Questions on UI for WinForms Forum

1 answer

145 views

Hi,

I want display two items in the radcombobox one below the other. Id in the first line and address in the next line. And also I am making loading of the combobox OnDemand. How to display the radcombo box items in different lines?

Thanks in advance,
Medac

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 19 Feb 2009

3 answers

214 views

exception: onmousedownright on basegridbehaviour

Hi,

VS2005

WinControls 2008Q3 1204

I get a null pointer exception when right clicking on a grid outside the rows.

I think I found the bug, if I set the selectionmode to cellselect it works fine.

if (this.GridControl.MultiSelect && this.GridControl.SelectionMode == GridViewSelectionMode.FullRowSelect)

{

if (!row.IsSelected)

{

this.GridControl.SelectedRows.Clear();

}

01:05:54:735 10 Exception .... Object reference not set to an instance of an object.

at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDownRight(MouseEventArgs e)

at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDown(MouseEventArgs e)

at Telerik.WinControls.UI.RadGridView.OnMouseDown(MouseEventArgs e)

at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at Telerik.WinControls.RadControl.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)

at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)

My grid:

//

// radGridView

//

this.radGridView.BackColor = System.Drawing.Color.Transparent;

this.radGridView.Cursor = System.Windows.Forms.Cursors.Default;

this.radGridView.Dock = System.Windows.Forms.DockStyle.Fill;

this.radGridView.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);

this.radGridView.ForeColor = System.Drawing.SystemColors.ControlText;

this.radGridView.ImeMode = System.Windows.Forms.ImeMode.NoControl;

this.radGridView.Location = new System.Drawing.Point(0, 0);

this.radGridView.Margin = new System.Windows.Forms.Padding(0);

//

this.radGridView.MasterGridViewTemplate.AllowAddNewRow = false;

this.radGridView.MasterGridViewTemplate.AllowColumnChooser = false;

this.radGridView.MasterGridViewTemplate.AllowColumnReorder = false;

this.radGridView.MasterGridViewTemplate.AllowDragToGroup = false;

this.radGridView.MasterGridViewTemplate.AllowRowResize = false;

this.radGridView.MasterGridViewTemplate.Caption = null;

gridViewTextBoxColumn1.FieldAlias = "FileName";

gridViewTextBoxColumn1.FieldName = "FileName";

gridViewTextBoxColumn1.HeaderText = "Name";

gridViewTextBoxColumn1.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewTextBoxColumn1.UniqueName = "FileName";

gridViewTextBoxColumn1.Width = 160;

gridViewDateTimeColumn1.DataType = typeof(System.DateTime);

gridViewDateTimeColumn1.FieldAlias = "DateCreated";

gridViewDateTimeColumn1.FieldName = "DateCreated";

gridViewDateTimeColumn1.HeaderText = "Date uploaded";

gridViewDateTimeColumn1.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewDateTimeColumn1.SortOrder = Telerik.WinControls.UI.RadSortOrder.Ascending;

gridViewDateTimeColumn1.UniqueName = "DateCreated";

gridViewDateTimeColumn1.Width = 120;

gridViewTextBoxColumn2.FieldAlias = "FileType";

gridViewTextBoxColumn2.FieldName = "FileType";

gridViewTextBoxColumn2.HeaderText = "Type";

gridViewTextBoxColumn2.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewTextBoxColumn2.UniqueName = "FileType";

gridViewTextBoxColumn2.Width = 110;

gridViewTextBoxColumn3.FieldAlias = "FileSize";

gridViewTextBoxColumn3.FieldName = "FileSize";

gridViewTextBoxColumn3.HeaderText = "Size";

gridViewTextBoxColumn3.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewTextBoxColumn3.UniqueName = "FileSize";

gridViewTextBoxColumn3.Width = 100;

this.radGridView.MasterGridViewTemplate.Columns.Add(gridViewTextBoxColumn1);

