Questions on UI for WPF Forum

3 answers

59 views

Clearing databound collection causes cast error

Hi Telerik,

I've recently upgraded to Q1 2010. In my code I have had a radchart bound to an observablecollection. The first display of the chart works fine, however when I use either collection.Clear() or ItemsSource = null I receive the following error:

    
            InvalidCastException  
        
            Unable to cast object of type 'System.Windows.Style' to type 'System.Collections.Generic.IList'1[System.Windows.Style]

This occurs when using a BarSeriesDefinition, however when I use a LineSeriesDefinition it works fine. Also, this used to work previously in both SeriesDefinitions.

Any Ideas?

Rav

Chart

answered on 30 Mar 2010

4 answers

3.0K+ views

Refresh RadGridview in Wpf

WPF and C#: Problem: 1. How to Refresh Radgridview when i Insert,update and Delete Record in database anrecord. 2.when i am Insert or Update Record than in radgridview that row is selected.

i am useing sql server 2005.

i am use to set data source of radgridview like " radgridview1.ItemsSource = ds; " ==> ds is dataset.

i am beginner so if possible than tel me by code it is easy to understand.......

can u help me as early as possible ....

i give some code which i am useing for update RadGridview

    
            con.ConnectionString = @"Data Source=(local);Initial Catalog=DigiDms;Integrated Security=True"; 
        
                    cmd1.Connection = con; 
        
                    con.Open(); 
        
                    cmd1.CommandType = CommandType.StoredProcedure; 
        
                    cmd1.CommandText = "Pro_Insurance_Master_Select"; 
        
                    da1.SelectCommand = cmd1; 
        
                    da1.Fill(ds1); 
        
                    con.Close(); 
        
                    //dataGrid.clear(); 
        
                    //dsGrid.Reset(); 
        
                    //dsGrid = dataGrid.GetData("Pro_Insurance_Master_Select"); //set datasource of gridview 
        
                    gridShowData.ItemsSource = null; // At hear i get Error

                    gridShowData.ItemsSource = ds1;

doing this ,

when i am delete or update record than folloning error generated... Error: >> "Object reference not set to an object"
when i am doing the "gridShowData.ItemsSource = null;"

and when i am doing insert operation than this error is not generated and RadGridview also updated.....

so pls help me as early as possible.... i am beginer ........

GridView

answered on 30 Mar 2010

10 answers

167 views

Persist Item Order

I am wondering if this is possible. I am binding a self-referencing table to a treeview. One of the columns is SortOrder. The users have the ability of moving the items in the treeview up and down within a parent node, or moved to another node and up and down in that one. When the user has made all the moves they want and click save, what has to be saved then is what order the nodes are in under each node. So for example it should be saved like:

NFL
- Name: AFC East SortOrder:1
-- Name: Patriots SortOrder:1
-- Name: Jets SortOrder:2
- Name: AFC South SortOrder: 2
-- Name: Colts SortOrder: 1
-- Name: Titans SortOrder: 2

I was thinking of looping through each node and checking maybe the child index and saving that. Not sure if that would work. Ideally, I would love to be able to Bind the SortOrder to like the child index so it would automatically change if it was moved.

TreeView

answered on 30 Mar 2010

5 answers

99 views

Error Upgrading to Q1 2010

( I re-post correctly here my message that I've already posted in the scheduler-section - it was a mistake)

Hi everybody,
I upgraded today my project from Q3-2009 to Q1-2010 and I've found an error opening Windows and UserControl into the VS2008 editor: (i'm on a Windows7 64 bit)

Cannot create instance of 'GenericTheme' defined in assembly 'Microsoft.Windows.Design.Interaction, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Exception has been thrown by the target of an invocation.

In expression Blend it's OK ...

Is it a problem of the new version?
Is there a way to solve it?

thanks in advance
Michele

General Discussions

answered on 30 Mar 2010

1 answer

98 views

Focus displaying text

Is it possible to set focus to the beginning of the ComboBox displaying text? What I want is the result shown at pict2.jpg(attached) instead of the pict1.jpg(also attached). The problem with pict1.jpg is that when I select an item, the focus goes to the end of my string instead of going to start. Does the control support this?

ComboBox

answered on 30 Mar 2010

1 answer

128 views

Custom Chart Side By Side

Can you tell me if this is possible with your chart control. I need to build a geological chart. I have a couple of images, but stratcolumn is more what I am trying to accomplish. Essentially, it is like three or more charts, side by side, all based on the same scale. So you have a Y scale which represents millions of years, then a type of stack chart where you have a series of polygons of different height, width, and colors; then two point charts. But they all act as one unit for zooming, scaling, panning, etc. Each chart would have its own seperate datasource.

In looking at your charts, I see things simliar to the stacked Polygon chart I need, but not exactly. But there can also be gaps as well, Plus, not with Height, Width being variable. The line charts are easy as you have them. It is just a matter of how would I display these three together as almost one chart for zooming purposes, exporting, etc.

Any suggestions or maybe it just can't do it?

Chart

answered on 30 Mar 2010

7 answers

289 views

Win7 64 bits Q1 2010 installation error

When I install the Q1 2010 WPF suite, the first time I start Visual Studio, I get an error. The second time there is no error but the theme's are not installed and it is not possible to use the designerarea. It constantly shows an error that it cant find the theme.

General Discussions

answered on 29 Mar 2010

2 answers

110 views

ShowInsertRow problem/bug

Adding a new row at a Grid has a little bug it seems like, if you use the insert row.

How to reproduce it:
- Set ShowInsertRow="True" at the RadGridView
- Start setting some values at the row (don't add the data by pressing enter or reaching the end of line!)
- Click somewhere else eg. another row.
- Try to finish adding the data
- The row won't disappear and let you add another row

The important step is that you leave the insert row before the data gets added by pressing somewhere else.

GridView

answered on 29 Mar 2010

1 answer

159 views

Memory profiling

I have tried the following products with Visual Studio 2010 for memory and performance profiling with WPF.

JetBrains dotTrace 3.1
red-gate Ants Memory Profiler 5

Both have crashed and have not allowed me to actually get snapshots of the memory to determine if me and my dev team are releasing all events and references.

Does anyone have any experience with products that work well for memory profiling?

Thanks,
Ron

General Discussions

answered on 29 Mar 2010

2 answers

110 views

Negative-Position Monitor Issue

I described the issue in this blog post.
http://markjerde.blogspot.com/2010/03/radwindow-multimonitor-issue.html

Live Writer makes it so easy to put screenshots & text together. ;-)

Mark

Window

answered on 29 Mar 2010