Questions on UI for WinForms Forum

3 answers

162 views

How to restrict user from entering text which is not in a display member of combobox items (2)

Hello, I'm using the first solution you propose on http://www.telerik.com/community/forums/winforms/combobox/how-to-restrict-user-from-entering-text-which-is-not-in-a-display-member-of-combobox-items.aspx and works fine.

I did a little change and the event handler looks like this:

void cbNameElement_TextChanging(object sender, Telerik.WinControls.TextChangingEventArgs e)

{

if (!e.NewValue.Equals(string.Empty))

{

if (cbName.FindItem(e.NewValue) == null)

{

this.cbName.Text = string.Empty;

}

What I accomplished with this is that if the user writes something that is not in the list the text of the combobox is cleared.

Now I have a problem. You clear the text, then you hit ENTER, and you write something that is not on the list, that text isn't cleared.

Please help me with this.

Thanks in advance.

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 15 Jun 2011

3 answers

793 views

Exception has been thrown by the target of an invocation.

I keep getting this error, sometimes everytime I run the gridview, sometimes it won't throw the error and it will show the results. Here is my code.

    
            Dim DS_Assets As DataSet  
        
            sqlQuery = "SELECT location.location_id, location.site_id, location.description, location.code, location.site_id, " & _  
        
            "asset.asset_tag, asset.serial_number, asset.item_id, asset.date_updated, " & _  
        
            "item.description " & _  
        
            "FROM location INNER JOIN asset ON location.location_id = asset.location_id INNER JOIN item ON asset.item_id = item.item_id " & _  
        
            "WHERE location.site_id=" & Site  
        
            DS_Assets = common.DBConnect(sqlQuery, "assets", activeDBServer, activeDBName, activeDBUser, activeDBPass) ' This is the function that returns the Dataset  
        
            Me.RadGridView1.MasterGridViewTemplate.Columns.Clear()  
        
            Me.RadGridView1.MasterGridViewTemplate.GroupByExpressions.Clear()  
        
            Me.RadGridView1.MasterGridViewTemplate.SortExpressions.Clear()  
        
            Me.RadGridView1.MasterGridViewTemplate.AllowAddNewRow = False 
        
            Me.RadGridView1.MasterGridViewTemplate.AutoGenerateColumns = False 
        
            Me.RadGridView1.MasterGridViewTemplate.EnableGrouping = False 
        
            Me.RadGridView1.DataSource = DS_Assets.Tables(0)

The error is thrown on the last line when I try to bind the data to the gridview. There are about 3300 rows in the data being returned. If I look at the inner exception it is returning "NullReferenceException: Object reference not set to an instance of an object."

But the data is there, the Dataset is correct. I have run this code on a regular GridView control and it works fine. Just won't work on the RadGridView. Any ideas what I am doing wrong?

GridView

answered on 15 Jun 2011

1 answer

482 views

Problem in hiding vertical scroll bar

Hello Experts!

I am currently facing a problem while using the Rad Grid View. I want to hide the vertical scroll bar. When i try to set the AutoSize property to true and AutoSizeColumnMode property to fill, then all the columns in the rad grid view disappears. On the other hand if i set AutoSize property to true and AutoSizeColumnMode property to none, the scroll bar disappears but the grid doesn't stretch enough horizontally to fill the parent container. Now can you guys tell me how can i hide vertical scroll bar as well as stretch the column enough to fill the parent?

Thanks...

GridView

answered on 15 Jun 2011

1 answer

207 views

Page View Scaling Issues

I'm going through my C# Windows Form application and making it so upon launching it is in a maximized state. The RadStatusStrip control scales properly, but upon hitting the maximize button the RadPageView control does not scale like all of the other controls, it simply stays the same size I originally configured the form to be.

I am using the Q1 2011 SP1 Release btw.

I attached a screenshot of what I am getting when maximizing the form.

PageView

answered on 15 Jun 2011

12 answers

590 views

How to simulate Autocomplete

I'd like to simulate an autocomplete in my multicolumncomboboxes. I saw on another thread that I could use the textchanged event. If I do that, what is the best way to look up the key column in my data source (which is the text that would be typed in) as starting with whatever the user types in the text box and then, I assume, setting the current row of the data source to the row that matches?

MultiColumn ComboBox

answered on 15 Jun 2011

1 answer

273 views

Radpageview a property to select a page

Hi,
I am using radpageview with outlook mode is there any method by default to focus the current selected page .

In winows i have used a panel in that i have a method by default like SelectPanel() so can anyone explain regarding this .

Thanks
Hema

PageView

answered on 15 Jun 2011

1 answer

178 views

Dynamic menu text

Hi,

I have a CommandBarDropDownButton with several menuitems, several of which I am dynamically changing the text the the CBDropDownButton is clicked. Several of our users are telling us that the text does not change until the second time they click on the CBDropDownButton. I cannot duplicate this on my machine but I have seen it on others. I am handling the click event of the CBDropDownButton and setting the menuitem text there.

is there a better way to do this to ensure the user will see the dynamic menu item text immediately?

CommandBar

answered on 15 Jun 2011

4 answers

163 views

How to use the Gridview as a property editor?

Hello,

i have some properties the user should be able to edit in the configuration of my project.
i would like to create a form with a radGridView similar to the property window of the visualstudio where we edit the properties of a control. So the radGridView should contain 2 columns. The first column contains the names of the properties and the second column contains the values for the properties. The values of the properties could contain different values like text, numeric, enumerations, ..

What would be the best way to create the second column?

Kind Regards,

Ramius

GridView

answered on 15 Jun 2011

1 answer

90 views

GridView custom grouping demo bug?

I was looking at the GridView/ Custom grouping demo in RadControls demo for WinForms. While grouping by Country properly displays a group color, this is not he case if you try grouping by another column. In this case, some group headers will be colored - not necessarily with correct color for country - while others will be not. Scrolling up and down will cause colorings on group headers to be moved.

GridView

answered on 15 Jun 2011

2 answers

100 views

Extra grouping column

Hello,
I've got something strange on my grid, and I don't know where it comes from. Every row in my grid is preceded by something that looks like a grouping "+". If I expand the +, I have an empty line that looks like a separator. Please have a look at my screenshot, since it's quite difficult to explain. I don't know where that comes from, and I want that to go away!

Anyone knows what is wrong?

Thank you!

GridView

answered on 13 Jun 2011