Questions on UI for WinForms Forum

3 answers

145 views

Expand Icons are not displayed when the TreeView is opened in a VB6 form

I have a treeview that is using the Office 2010 Black theme, and the expand icons in the treeview always display in a .NET form, but if the same control is opened in a VB6 form, the expand icons do not display. Everything else in the treeview seems to work fine. Have you seen this before?

Treeview

answered on 10 Jan 2014

3 answers

325 views

PageIndexChanging not firing

I need to detect when the user changes pages by clicking on a tab. If certain conditions are not met, then I want to programmatically cancel the change. I see two events that might allow me to do this.

PageIndexChanging provides a CurrentIndex, NewIndex and Cancel properties. This would seem to do what I want but it does not fire when a page tab is clicked with a mouse.

SelectedPageChanging event does fire when the user clicks on a page tab. However, it does not contain a CurrentIndex, NewIndex or Cancel property. It does not seem to meet my needs.

What event should I use to detect when a user changes page tabs with a mouse and gives me programmatic control over the change?

thanks,
pat

PageView

answered on 10 Jan 2014

4 answers

291 views

[Solved] Checkboxcolumn checked conditional formatting at runtime

I have a grid with a role that formats the row in red if a specific decimalcolumn "Balance", calculated at grid initialization, contains a value that is less than 0. This rule is working fine.

private void radGridView1_Initialized(object sender, EventArgs e)

{

radGridView1.Columns["Balance"].Expression = "Paid-Due+Expenses";

}

In particular situations I need to override the above rule manually and to do so I have added a checkboxcolumn bound to the db and I am trying to add a new conditional rule which make the row green if the checkbox is checked. Obviously the status change of the checkboxcolumn happens at runtime.
I have tried in several ways but I cannot get it functional.
How can I change the formatting of the row (to green) at runtime if the checkbox is checked?

GridView

answered on 09 Jan 2014

1 answer

164 views

Failing to display items programatically added to a ListView that has columns

I'm sure I'm doing something wrong here, but I followed the documentation and it still doesn't seem to be working. All I get is a blank item in my ListView. Here's the code to recreate my issue. The columns I've added to the control at design-time are named exactly what they indicate below.

private void LoadFiles(DirectoryInfo dir)

{

FileInfo[] files = dir.GetFiles();

this.lvFiles.Items.Clear();

this.lvFiles.Items.BeginUpdate();

foreach (FileInfo file in files)

{

Telerik.WinControls.UI.ListViewDataItem listItem = new Telerik.WinControls.UI.ListViewDataItem();

this.lvFiles.Items.Add(listItem);

listItem["Name"] = file.Name;

listItem["DateTime"] = file.LastWriteTime.ToString();

listItem["Type"] = "file";

listItem["Size"] = UtilLib.FileIO.ToByteString(file.Length);

listItem["Uploaded By"] = "Wango";

listItem.Tag = file;

}

this.lvFiles.Items.EndUpdate();

}

ListView

answered on 09 Jan 2014

1 answer

94 views

Tooltips for items in the CommandBar do not display in a VB6 form

I have a CommandBar that always displays tooltips when opened from a .NET form, but when the control containing the CommandBar is used in a VB6 form, the tooltips do not display. Have you seen this before?

CommandBar

answered on 09 Jan 2014

2 answers

163 views

Timeline Current Time Color

How I can change the current time color?

Scheduler and Reminder

answered on 09 Jan 2014

2 answers

211 views

[Solved] Subtract date

I need to subtract two date from dateTimeColumns.

I tried in the designer:
DATEDIFFDAY(Periodo, Data_Pagam), in the designer

I tried with the code:

radGridView1.Columns["Ritardo"].Expression = "Periodo-Data_Pagam";

I keep getting this error:
Invalid Expression:
"Cannot perform '-' operation on System.DateTime and System.DateTime

Please help.

GridView

answered on 09 Jan 2014

1 answer

166 views

[Solved] MDI Parent Form - Sample Code

I was looking at the Q2 2013 WinForms Controls demo. In the demo I liked the 'DOCK MDI Parent Form' sample. Where Can I download the sample code for this project?

See attached screen print.

Thanks

Dock

answered on 08 Jan 2014

1 answer

129 views

How to print report on client system without showing the report

Hi
i am working asp.net project with c# and i want to print the report or show as PDF to the client. report have Two parameters.
can any body help me in this how to do it.

Thanks

General Discussions

answered on 08 Jan 2014

3 answers

170 views

[Solved] Set GridviewComboBox to Null

Is it possible to set a combobox column to null? I currently have the following shell of code:

private void RadGV_Records_KeyDown(object sender, KeyEventArgs e)
{
if (RadGV_Records.CurrentColumn.GetType().ToString() == "Telerik.WinControls.UI.GridViewComboBoxColumn")
{
if (e.KeyCode == Keys.Delete)
{

}
}
}

Inside the "if (e.KeyCode == Keys.Delete)", I want to set the current combobox value to null or empty, like it is before the user selects anything from the box.

GridView

answered on 08 Jan 2014