Questions on UI for WinForms Forum

2 answers

796 views

Prevent gridview from losing focus if grid validation fails

I have a radGridView on a form which has cell and row validation implemented. No problem with that, works well.

The problem arises when I leave a row incomplete and then click on the Save button elsewhere on the form. The RowValidating code snippet below does not work, because once the focus moves away from the GridView to the Save button, the 'if (row != null)' check always returns false, and the RowValidating code is never executed.

private void radGridView1_RowValidating(object sender, RowValidatingEventArgs e)

{

var row = e.Row as GridViewDataRowInfo;

if (row != null)

{

var value = row.Cells["cboUnit"].Value.ToString();

if (string.IsNullOrEmpty(value))

{

e.Cancel = true;

row.ErrorText = "Unit Number is a required field";

}

else

{

row.ErrorText = string.Empty;

}

How can I retain focus in the grid to ensure that the entire grid validates before allowing the user to leave the grid?

GridView

answered on 21 Feb 2014

2 answers

113 views

Row Details Editing

I see in the examples application that row details can be used for editing.

Specifically, it says "Row Details can also be used for providing a more convenient editing environment for the end user."

I can't find any documentation, examples, videos or posts about this functionality though. Has anyone used this or know where to find information on it?

Thanks.

GridView

answered on 21 Feb 2014

1 answer

148 views

Cell formatting/expression editor

Hello,

I am trying to format a cell. I am returning a Boolean value and instead of displaying a true or false in the cell I want to display a 1 for true and a 0 for false. I have this in the cell formatting event and I have two columns, the first returns the true/false value which I am reading and then displaying the 1,0 in another column. It works fin when the true/false column is visible but when I hide it I do not see the 1,0 in the other column.

Here is what I have:
//Cell formatting for start bit visual indication. The Start column has been hidden.
if (e.CellElement.ColumnInfo.HeaderText == "Start")
{
if ((bool)e.CellElement.RowInfo.Cells["Start"].Value == true)
{
e.CellElement.RowInfo.Cells["StartBit"].Value = "1";
}
else
{
e.CellElement.RowInfo.Cells["StartBit"].Value = "0";
}
}

Can this be done in the expression editor for the true/false column or what is the best way to achieve this.

Thank you,

chom

GridView

answered on 21 Feb 2014

3 answers

134 views

Unable to add page programatically

I am trying to add a page programatically and I am unable to see newly added page.

However, I have noticed the PageIndex is increasing.

The following is the code:

Telerik.WinControls.UI.RadPageViewPage page1= new Telerik.WinControls.UI.RadPageViewPage();

page1.Text = "Search";

RadPageView1.Pages.Add(page1);

What I found is Page1 visible property is set to false.

Can anyone help me on this.

Thanks
Charan.

PageView

answered on 21 Feb 2014

1 answer

89 views

retrieve data from Edit Recurrence

Hi,
i want to know how can i retrieve values of edit recurrence form after i press button ok in edit appointment form
to reflect in radscheduler and save values of recurrence form in sql db

Scheduler and Reminder

answered on 20 Feb 2014

1 answer

238 views

RadRepeatButton not work touchscreen computer

We have a problem about the ‘RadRepeatButton’ on the touchscreen computer. We have tried the ‘repeat button application’ under the ‘buttons’ tab in the ‘Demo Applicaion – RadControls for WinForms Q3 2013’ on Windows 8 but the button works only when we double tap. When we tried the same application on Windows 7 the button works properly as soon as we tap on it. Does the ‘Rad RepeatButton’ not work on Windows 8? Or does this button works when you double tap on it. We think it should operate when you touch it.

The problem we experience occurs only when we tap on the touchscreen. Other than that, when we use the mouse, it operates properly on both operating systems.

What can we do in order to make the rad repeat button operate when we tap and hold on it (not double tap) on Windows 8?

Buttons, RadioButton, CheckBox, etc

answered on 20 Feb 2014

1 answer

144 views

Help with calculated column and query to RadGridView

Hello everyone,

I have a little problem with your calculated columns.
I need to get all calculated cells with value less than 0, but when I iterate to get the values < 0 I get fewer results. I guess is something related to the moment when is refreshed the calculated value.

how can I get the count of cells with value < 0

right now I am making a linq query like this:

grid.Rows.OfType<GridViewDataRowInfo>().Count(x => Convert.ToDouble(x.Cells["columnName"].Value) <= 0);

but I get only 5 results. It seems that the refresh event of the calculated cells is fired when I scroll down, is that correct? can I force the program to calculate all of them?

thanks :)

GridView

answered on 20 Feb 2014

4 answers

102 views

Image in null SelectedValue

Hi i have a problem when i assign null to SelectedValue.

I have pictures in each of the control elements and when changing the value works perfectly. If you do not select anything right also works. The problem is when after having selected a value image, try to allocate a null control and I changed the text but the image remains.

I have tried:

this.DropDownList.SelectedItem = null;

and:

this.DropDownList.SelectedValue = null;

And not working properly.

Thanks, Regards.

DropDownList

answered on 20 Feb 2014

4 answers

421 views

How can I change a RadLabel font? Nothing seems to work.

Hello there :)

First of all, this is my first time using Telerik and I`m loving it so far. :D

I`m trying to change the font size of some labels, and I need to do it runtime, after applying the initial theme. I have tried label.Font = new Font(labelFont.Name, 20f, FontStyle.Regular); and label.LabelElement.Font = new Font(labelFont.Name, 20f, FontStyle.Regular); none of them work. The function does get called, the font does get changed in memory, checked it with a breakpoint. How would I go about this?

Label

answered on 20 Feb 2014

5 answers

536 views

VirtualMode in TreeView

Hi all,

I wondered if it was possible to use a virtual treeview, like in a gridview. There the option VirtualMode indicates that you implement you own data management routines, rather than adding items once... I expect to have a tree view with a lot of items, but I don't want them to be loaded at once (for performance reasons).

Does anyone have and idea?

Regards,
C.

Treeview

answered on 19 Feb 2014