Questions on UI for WinForms Forum

10 answers

128 views

RadListControl Crashes VS2010 Designer

Here is the problem I am having:

1. I created a simple RadForm called form1.cs and added a number of labels, panels and text boxes to it. I run this form and everything is good.

2. I created a second RadForm called form2.cs and it extends form1.cs. I run this form and everything works fine.

3. I add a RadListControl to form2. I run this and the designer view of the form disappears, the program runs, when I exit the program I get an error stating "The designer loader did not provide a root component but has not indicated why." and the designer view is gone.

4. I close form2.cs, rebuild the project and open form2.cs and it appears in the designer. As soon as I make any code changes to form2.cs (even as simple as moving the locaiton of a control by one pixel), save and run the file I get the same error listed in step 3.

This only has happened to me with the RadListControl. textboxes, labels, panels, manu bars, status bars, etc. do not exhibit this behavior.

I have a full solution I can provide that causes the problem. Tried to open a support ticket but there is no option for the ListControl. Let me know what I should try next.

BTW, Computer is HP laptop, Windows 7, latest winForms release (Q2 SP1 build 806), VS 2010 Ultimate. I believe everyting Microsoft is at latest patch level.

ListControl

answered on 27 Jun 2016

1 answer

125 views

Mnemonic keys are shown with _ without Alt key

We have recently converted our controls from win form control to telerik control.

Now "_" is being shown for mnemonic all the time (without pressing Alt key).
Earlier when user press Alt key all the mnemonic get highlighted with _.
i want the same old visual style.
Any help will be really helpful.

Buttons, RadioButton, CheckBox, etc

answered on 24 Jun 2016

8 answers

956 views

Mnemonic activated without Alt key

When I press a key inside a grid, a mnemonic outside the grid is activated, instead of the grid entering edit mode.
For instance, with a combo box column, I expect the first item starting with the key pressed to be selected.

To reproduce, add a grid view, and standard win forms button to a form. Add the following code to the form:

public Form1()

{

InitializeComponent();

var list = new List<Data>();

list.Add(new Data(1, "Apple"));

list.Add(new Data(2, "Banana"));

list.Add(new Data(3, "Orange"));

var lookupList = list.ToList();

radGridView1.MasterTemplate.AllowAddNewRow = false;

radGridView1.MasterTemplate.AllowColumnChooser = false;

radGridView1.MasterTemplate.AllowDeleteRow = false;

radGridView1.MasterTemplate.AllowDragToGroup = false;

radGridView1.MasterTemplate.EnableGrouping = false;

radGridView1.ShowGroupPanel = false;

radGridView1.Columns.Add(new GridViewComboBoxColumn("Key") { DataSource = lookupList, ValueMember = "Key", DisplayMember = "Value" });

radGridView1.Columns.Add(new GridViewTextBoxColumn("Value"));

radGridView1.DataSource = list;

button1.Text = "&Button";

button1.Click += button1_Click;

}

private void button1_Click(object sender, EventArgs e)

{

RadMessageBox.Show(this, "Button Pressed");

}

Add the following class:

public class Data

{

public Data(int key, string value)

{

Key = key;

Value = value;

}

public int Key { get; set; }

public string Value { get; set; }

}

Click on a combo box cell and type "b". The button is activated, instead of selecting Banana in the combo.

Is this a bug?
Is there a work around?

GridView

answered on 24 Jun 2016

1 answer

377 views

Setting backcolor, gradient, etc. in code

I want to be able to set the backcolor for the chart itself with a gradient. I can easily set the backcolor property but don't see away to control the gradient. I see that in the property build under Edit UI Elements there is the RadChartElement. Not sure how to get to that programmatically? Please advise or let me know the correct way to accomplish this.

Thanks

ChartView

answered on 24 Jun 2016

9 answers

333 views

Custom Shape Editor

Hi

i use telerik 2015 q3 for winforms

i wanna change the shape of my labels. i have several labels and each of them must have their own shape.

i use the shape property in the in smart tag -> edit ui element -> root element -> shape

and select my predefiened shape and then change the border primitive shape and my label shape change successfully.

but when i use the create new shape instead of select predefined shape nothing happen and when i finish create new one in custom shape editor and click ok, no chnage apeare.

could you please tell me right way

Regard

Tools - VSB, Control Spy, Shape Editor

answered on 22 Jun 2016

3 answers

220 views

Add Current Selection to Filter

In Microsoft Excel there is an option named Add Current Selection to Filter. Actually, in Excel, when you search a key in filter popup and click OK, then when you search another key in filter popup then there is an option named 'Add Current Selection to Filter'. I need something like this option in radGridView Excel Like Filtering. Please see the attached file.

GridView

answered on 22 Jun 2016

1 answer

958 views

RadGridView's DataBindingComplete event handler in a async context and with the Telerik's WinForm RadGridView BestFitColumns method

Hi,

I'm having some problems with the RadGridView's DataBindingComplete event handler in a async context and with the Telerik's WinForm RadGridView BestFitColumns method.

I'm developing an winforms with Telerik application that loads data from several db tables and shows them in distinct RadGridViews (one for each table source).
Each of the grids is inside a DocumentWindow. Each DocumentWindow is inside DocumentContainer and all of the DocumentContainers are under a single aggregating Docking.DocumentTabStrip.

The process db table information process is asyncronous so that the UI is free allowing the user to see the information in one table when it becomes available even if one of the other tables are still being loaded.

The first problem is that the DataBindingComplete is only triggered when the user selects the respective tab. Since some of the DataBindingComplete logic can be quite time consuming it leads to a undesired user experience until the data is finally presented.
Is there an alternative event that can be triggered when the data is already available in the RadGridView but without the need of having the user triggering it?

