Questions on UI for WinForms Forum

1 answer

244 views

Best practice in many-to-many relationships?

Hi!

After a quick search I discovered that many-to-many relationships aren't supported in the GridView (using data binding). But, I still need to display such data, and wonder what your recomendations are to accomplish this.

Scenario:
Two classes:
- Concert
- City

The City can host zero or many Concerts, and a Concert man be held in zero or many cities. Class definitions below:

    
                    class Concert  
        
                    {  
        
                        string Name;  
        
                        List<City> Cities;  
        
                    }  
        
                    class City  
        
                    {  
        
                        string Name;  
        
                        List<Concert> Concerts;  
        
                    }

I load the all the Cities into a separate List<City>, and all Concerts into another List<Concert> and via another method I resolve the many-to-many relationships:

    
                    void LoadData()  
        
                    {  
        
                        List<City> AllCities = LoadAllCities(); // Load data from database  
        
                        List<Concert> AllConcerts = LoadAllConcerts(); // Load data from database  
        
                        ResolveRelationships(AllCities, AllConcerts); // Resolve many-to-many relationship  
        
                    }

I have only created ONE object instance per City and ONE object instance per Concert. The ResolveRelationships method just reads a relation-table and populates the City.Concerts and Concert.Cities collections. The City.Concerts and Concert.Cities collections just contain references to the objects originally loaded into AllCities and AllConcerts.

Now I want to display this into a grid. The MasterGridView can contain the Concerts and the ChildGridView can contain the Cities (or vice versa).

What are your recomendations on how to accomplish this? Manually create the grid or use some kind of object datasource?

Thanks in advance,
Johan

GridView

answered on 05 Feb 2010

2 answers

1.0K+ views

Scrollbar visibility in RadGridview

Hello
I have an issue with my radgridview
Whenever i try to add 'n' no of items in a radgridview.. the scrollbar appears automatically.... which is desirable
I now delete all the items in the radgridview.. but the scrollbar is still visible... Is there any way i can force my scrollbars to hide ??

Regards
Srivatsa

GridView

answered on 05 Feb 2010

1 answer

167 views

Validating Cell Values with color changes

Hi,

I am using a datagrid in which all editable columns are shown in a different color which i am doing on cell formatting , however when data is entered in cells which is invalid i want to change the back color to Red .

Here i want to make sure that user is taken back to cell in which he was doing editing also when the value he has enetred is correct the back color should change back to editable back color.

Also can't we show errortext in cell directly rather then showing it on grid.

Thanks
Anuj

GridView

answered on 05 Feb 2010

6 answers

308 views

Auto Hide Docking Panel Min Width

Hello

I have a docking manager with 2 panels. one fixed and one auto hide.
When the auto hide panel is activated I want it to open the full width of the docking manager but at the moment it only opens a 1/4 (ish) the way.
I have tried setting the "minimumsize" and the "minsize" and the "size" attribute but none of them seem to make any difference, although I cannot find any documentation on the "minsize" attrib.

Is it possible to do this?

Thanks

Bex

Dock

answered on 05 Feb 2010

4 answers

316 views

Complete Outlook Style with Expand & Collapse style

Hello,
I am searching to reproduce the outlook pane style in my application. In the radcontrols for winforms I found the panelbar which can be used as outlook bar when the group style is set to OutlookNavPane. It's almost like the official outlook bar.
But I didn't see the button wich allows to collapse the panelbar to a minimal state (icons still visible on the left...)

Can you tell me please If the PanelBar control allows that ? I absolutely need this functionnality..

Thank you

Panelbar (obsolete as of Q2 2010)

answered on 04 Feb 2010

0 answers

133 views

error when i'm using radgridview

    
            ' Comunicação com a Camada BLL 
        
                    Dim obj As New EspecialidadesBLL 
        
                    especialidadesDataGridView.DataSource = obj.Listagem() 
        
                    ' Atualizando os objetos TextBox 
        
                    idesp.Text = especialidadesDataGridView(0, especialidadesDataGridView.CurrentRow.Index).Value.ToString() 
        
                    TextBox16.Text = especialidadesDataGridView(1, especialidadesDataGridView.CurrentRow.Index).Value.ToString() 
        
                    TextBox6.Text = especialidadesDataGridView(2, especialidadesDataGridView.CurrentRow.Index).Value.ToString()

hi all

now i'm using telerik winform Q3 2009

in this code above, i dont have any error when using datagridview, but when i want to use radgridview i get this error:

Error 1: Class 'Telerik.WinControls.UI.RadGridView' cannot be indexed because it has no default property.

Error 2: 'Index' is not a member of 'Telerik.WinControls.UI.GridViewRowInfo'.

how can i solve this error????????????

GridView

asked on 04 Feb 2010

5 answers

680 views

Hide duplicate values /repetitions in (hierachy) grid

Hey folks,

I figure if there is any way to hide repeated cell values in my grid. I attached a screenshot and want to hide the redundant information in the first 3 columns. I am wondering if there might be an intelligent way of doing with the grid control.

Has anybody of you guys a cool idea to me?

I attached a screenshot which shows my actual grid and a grid which looks like it should be.
At this moment I do not have any idea except of iterating thorugh the rows. Additonally the difficulty is that this is a hierachy grid which is bound to the childtemplate by the first thre rows. So the best way should be formatting the cells with the fore color white, right?

Any thought?! ;)

Thanks in advance.

Best

GridView

answered on 04 Feb 2010

1 answer

1.1K+ views

How to expand specific group in code?

Hi,

I have hierarchical RadGridView where MasterGridViewTemplate.AutoExpandGroups is set to False. Code for binding is like this.

                    PatientGridView.DataSource = currentPatientList;         
            GridGroupByExpression patientExpression = new GridGroupByExpression();         
            patientExpression.Expression = "FullName as FullName format \"{1}\" Group By OrderID";         
            PatientGridView.MasterGridViewTemplate.GroupByExpressions.Add(patientExpression);         

After binding I want to programatically expand some groups by certain condition. I have tried with following code but it doesn't work:

                                foreach (GridViewRowInfo row in PatientGridView.Rows) {         
                            if (someCondition == true) {         
                                row.IsExpanded = true;         
                                row.IsSelected = true;         
                                PatientGridView.GridNavigator.SelectRow(row);         
                            }         
                        }         

Can you advise how to programmatically expand specific group in RadGridView where all groups are collapsed by default?

Regards,

Tomislav

GridView

answered on 04 Feb 2010

5 answers

421 views

Add a new row problem

hi
iam trying to add some rows in code
the firsr row is added alone then ina loop all other rows are added
but the grid acts in very stupid way that its added the firts row and adds all other row on top of it
i have chnaged the way the new row added to buttom and also tried the top but nothing works
can u plz help couse iam very unhappy using this grid and if some more problems appears i will throw it away

GridView

answered on 04 Feb 2010

4 answers

252 views

upgrade problems

I've migrated a winform project to the 2009.3.9.1203 version of your controls and I have several issues:

- I can't open a form in VS designer, it says:
System.InvalidCastException: Unable to cast object of type 'Telerik.Charting.Styles.Unit' to type 'Telerik.Charting.Styles.Unit'.
The error occurs with these lines:

chartMarginsTitle1.Bottom = ((Telerik.Charting.Styles.

Unit)(resources.GetObject("chartMarginsTitle1.Bottom")));

- my RadGrids lose their Size property, their width takes big big values, and I need to reset them manually....

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