Questions on UI for WinForms Forum

9 answers

733 views

Multi-Column Listbox

The standard listbox supports multicolumn. Is this soemthing the RadListbox will support?

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 10 Jan 2011

1 answer

458 views

how to select value from multicolumn combobox??

Hi there....

I tried to select value from editor control then pass that to a textbox...
i'm already tried this from documentation:

Dim test As String

test = String.Format("Row changed, current Name = {0}", RadMultiColumnComboBox1.EditorControl.Rows(RadMultiColumnComboBox1.SelectedIndex).Cells("ContactName").Value)

textbox1.text = test

that code return me an error like this:

"Object reference not set to an instance of an object."

What should i do??

MultiColumn ComboBox

answered on 10 Jan 2011

5 answers

180 views

Problem with Grid / rows position

Hello, I've got a problem with the grid position
In some specific case, the rows position in the RadGridView are too high.
So when the scroll bar is at the top, you are missing some rows
And when you are at the bottom, you have empty space.

So this happen when I call BeginUpdate(); EndUpdate(); while I'm scrolling.
And only scrolling with the left click (no wheel)
Use the sample code and left clic on the scrollbar, go all the way down, and Voila.
Everything go back to normal if you use the wheel all the way to the Top. But it's not acceptable for our user

const int CST_AUTO_EXPAND_START = 15; //Last %

bool m_alreadyScroll = false;

public Form1()

{

InitializeComponent();

}

private void AddDatas()

{

List<string> datas = new List<string>();

for (int i = 0; i < 50; i++)

{

datas.Add("string" + i.ToString());

}

radGridView1.DataSource = datas;

}

public void ExpandPage()

{

m_alreadyScroll = true;

radGridView1.BeginUpdate();

//Normally I would update my datasource here threw a background worker

radGridView1.EndUpdate();

}

private void Form1_Load(object sender, EventArgs e)

{

radGridView1.GridElement.VScrollBar.ValueChanged += new EventHandler(VScrollBar_ValueChanged);

AddDatas();

}

void VScrollBar_ValueChanged(object sender, EventArgs e)

{

if (m_alreadyScroll)

return;

Telerik.WinControls.UI.RadScrollBarElement scrollBar = (Telerik.WinControls.UI.RadScrollBarElement)sender;

int maxValue = scrollBar.Maximum - scrollBar.LargeChange;

//if the scroll bar is in the bottom zone, we search for new data

if (maxValue - maxValue * CST_AUTO_EXPAND_START / 100 < scrollBar.Value)

ExpandPage();

}

GridView

answered on 10 Jan 2011

7 answers

164 views

Selected row changing unexpectedly

I am finding that if you have a sort on a colum and you edit that value so that it change position in the grid, that sometimes when you tab out of that field a completely different row is selected, and you are now editing the wrong cell.

I have been able to reproduce the behavior on the demo application - Gridview - Populate with data - select Dataset, sort by Postal Code

Its doesnt happen every time on the demo, but it does on my application (Q3 2010)

ALastair

GridView

answered on 10 Jan 2011

5 answers

239 views

Rad grid view filtering

Special characters should be validated in the grid view filter cell & Custom filter dialog from context menu

I tried the following ways and it was successful for Rad grid view filter cell

I tried validating in filter changing event while the user enters in the filter cell

If (grid.IsInEditMode = True) Then

If (grid.ActiveEditor.Value IsNot Nothing) Then

Dim strFilterCellValue As String = grid.ActiveEditor.Value

If (strFilterCellValue.Contains("*") Or strFilterCellValue.Contains("[")) Then

Dim lastIndexOfFilterCell As Integer = strFilterCellValue.Count - 1

Dim strNewFilterCellValue As String = strFilterCellValue.Remove(lastIndexOfFilterCell, 1)

grid.ActiveEditor.Value = strNewFilterCellValue

grid.CurrentCell.Editor.BeginEdit()

Return 1

Exit Function

End If

And for Custom filter menu

If (cellValue IsNot Nothing) Then

Dim totalCount As Integer = cellValue.Count

If (cellValue.Contains("*")) Then

Dim indexOfStar As String = cellValue.IndexOf("*")

Dim numOfCharsRemoved As String = totalCount - indexOfStar

Dim strNewFilterCellValue As String = cellValue.Remove(indexOfStar, numOfCharsRemoved)

grid.CurrentCell.Value = strNewFilterCellValue

grid.MasterGridViewTemplate.FilterExpressions.EndItemUpdate()

Return 2

Exit Function

End If

If (cellValue.Contains("[")) Then

Dim indexOfOpenBracket As String = cellValue.IndexOf("[")

Dim numOfCharsRemoved As String = totalCount - indexOfOpenBracket

Dim strNewFilterCellValue As String = cellValue.Remove(indexOfOpenBracket, numOfCharsRemoved)

grid.CurrentCell.Value = strNewFilterCellValue

grid.MasterGridViewTemplate.FilterExpressions.EndItemUpdate()

Return 2

Exit Function

End If

The issue is I m unable to validate both together that is for custom filter option & while the user enters in the filter cell

Thanks,

Julian

GridView

answered on 10 Jan 2011

2 answers

119 views

How to change back color for each appointment object

Hi guy! I have a question about RadScheduler. How can I change back color/Forecolor for each Appointment object in RadScheduler?. For instance, I got 2 object : app1(Appointment object), app2(Appointment object). I want app1 get red color when it show on radScheduler and app2 will get grey color also .

Thanks

Tran Dat

Scheduler and Reminder

answered on 10 Jan 2011

4 answers

149 views

MDI Merging

I've worked with menu merging with the default VS components long enough to be comfortable. I'm now working with RADMenu now but am a bit stuck.

With a MDI parent and MDI child, everything looks like it's merging like I'm used to.

I don't see the same menus merging when I add a RADDock control to the MDI parent and make any of the MDI child forms display as Document Windows. Any ideas what I might be missing or how I can accomplish this merge scenario?

Thanks

:)
jr

Menu

answered on 09 Jan 2011

3 answers

118 views

Hierarchy expanding collapsing event?

Is there an event that is thrown when a gridview is expanded or collapsed via the + or minus - being clicked in the parent row?

I have tried using the event, GroupExpanded but it is not being thrown.

The underlying reason for this is that my entire program has a black background, but when I use the RadGridView and set its DockStyle to Fill, the area not populated by the rows is defaulted to white. I have not been able to change the color of this portion of the control, so I am using a Black panel behind the RadGridView, and dynamically changing the height of the GridView when rows are added via the RowsChanged event.

GridView

answered on 07 Jan 2011

9 answers

560 views

How can I change back color of group panel?

Hi

How can I change back color of group panel?

(This panel wit text: „Drag a column here to group by this column.”)

Regards

GridView

answered on 07 Jan 2011

3 answers

934 views

Column headers in radGridView

Column header texts and sizings are not accepted regardless if they are set through property builder or through columns property. If AutoGenerateColumns is set to true, database column names in default sizing are displayed, if AutoGenerateColumns is set to false, nothing is displayed.

GridView

answered on 07 Jan 2011