                        object[] values = {1}; 
        
                        radGridView1.Rows.Add(values); 
        
                        radGridView1.MasterGridViewInfo.CurrentRow = radGridView1.Rows[rowCount]; 
        
                        radGridView1.Rows[rowCount].Cells["Test1"].BeginEdit(); 
        
                    }

What happens is the first row will get inserted without being in edit mode. if you click the button every other row works correctly.

Is there anything that i'm doing wrong in this case?

Version i'm using is: Q2 2009 SP1.

Have attached an image of the result. http://bayimg.com/image/maefbaaco.jpg

GridView

answered on 18 Nov 2009

1 answer

250 views

Default Cell Value on edit

During the CellBeginEdit event I need to supply a default value for the cell if there is no data in the cell and only during an Edit event. I initialized the default value during the CellEditorInitialized event and all works, the default value appears.

    
            Private Sub gv_CellEditorInitialized(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCellEventArgs) Handles gv.CellEditorInitialized  
        
                If TypeOf gv.ActiveEditor Is RadTextBoxEditor Then 
        
                    gv.ActiveEditor.Value = IIf(object.Data= 0, "",object.Data)  
        
                End If 
        
            End Sub

Now when the Enter Key is pressed (accepting the default value) the CellEndEdit event is fired and I have the following code:

    
            If IsNumeric(e.Value.ToString) Then 
        
              object.data = e.Value  
        
            End If

The issue is that the Cell Value (e.value) is never equal to the default value, it's empty.

Any help greatly appreciated.

GridView

answered on 18 Nov 2009

3 answers

183 views

Initializing RadTreeNodes to expanded

What's the recommended solution for expanding a tree view when bound to an object data source. The created nodes are collapsed by default and I don't see a way to change the default behavior, nor do I see any events indicating when a node is added

Treeview

answered on 18 Nov 2009