this.radGridView.MasterGridViewTemplate.Columns.Add(gridViewDateTimeColumn1);

this.radGridView.MasterGridViewTemplate.Columns.Add(gridViewTextBoxColumn2);

this.radGridView.MasterGridViewTemplate.Columns.Add(gridViewTextBoxColumn3);

this.radGridView.MasterGridViewTemplate.EnableGrouping = false;

this.radGridView.MasterGridViewTemplate.ShowRowHeaderColumn = false;

this.radGridView.MultiSelect = true;

this.radGridView.Name = "radGridView";

this.radGridView.ReadOnly = true;

this.radGridView.RightToLeft = System.Windows.Forms.RightToLeft.No;

this.radGridView.ShowGroupPanel = false;

this.radGridView.Size = new System.Drawing.Size(443, 401);

this.radGridView.TabIndex = 0;

this.radGridView.Text = "radGridView";

this.radGridView.ThemeName = "Vista";

((Telerik.WinControls.UI.GridTableElement)(this.radGridView.GetChildAt(0))).CellSpacing = -1;

((Telerik.WinControls.UI.GridTableElement)(this.radGridView.GetChildAt(0))).DrawBorder = false;

((Telerik.WinControls.UI.GridTableElement)(this.radGridView.GetChildAt(0))).BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(255)))), ((int)(((byte)(255)))));

((Telerik.WinControls.UI.GridTableElement)(this.radGridView.GetChildAt(0))).DrawFill = true;

((Telerik.WinControls.UI.GridTableBodyElement)(this.radGridView.GetChildAt(0).GetChildAt(1))).DrawBorder = true;

((Telerik.WinControls.UI.GridTableBodyElement)(this.radGridView.GetChildAt(0).GetChildAt(1))).BackColor = System.Drawing.Color.White;

((Telerik.WinControls.UI.GridTableBodyElement)(this.radGridView.GetChildAt(0).GetChildAt(1))).DrawFill = false;

Question. Can I have the drop down show even if there are no rows in the grid? (add row?)

thanks

-j

GridView

answered on 19 Feb 2009

3 answers

300 views

RadListBox Slow to load

Hello,

I have been using a radlistbox in my form and trying to display image against each record. the problem is that it takes around 7 seconds to display around 2000 records, which is very slow. in one of the article i have read that RadListBox take less than one second to load 2000 records
I am using following lineof code to add the text and image to list.

foreach (string strConnectedItem in arrTemp)

{

RadListBoxItem item = new RadListBoxItem();

if (arrConnectedDLD.Count != 0 && arrConnectedDLD.Contains(strConnectedItem))

{

//arrConnectedDLDinMasterFile.Add(strConnectedItem);

////RadListBoxItem item = new RadListBoxItem();

item.Text = strConnectedItem;

item.Image = imageListLB.Images[1]; ;

item.Value = strConnectedItem;

arrDLDList.Add(strConnectedItem +

"." + "1");

radLbDLD.Items.Add(item);

radCbDLD.Items.Add(

new RadComboBoxItem(strConnectedItem, strConnectedItem));

}

else

{

// arrNotConnectedDLD.Add(strConnectedItem);

//RadListBoxItem item = new RadListBoxItem();

item.Text = strConnectedItem;

item.Image = imageListLB.Images[0];

item.Value = strConnectedItem;

arrDLDList.Add(strConnectedItem +

"." + "0");

radLbDLD.Items.Add(item);

radCbDLD.Items.Add(

new RadComboBoxItem(strConnectedItem, strConnectedItem));

}

item.BorderThickness =

new System.Windows.Forms.Padding(1);

item.CanFocus =

true;

//item.Margin = new System.Windows.Forms.Padding(15, 0, 0, 0);

item.TextImageRelation = System.Windows.Forms.

TextImageRelation.ImageBeforeText;

item.TextSeparatorVisibility = Telerik.WinControls.

