Questions on UI for WinForms Forum

5 answers

1.4K+ views

I have just realized that at CellValidating event e.row.DataBoundItem is allways null.
In Q1 2010 when I added a new row into the grid using add row, e.row.DataBoundItem wasn't null and contained a new entity with part filled properties.
Now my application fires many exceptions....

Is it a bug or feature?

GridView

answered on 10 Aug 2010

1 answer

355 views

Difficulty Inserting row using tableadapter

I have a radgridview on a winform that is bound to a tableadapter.

I have the following code in the CellEndEdit Event:

private void grdPeople_CellEndEdit(object sender, GridViewCellEventArgs e)

{

try

{

this.Validate();

this.peopleBindingSource.EndEdit();

this.peopleTableAdapter.Update(peopleDAL);

}

catch (System.Exception ex)

{

MessageBox.Show("Update failed:"+ex.Message);

}

The problem is when I click the "Click here to Add a New Row" and fill in the row, the Adapter.Update gets called but nothing is inserted into the database when I leave the row. I can step through the code and it steps over the Update, and no error is raised - yet there is no data in the database. If I navigate off of the row, then navigate BACK to the row and update it, then the
INSERT command is fired cause I can see it in the database when I do a trace.

So what I need to know is where is the right place to put a call to the Adapter.Insert Method? I don't know what event to use.

I know I can create a new set of textboxes and checkboxes tro mimic my record and have a "Click to INsert" button with some code behind that, but I want to use the default functionality of the RadGrid.

Having said that - what is the recommended way to bind radGridViews to a SQL database? I use TableAdapters because I come from an ASP .NET background and they work well there - but is there a better way to do it in Winforms? Should I be using LINQ?

GridView

answered on 10 Aug 2010

3 answers

176 views

Listbox Floating On Scroll 2 ????

Hi,
there are attached files
So I have this problems with RadListBox - floating on scroll? i try to fix it with position:relative, but the problem still exist
radgridBug.jpg

My code is looking like that

<Content id=".." contentplaceholderid="">
<DIV>
     <div>
       <RADGRID IS HERE>
    </div>
    <div>
       <RadListBox 1>
         <RadListBox 2>
    </div>
<DIV>
</Content>

So if i put position:relative - to the main DIV - than my RADGRID is floating - radgridBug2.jpg

So is there some way to solve this issue- I google it and so many people had been crushed with this problem...

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 10 Aug 2010

6 answers

429 views

rad chart problem

i'm using rad chart , but a run time error appears
Unexpected error has occured.please review the inner exception for more information to solve the problem.
INNER EXCEPTION as follow:
Object reference not set to an instance of an object.

SOURCE:
Telerik.wincontrols.radchart
What is the problem and how to solve it?

Chart (obsolete as of Q1 2013)

answered on 10 Aug 2010

1 answer

863 views

Cancel Adding of new row

Hello,

We have a GridView bound to a BindingLIst of custom business objects. The customer has very strict data validation requirements and doesn't want a new row to be added to the data source until the data is clean, so we have implemented RowValidating and perform validations there for both the 'new' row and existing rows. This works well.

The problem is that if a user decides against adding the row, they can't simply click out of the row, they would either have to finish the row entry and then delete the row, or close out of the form and then return to it. These are not elegant solutions. We wish to provide a Cancel button that will simply discard all changes made to the row, be it a 'new' row or an existing row. How can we accomplish this?

Thanks

GridView

answered on 10 Aug 2010

6 answers

248 views

RadPageView in place of documentwindow in RAd dock.

Hello All

Please guide me how can RadPageView can be used instead of Tabbed Document Window in Rad dock.

Thanks & regards
Neha

Dock

answered on 09 Aug 2010

0 answers

87 views

Handling (Expression Filter Exception) of Runtime user Filtering

_Repeated Thread, sorry_
Would you remove it please?

GridView

asked on 09 Aug 2010

1 answer

141 views

How to unpin all current rows?

Hello,

Please how can i unpin all currently pinned gridview rows?

GridView

answered on 09 Aug 2010

5 answers

177 views

Winform controls disappearing from toolbox - Q2 2010 & vs.net 2010

I had the controls in the toolbox. Then, attempting to create a test project for RadGridView, opening the property builder and clicking on the Build button on the top, VS2010 crashed. When it restarted, the toolbox no longer has RadControls.

BTW, I was not sure what the Build button was for, I just clicked it to see if my column names would appear in the Grid design view.

Thanks,
Gary Davis

General Discussions

answered on 09 Aug 2010

1 answer

147 views

[Solved] cell formating

Hi !

I tried to follow the example for cell formating from your tutorial but this functions is not working

Private Sub radGridView1_CellFormatting(sender As Object, e As Telerik.WinControls.UI.CellFormattingEventArgs)
If e.CellElement.ColumnInfo.HeaderText = "column2" Then
  If e.CellElement.Text = "H" Then
   e.CellElement.RowInfo.Cells("column1").CellElement.ForeColor = Color.Red
  Else
   e.CellElement.RowInfo.Cells("column1").CellElement.ForeColor = Color.Black
  End If
End If
End Sub

e.CellElement.RowInfo.Cells(0) doesn't have any CellElement property !

How I can access another cell from another column in order to change the colour?

Regards,
Hans

GridView

answered on 09 Aug 2010