The second is with the way the BestFitColumns method determines the column width. The native DataGridView column's AutoSizeMode contains a option of AllDataCellsExceptHeader that I'm unable to emulate in Telerik.
The documentation for these options is rather scarce and all of the tried options fall short.
Of the available options the closest are the AllCells, DisplayedCells and DisplayedDataCells as the others do not take in account the cell's values.
The AllCells and DisplayedCells use the column headers as input and that makes data spread out too much, which is undesired.
The closest is DisplayedDataCells that sort of works but the logic seems to only use the cells in the rows in the visible range. (I.E.: the rows presented when the grid is presented in the UI). Trying to explain better, if form only displays the first Nth data rows, after the method runs the data will be visible correctly formatted, but if the (N+1) row data has a width larger than any of the first Nth rows the displayed data will be truncated and suffixed with the "..". Is there a way to emulate the AllDataCellsExceptHeader at all?

Thanks for your help.

Regards,

I've implement it using the following logic (snipped code).

(..)

private async void displayButton_Click (object sender, EventArgs e) {

(..)

await Task.Run(() => Parallel.ForEach(tablesToRetrieve.Keys, tableID => {

(..)

DocumentWindow docWindow = ((DocumentWindow)returnedDataDocumentTabStrip.Controls[tableName]);

if (GetDBTableData(tableID, tableArguments, out dataTable)) {

docWindow.Invoke((Action)delegate {

docWindow.Controls.Add(newRadView(dataTable));

docWindow.Refresh();

});

}

(..)

}));

}

(..)

private RadGridView newRadView(DataTable dTable) {

RadGridView gridView = new RadGridView();

gridView.AutoSizeRows = false;

gridView.AllowAutoSizeColumns = true;

gridView.ReadOnly = true;

gridView.AutoExpandGroups = true;

gridView.AllowAddNewRow = false;

gridView.AllowDeleteRow = false;

gridView.AllowColumnReorder = true;

gridView.AllowColumnResize = true;

gridView.MultiSelect = true;

gridView.SelectionMode= GridViewSelectionMode.CellSelect;

gridView.EnableFiltering = true;

gridView.MasterTemplate.EnableFiltering = true;

gridView.ShowHeaderCellButtons = true;

gridView.EnableAlternatingRowColor = true;

gridView.EnableGrouping = true;

gridView.MasterTemplate.EnableGrouping =true;

gridView.EnableSorting = true;

gridView.MasterTemplate.EnableSorting = true;

gridView.TableElement.AlternatingRowColor = Color.FromArgb(240, 240, 240);

gridView.TableElement.RowHeight = 18;

gridView.ShowFilteringRow = true;

gridView.Dock = DockStyle.Fill;

gridView.AllowSearchRow = true;

gridView.SearchRowPosition = SystemRowPosition.Bottom;

gridView.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.None;

gridView.Name = dTable.TableName;

/* Arm events handlers

gridView.ViewCellFormatting += gridView_ViewCellFormatting;

gridView.DataBindingComplete += gridView_DataBindingComplete;

gridView.ToolTipTextNeeded += gridView_ToolTipTextNeeded;

/* Load dataTable data */

gridView.BeginUpdate();

gridView.DataSource = new BindingSource(dataTable, null);

/* Customize table sort assumptions */

gridView.SortDescriptors.Add(new SortDescriptor("DUMMY_COLUMN", System.ComponentModel.ListSortDirection.Descending));

gridView.EndUpdate(true);

return gridView;

}

(..)

private void gridView_ViewCellFormatting(object sender, CellFormattingEventArgs e) {

if (e.CellElement.GetType() == typeof(GridHeaderCellElement))

e.CellElement.TextWrap = true;

}

(..)

private void gridView_DataBindingComplete(object sender, GridViewBindingCompleteEventArgs e) {

RadGridView gridView = (RadGridView)sender;

/* Show/Shift/Hide columns to display */

(..)

/* Finally Adjust columns to it's data */

gridView.BestFitColumns(BestFitColumnMode.DisplayedDataCells);

}

GridView

answered on 22 Jun 2016

1 answer

42 views

Calendar CurrentTimePointer - Only for current week

Hi,

I was wondering how I would go about modifying the radCalender control so that the currentTimePointer is drawn only on the current week rather than on every week in the calendar.

I already have a customDayViewApppointmentsTable class that derives from the DayViewAppointmentsTable class that I've used to modify the size of the currentTimePointer, would the desired functionality be accessed through another override in this class?

Thanks,

Robert

Calendar, DateTimePicker, TimePicker and Clock

answered on 21 Jun 2016

3 answers

146 views

ComboBoxColumn

I need a ComboBox column initialized with some data and the user can enter new data too when inserting new row into grid. For example, ComboBox column has three items by default Phone, Mobile, Fax, but the user needs to insert new item (e.g., Code). How can I do this?

Here is the code. With this code the user can only select one of the default values of combo column and he/she cannot enter his/her new value into combo column.

DataTable table = new DataTable();

table.Columns.Add("Name", typeof(string));

table.Columns.Add("Value", typeof(string));

var details = db.BatchItemDetails.Where(d => d.BatchItem_Id == _id)

.Select(d => new { d.Name, d.Value });

foreach (var row in details)

table.Rows.Add(row.Name, row.Value);

grid.MasterTemplate.AutoGenerateColumns = false;

grid.DataSource = table;

GridViewComboBoxColumn name = new GridViewComboBoxColumn();

name.DataSource = (from b in db.Batches

join i in db.BatchItems on b.Id equals i.Batch_Id