Questions on UI for WinForms Forum

1 answer

61 views

When you load dropdownlist shows the incomplete text of the first item

DropDownList

answered on 27 Apr 2011

1 answer

163 views

Custom Sort

I need to perform a custom sort that is different depending on which column the user selects for the sort.

I cannot seem to determine which column the user selected to sort within the CustomSorting event.

e.Column and e.GridViewTemplate are both deprecated.

How do I determine the column that the user selected for the sort within the CustomSorting event?

GridView

answered on 27 Apr 2011

7 answers

213 views

Splitted link on RadLabel

We recently updated to Q1 2010 SP2.

We have a RadLabel on a form with the the following for the text property:

<html><a href="about:blank">Advanced Mode</a></html>

This worked fine before SP2, but now it display with no underline where there is a space. In other words, instead of having Advanced Mode underlined as a link, only the 2 words are underline, making it appear as these are two different links.

How do I fix this?

Label

answered on 27 Apr 2011

3 answers

402 views

Programmatically Setting Custom Control Cell values In Hierarchical Child Rows

How can I programmatically change the checked/unchecked value in child row cells displayed as custom cells derived from RadCheckBoxElements? Here are details of my appliation:

I have an unbound Q1 2011 RadGridView control with a single hierarchical child level in a VB.Net 2010 Winforms application . There is a 1-to-many parent-child value relationship - ie a single parent row can have multiple child row values. When the RadGridView is expanded, the multiple child rows are made up of custom cells derived from a RadCheckBoxElement. I am using a custom cell derived from RadCheckboxElement rather than a GridViewCheckView column because I want to show a text value in the cell along with the checkbox.

Selecting a child row RadCheckBoxElement-derived cell updates a value in the parent row but also needs to uncheck any other checkboxes in the same child rows. My custom RadCheckBoxElement cell takes an EventHandler as a constructor parameter so the MouseUp event of the RadCheckBoxElement can call the parent form to update the desired parent row cell. I cannot figure out how to iterate through the other child row custom cells to uncheck any checked RadCheckBoxElements.

I have created my custom cell element class derived from GridDataCellElement. Here is the partial class definition:

Public Class CheckBoxCellElement

Inherits GridDataCellElement

Private chkBox As RadCheckBoxElement

Private clickEvent As EventHandler

Public Sub New(ByVal column As GridViewColumn, ByVal row As GridRowElement, ByVal extClickEvent As EventHandler)

MyBase.New(column, row)

clickEvent = extClickEvent

End Sub

In the overridden CreateChildElements method I create the RadCheckboxElement and add a handler for the MouseUp event which in turn calls the passed in clickEvent. This clickEvent is passed in from the parent form in the RadGridView_CreateCell event thus:

Private Sub RadGridView1_CreateCell(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCreateCellEventArgs) Handles RadGridView1.CreateCell

If Not TypeOf e.Column Is CheckBoxColumn OrElse Not TypeOf e.Row Is GridDataRowElement Then Return

e.CellElement = New CheckBoxCellElement(e.Column, e.Row, New EventHandler(AddressOf CheckBoxElementClicked))

Here is the method in the parent form that updates the desired RadGridView.ParentRow value - note that CheckBoxCellEventArgs is inherited from EventArgs with some extra fields:

Private Sub CheckBoxElementClicked(ByVal sender As Object, ByVal e As EventArgs)

If Not TypeOf sender Is RadCheckBoxElement OrElse Not TypeOf e Is CheckBoxCellEventArgs Then Return

Dim evArgs As CheckBoxCellEventArgs = CType(e, CheckBoxCellEventArgs)

RadGridView1.MasterTemplate.Rows(evArgs.ParentRowIndex).Cells(_ciParentRowOptionValueColIndex).Value = evArgs.NewValue

End Sub

I've tried finding a way to iterate through the custom cells containing RadCheckBoxElements in both the custom cell class RadCheckBoxElement_MouseUp event handler and in the parent form method passed in to the custom cell constructor as an EventHandler. Guidance would be most welcome.

Thanks,

Frank

GridView

answered on 27 Apr 2011

9 answers

222 views

Trailing effect on moving the form...

Hi,

I have downloaded the latest trial version of WinForms Q1 2011. I have added a new Telerik project and removed the original Form1 and added a RadForm. Then had added the Office2007Black theme. Added a SlitContainer with two horizontal panels. Now when I run the project and moved the form around the screen, it shows a trailing effect.

I have attached the screenshot with this.

Why is it so ?

General Discussions

answered on 27 Apr 2011

1 answer

187 views

MultiSelect + vertical scrolling = big problem

I'm using 2011 Q1 Service Pack 1 release.
When MultiSelect is enabled, the rows unexpectedly get selected if (and it happens easily) the mouse gets out of the scrollbar area and into the grid area while scrolling up/down the grid. This is not a standard Windows behavior and is a huge problem for our customers.

We chose Telerik hoping it helps, but every time we try one of the features, we run into problems... really frustrating.

Below is a sample that shows the problem, and the attached image shows how the rows were incorrectly selected while scrolling. I hope there is a workaround for it.

