Questions on UI for WinForms Forum

9 answers

523 views

Hi All,

I am trying to set a maximum vertical size to be displayed for a child grid at all times, the vertical scroll bar of the child grid enabled in autohide mode in order to be able to see the rest of the rows. By vertical size I mean how many rows to be displayed at any given time in the child grid, and not the vertical height of each individual row. Unfortunately, although I have tried, I cannot find a reference on how to implement this feature. Any suggestions will be highly appreciated.

Kind Regards,

George

GridView

answered on 12 Nov 2009

1 answer

156 views

Winform Teleric objects initialization slow

Hi,

Having a bit of anxiety attack finding out users are experiencing slow launch times on a Office plugin using Winforms.
Initially I thought is may be due to something I did, but found out it's all in the Telerik object initializations.
The delays are to the point that the solution is not shippable and I'm in a bind unless I can bring these long init times down.
Delays of 6 sec to 30 sec are being reported by many test users.

I put in some code to measure timings, which brought me to my conclusion.
I don't connect up the datasources until later, the long init times are with no data connected. Also I moved all of the ResumeLayout() and performLayout() calls to the end of the InitializeComponent() block.

    
            [debug_timing] = 

            [0s 0m] AddinModule_AddinInitialize_Start 
        
            [0s 31m] AddinModule_AddinInitialize_End 
        
            [0s 0m] Display Form Request - Zeroed 
        
            [0s 0m] InitializeComponent start 
        
            [6s 515m] InitializeComponent end 
        
            [0s 62m] Form Loading 
        
            [0s 0m] Lookup Data Start 
        
            [0s 671m] Lookup Data End 
        
            [1s 718m] Display Form

Put in some more detailed timing calls, and found:

Of this excessive initialization time:
Approx 40% of the time is spent creating the Teleric controls and the BeginInits() , From <<<a>>> to <<<b>>>
Approx 60% pf the time is spent in the Teleric EndInit() calls, From <<c>> to <<<d>>>

    
            private void InitializeComponent() 
        
            { 

            this.SuspendLayout(); 
        
            <<<< a >>>>> 
        
            new Telerik.WinControls.UI....(); 
        
            .. 
        
            .. 
        
            ((System.ComponentModel.ISupportInitialize)....BeginInit(); 
        
            <<<< b >>>>>> 
        
            ... 
        
            setup properties for each forms object 
        
            .. 
        
            <<<<< c >>>>> 
        
            ((System.ComponentModel.ISupportInitialize)....EndInit(); 
        
            <<<<< d >>>>> 
        
            .. 
        
            .. 
        
            Moved all the ResumeLayout() and performLayout() calls here 
        
            }

I love the product, and chose it primarily to provide a UI that is in line with the Office suite. I've noticed other users experiencing similar issues.

Any thing else I can try?

Thanks.
Ron

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 12 Nov 2009

8 answers

423 views

LoadLayout gives NullReferenceException if the gridview is grouped by a DateTime column

I have a problem with the SaveLayout / LoadLayout methods.

If I group my GridView by a DateTime column or a column which has been formatted and then save the layout, I get a null reference exception when I try to load it: "System.NullReferenceException was unhandled by user code
Message="Object reference not set to an instance of an object."

At least it seems to be only when I do the mentioned grouping, but I won't say for sure that it won't happen in other cases as well. In my grid I mostly have Text columns, and the LoadLayout works fine if I group by these.

Is this a bug, or am I doing something wrong?

Regards, Jill-Connie Lorentsen

GridView

answered on 12 Nov 2009

5 answers

143 views

Add Option for Multiple Tabs (GridViewTemplate) at the MasterGridViewTemplate (Root) Level

I'd like to make a "feature request" to add an option to allow multiple Tabs (GridViewTemplates) at the MasterGridViewTemplate (Root) Level. I know this can be done by combining a TabControl or RadTabStrip with separate RadGridViews (or even having a 0-Row "dummy" MasterGridViewTemplate), but adding this feature would make it significantly easier for the developer and end-user.