ElementVisibility.Visible;

}

if is remove the above code and instead use

radLbDLD.DataSource = arrDLDList;

then the loading time is reduced but inage is not displayed.
as per my understanding the most of the time is taken in adding item to list on by one.
is there any way by which I can avoid this looping.

Also I could not find any property in RadListBox equivalent to ListBox.Items[n].ImageIndex in .net controls
please suggest what can be done to improve the performance.

Thanks & Regards,
Vijay Chowdhary

Calendar, DateTimePicker, TimePicker and Clock

answered on 19 Feb 2009

1 answer

97 views

VSB & Themes in Windows Mobile?

Hi,

I am really looking forward to trying out the Telerik Winforms controls they look amazing..

I was wondering if the skinning or theming that I have seen on the demos can be deployed on Windows Mobile devices? Are there any other ways of skinning Win Forms applications so they don't look like they were made in 1995?

Thanks in advance..

Mark

Themes and Visual Style Builder

answered on 19 Feb 2009

1 answer

237 views

Nodes.Find problem

Hi, I have a problem with method Find in RadTreeView.Nodes

The problem is that the function Find don't match nodes.

In the next example I do three research use these proprerty :
- Key
- Tag
- Text

But the results (Count1,Count2 and Count3) are all 0.

I don't understand.

RadTreeView rad = new RadTreeView();

RadTreeNode node = new RadTreeNode();

node.Key =

"1";

node.Tag =

"2";

node.Text =

"3";

rad.Nodes.Add(node);

RadTreeNode[] nodes1 = rad.Nodes.Find("1", true);

RadTreeNode[] nodes2 = rad.Nodes.Find("2", true);

RadTreeNode[] nodes3 = rad.Nodes.Find("3", true);

int count1 = nodes1.Length;

int count2 = nodes2.Length;

int count3 = nodes3.Length;

Treeview

answered on 19 Feb 2009

3 answers

307 views

[Solved] RadGridView CreateRow event doesn´t fire always

Hello,

I have strange problem with RadGridView.I am programatically binding data from strongly typed DataSet.The data bound to the RadGridView depends on what has user clicked in main menu.Everything works fine except the CreateRow event fires only when two from several tables from DataSet are bound to the control.I am not able to find any reason for that.Could You please give me some help?

RowsChanged event works fine.

GridView

answered on 18 Feb 2009

1 answer

148 views

Sorting Problem

Hi,

We are running with Q2 2008 edition at present and I am experiencing a sorting issue. I am binding to a List<T> which contains a date field that I want to sort in a descending direction. The sort actually works fine and the most recent dates are at the top of the grid. My problem however is that the current row remains at the bottom of the grid e.g. on the row containing the oldest date and that results in my grid when rendered being scrolled all the way to the bottom. Does anybody have any answers? Is this something that was an issue in Q2 2008?

Regards,

Mark

radGridViewSpreadData.MasterGridViewTemplate.AutoGenerateColumns = false;

radGridViewSpreadData.MasterGridViewTemplate.SortExpressions.Clear();

radGridViewSpreadData.MasterGridViewTemplate.SortExpressions.Add(new GridSortField("Date", RadSortOrder.Descending));

radGridViewSpreadData.DataSource = this.Spread;

GridView

answered on 18 Feb 2009

3 answers

220 views

Finding Row by Text o by Value

hi!!

I need to know how can I do in RadMultiColumnComboBox to Find a row by text (displaymember) or by value (valuemember) for next selecting it , and can you help me with an example?

thanks

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 18 Feb 2009

3 answers

789 views

How to Show a default value in GridViewlookUpColumn for windows applications

Dear All,

I am using Telerik Q3 controls.

May i know how to show a default value in the radgridview LookUpcolumn when the data was binding to that.

Thanks & Regards,
Rajesh

GridView

answered on 18 Feb 2009

3 answers

192 views

Datagrid

Hi

How can I make an extra header line for an existing databound datagridview?
Like grouping.

/Michael

GridView

answered on 18 Feb 2009