Andy

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Telerik.WinControls.UI;

namespace RadControllTest

{

public partial class Form5 : Form

{

RadGridView myGrid;

MyGridBehavior myGridBehavior;

public Form5()

{

InitializeComponent();

SetupGrid();

}

private void SetupGrid()

{

myGrid = new RadGridView();

myGrid.Dock = DockStyle.Fill;

myGrid.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

myGrid.MultiSelect = true;

GridViewTextBoxColumn nameColumn = new GridViewTextBoxColumn("Name");

myGrid.Columns.Add(nameColumn);

myGrid.ViewCellFormatting += new CellFormattingEventHandler(gridView_ViewCellFormatting);

myGrid.ChildViewExpanding += new ChildViewExpandingEventHandler(gridView_ChildViewExpanding);

myGrid.CurrentRowChanging += new CurrentRowChangingEventHandler(myGrid_CurrentRowChanging);

myGridBehavior = new MyGridBehavior();

myGrid.GridBehavior = myGridBehavior;

GridViewTemplate childTemplate = new GridViewTemplate();

myGrid.Templates.Add(childTemplate);

GridViewDecimalColumn idColumn = new GridViewDecimalColumn("ID");

childTemplate.Columns.Add(idColumn);

GridViewTextBoxColumn childNameColumn = new GridViewTextBoxColumn("Name");

childTemplate.Columns.Add(childNameColumn);

GridViewRelation relation = new GridViewRelation(myGrid.MasterTemplate, childTemplate);

relation.ChildColumnNames.Add("Children");

myGrid.Relations.Add(relation);

this.Controls.Add(myGrid);

BindingList<MockParent> parents = new BindingList<MockParent>();

for (int i = 0; i < 100; i++)

{

MockParent p = new MockParent("Parent " + i.ToString());

if ((i % 2) == 0)

{

BindingList<MockChild> children = new BindingList<MockChild>();

for (int j = 1; j < 5; j++)

{

children.Add(new MockChild(j, "Child " + j.ToString()));

}

p.Children = children;

}

parents.Add(p);

}

myGrid.DataSource = parents;

myGrid.AutoGenerateHierarchy = true;

childTemplate.ShowColumnHeaders = false;

childTemplate.ShowRowHeaderColumn = false;

}

void myGrid_CurrentRowChanging(object sender, CurrentRowChangingEventArgs e)

{

System.Diagnostics.Debug.WriteLine("CurrentRowChanging");

if (myGridBehavior.ExpanderClicked)

{

System.Diagnostics.Debug.WriteLine("CurrentRowChanging Canceled");

e.Cancel = true;

}

void gridView_ChildViewExpanding(object sender, ChildViewExpandingEventArgs e)

{

if ((e.ParentRow != null) && (e.ParentRow.ChildRows.Count < 1))

{

e.Cancel = true;

}

void gridView_ViewCellFormatting(object sender, CellFormattingEventArgs e)

{

GridGroupExpanderCellElement cell = e.CellElement as GridGroupExpanderCellElement;

if (cell != null && e.CellElement.RowElement is GridDataRowElement)

{

if ((cell.RowInfo.ChildRows != null) && (cell.RowInfo.ChildRows.Count > 0))

{

cell.Expander.Visibility = Telerik.WinControls.ElementVisibility.Visible;

}

else

{

cell.Expander.Visibility = Telerik.WinControls.ElementVisibility.Hidden;

}

private class MyGridBehavior : BaseGridBehavior

{

public bool ExpanderClicked { get; set; }

public override bool OnMouseDown(MouseEventArgs e)

{

System.Diagnostics.Debug.WriteLine("MouseDown");

ExpanderClicked = false;

if (this.CellAtPoint is GridGroupExpanderCellElement)

{

GridViewRowInfo row = this.CellAtPoint.RowInfo;

if ((row != null) && (row.ChildRows.Count > 0))

{

ExpanderClicked = true;

}

return base.OnMouseDown(e);

}

public override bool OnMouseUp(MouseEventArgs e)

{

System.Diagnostics.Debug.WriteLine("MouseUp");

ExpanderClicked = false;

return base.OnMouseUp(e);

}

private class MockParent

{

public string Name { get; set; }

public BindingList<MockChild> Children { get; set; }

public MockParent(string s)

{

Name = s;

}

private class MockChild

{

public int ID { get; set; }

public string Name { get; set; }

public MockChild(int id, string s)

{

ID = id;

Name = s;

}

GridView

answered on 27 Apr 2011

3 answers

254 views

[Solved] Where is RadMessageBox ?

Hi

I didn't see RadMessageBox listed in my toolbox ! From where can I add it ?

General Discussions

answered on 27 Apr 2011

1 answer

143 views

Duff Demo

Go to the Buttons demo. Select the radio buttons demo.

Now pick one of the Office2010 themes.

The shaped checkboxes all become circles.

The non-office themes are OK though.

--
Stuart

Buttons, RadioButton, CheckBox, etc

answered on 26 Apr 2011

3 answers

160 views

[Solved] Updating to Q1 2011 SP1

I have a question for those of you that have updated your Telerik WinForms controls to the recently released SP1 version. Did you have manually set your projects referencing Telerik WinForms controls to be writable before you could do the update? I did and have had to do so for each version update.

My question to Telerik is this; why is this not accounted for in their Project Update Utility? To the best of my knowledge Visual Studio typically sets all project files to be read-only so that changes are less likely to be made outside of Visual Studio, especially when source control is used. Visual Studio has no trouble writing back to project files every time you save your changes. This leads me to believe that it would also be possible for the Project Update Utility to do so, as well.

Granted, Microsoft may "cheat" when it comes to saving changes to read-only files, as they do in other instances of needing to "fudge" permissions, but there should be a way for a third-party provider to do so as well. Any light that can be shed on this would be greatly appreciated!

General Discussions

answered on 26 Apr 2011

11 answers

264 views

[Solved] Quick Filter Bar

Good Day,

I would like to know if this is currently possible with the RadGrid, Please see image link. I would like a statusbar type control but in the radgrid so when a user adds a filer he will be able to quickly cancel all the filters or just disable/enable the filter quickly.

If it's not possible can you please think of adding it to the next release as this will be a nice user experience addition.

FilterStatus_Image

GridView

answered on 26 Apr 2011