Questions on UI for WinForms Forum

2 answers

171 views

Hello, i have some tables with something like 1GB data and 2M records, i have a very efficient ibindinglistview implementation to cache few data locally, so i download from DB server only few rows.

It is possible to use the integrated grid UI to set the Filter expression on my IBindingListView to reload the local cache or do i have to hide the integrated filter UI and add some filter textbox outside the grid?

Best regards.

GridView

answered on 10 Jun 2014

6 answers

591 views

Assigning datasource and SelectedIndexChanged event

Hi, at last I am delving into the Winforms controls for the first time, but I am coming up against some strange behaviour when manually binding a RadComboBox to a datasource.

Here is the code called from form_load:

    
            protected void PopulateDropDown()  
        
            {  
        
            DataTable topics = osa.GetAllTopicsForExistingAssessmentsDT();  
        
            radComboBox1.DataSource = topics;  
        
            radComboBox1.DisplayMember = topics.Columns["topictext"].ColumnName;  
        
            radComboBox1.ValueMember = topics.Columns["topicID"].ColumnName;  
        
            }

The datasource is simply a DataTable returned from a webservice.

The issue I have is the when DisplayMember is set, the radComboBox1_SelectedIndexChanged event fires twice and then once again when ValueMember is set. Why is this?

Regards,
Jonathan

Regards,
Jonathan

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 09 Jun 2014

3 answers

532 views

Refreshing Child Rows

I have a grid that displays a parent-child relationship nicely. The user can select a record and edit it if they choose. When they do, before the user is returned control of the form, I grab the underlying DataSource, find the record the user just edited, and update it to reflect their changes. It's faster than refreshing the entire DataSource.

Like so:

// select the existing item

List<Classes.ContractItem> currentContractItems = (List<Classes.ContractItem>)this.dgList.DataSource;

int index = currentContractItems.FindIndex(c => c.ContractItemId == this.CurrentContractItemId);

if (index != -1)

{

currentContractItems.RemoveAt(index);

currentContractItems.Insert(index, this.CurrentContractItem);

}

else

currentContractItems.Add(this.CurrentContractItem);

this.dgList.DataSource = currentContractItems;

This works perfectly for the parent. My problem is refreshing the child rows of the record being updated. this.CurrentContractItem has a List<T> property that contains all the child records, and they are already updated and ready in the above code. So there is something additional I need to do to get the grid to refresh it's child rows.

I've tried several things, reviewed and tried several posts that I found on here. Most were ancient and needed translation from obsolete methods and properties, but I tried them anyway.

What can I do to get the child rows to refresh themselves when the underlying DataSource has changed?

The RadGrid has a Template

GridView

answered on 09 Jun 2014

1 answer

208 views

Coloring scrollbar

Hi,

I have a RadScrollablePanel and I'm trying to figure out how to color the vertical scrollbar through code and not by setting a theme. Can you tell me how to do that?

ScrollablePanel

answered on 09 Jun 2014

1 answer

165 views

RadMarkupDialog and SpellCheck

Hi all,
I am currently using the RadMarkupDialog to enable HTML markup on a column in a RadGridView.
I would like to enable spell check on the entered text somehow but cannot seem to see how to do this.

The code I am using to display the dialog and set the text is

Dim dialog As New RadMarkupDialog()
dialog.DefaultFont = RadGridView1.Font
dialog.Editor.RibbonBar.CommandTabs(1).Enabled = False
dialog.Editor.HyperlinkButton.Enabled = False
dialog.Value = RadGridView1.CurrentCell.Text
Dim result As DialogResult = dialog.ShowDialog()
If result = DialogResult.OK Then
Me.RadGridView1.CurrentCell.Value = dialog.Value
Else
End If

Any ideas on how to do this?

TextBox

answered on 09 Jun 2014

1 answer

169 views

Visual Studio 2012 C# WinForms Theme

Visual Studio 2012 C # WinForm help please contact Do you want to change how can I do?

Themes and Visual Style Builder

answered on 09 Jun 2014

3 answers

216 views

[Solved] Home/back Metro Style Button

Hi,

I'm very new to telerik
on a demo there a home/back circle button (metru UI style) left top corner
where that is coming from
is it possible to add that button on winforms ??
or its just normal button with an image ??

actually i'm also looking for all metro style component for winforms
such tile menu
am i on the right line ??

thank you

Bryan
win7
vbnet2010
vbnet (just migratd)
telerik q3 2013 devcraft

Buttons, RadioButton, CheckBox, etc

answered on 09 Jun 2014

3 answers

257 views

Extra button(s) next to the dropdown arrow

Hi,

Is it possible to add extra buttons next to the Arrow-dropdown button?
I want to add two buttons with their own events etc.

DropDownList

answered on 09 Jun 2014

1 answer

66 views

Application of filter causes an error

Hello,

I have used a Telerik gridview in my winform. I have enabled paging & filter for the grid by default. After successful data binding with grid, when I apply filter to any column i.e select any specific option or specify specific condition than I get an un-handled exception. Please review the below steps for bug reproduction.

1-Page-1.png
2-Page-2.png
3-Page-2-(Select-filter).png
4-Page-2-error.png

Please help to figure out this problem.

Thanking you.

GridView

answered on 09 Jun 2014

2 answers

218 views

How to programmatically populate a multicolumn combobox

I am trying to programmatically populate a multicolumn combobox after user selected another customer from the previous combo box
this is the sample of the code.

01.private void RadMultiColumnComboBox3SelectedIndexChanged(object sender, EventArgs e)

02. {

03. string a;

04. a = string.Format("{0}", radMultiColumnComboBox3.EditorControl.Rows[radMultiColumnComboBox3.SelectedIndex].Cells["customerID"].Value);

05. Int32 b;

06. Int32.TryParse(a, out b);

07. radMultiColumnComboBox4.Enabled = true;

08. OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/RoadRunnerDB.mdb");

09. string cmdStr = string.Format("Select * FROM addressList WHERE customerID = {0}", b);

10.

11. try

12. {