Telerik WinForms 2009Q3 Beta (2009.2.9.1016) / 2009Q2 (2009.2.9.729), VB, VS 2005 (v8.0.50727.762 SP.050727-7600), .Net 2.0 (2.0.50727), XP SP3, 3GB, 2.99GHZ, Core2Duo.

GridView

answered on 12 Nov 2009

0 answers

165 views

How to clear Radcombobox in q3

Radcombobox.Items.Clear();

Collection can not be cleared while the control is data bound. Clear the data source instead or set the DataSource property to null.

anyone can help me...

thanks
vignesh

ComboBox and ListBox (obsolete as of Q2 2010)

asked on 12 Nov 2009

0 answers

197 views

Blank rows apear in GridView

Hi Telerik
i am having issue with RadGridView most of time it works fine but some times when i load gridview it comes with blank rows the number of rows are same as my datatable row count but there is no data in rows

im using datatable to loop grid and add each row one by one

example
RadGridView.Rows.Clear()

for i=0 to dtTable.rows.count-1
RadGridView.Rows.AddNew()
RadGridView.Rows(i).Cells(1).Value ="<value>"
..
next

now most of time it works fine but some time it just shows me blank rows with no data
i was using Q2 2009 now i have updated with Q3 2009 but still same problem

help me please thanks

Kind Regards:
Harinder Singh

GridView

asked on 12 Nov 2009

1 answer

108 views

RadGrid ComboColumn LINQtoSQL Datasource

I am using the following code to set the datasource for combobox Column

((GridViewComboBoxColumn)radGridView1.Columns["Name"]).DataSource = from medicine in db.Medicines
select medicine;
((GridViewComboBoxColumn)radGridView1.Columns["Name"]).DisplayMember = "Name";
((GridViewComboBoxColumn)radGridView1.Columns["Name"]).ValueMember = "ID";

during adding new row in grid, when i click on combo column, following exception throws

but getting the following Exception

"The list must be an IBindingList to AddNew."

a quick response would be highly appreciated

thanks

GridView

answered on 12 Nov 2009

1 answer

228 views

[Solved] Rad Toolstrip Label Forecolor

Hi All,

I am wondering how to programable change the ForeColor of a toolstrip label. The following code does not work.

tslMode.ForeColor = Color.Red

Thanks in advance
Mark

Toolstrip (obsolete as of Q3 2010)

answered on 12 Nov 2009

6 answers

1.6K+ views

Check if a row has changes

I am evaluating RadControls for WinForms, particularly the GridView and so far am impressed. I was wondering though, is there a way to check if a row or cell is dirty, or has been changed? It would be great if I could do this in the CurrentRowChanging event.

GridView

answered on 12 Nov 2009

7 answers

465 views

Conditional Formatting Based on Non-blank Date Values

I'm trying to "Conditionally Format" a Row in a different color whose Date value in a specified Column is equal to a specified value. I added ConditionalFormattingObject using RadGridView.Columns.Item("Date Column's Came").ConditionalFormattingObjectList.Add method. I haven't been able to get it to work with comparison values other than blank.

I know I can always manually implement conditional formatting using the RowFormatting or CellFormatting Events. However, that means the user can't add, edit or delete the formatting (unless you also implement your own Conditional Formats Editor) it and it can't be saved / loaded by SaveLayout / LoadLayout (unless you manually add / remove-interpret it before / after the calls to SaveLayout / LoadLayout ). Getting the ConditionalFormattingObject to support comparing non-blank Date values would still be the ideal solution.

Telerik 2009Q2 (2009.2.9.729), VS 2005 (v8.0.50727.762 SP.050727-7600), XP SP3 on Core2Duo 2.99GHZ with 3GB.

GridView

answered on 11 Nov 2009