I  have two problems occcurring in RadGriedView that has GriedViewComboboxCollumn as columns. Here there are:

1 . Creating Data: I set AutoGenerateColumns Property as false and I add two columns by a method (AddColumns) at runtime, each one column is a GridViewComboBoxColumn, defining their ValueMember = ID and DisplayMember = Name, then set datasource of first column, the second column datasource is set based on the select value of the first column. The second column datasource shows the items correctly, but when I select one item of combobox the grid display the ValueMember not the DisplayMember. Why ?


2. After creating Data (even not displaying the correct value), I save the datasource of grid in a IList and clean the gridview. Then I load this IList again in gridview, when I try to edit the value of the second column, the VS shows the message in the picture errortelerik.jpg. Thus, I cannot edit the row or add new row in the gridview.
How Can I handle this error? I already add the radGridView1_DataError event, but not solve the problem, I still not be able to edit the grid.



The code is here. What am I doing wrong?

Thanks.

Hi,

I have project that need to plot a S-N chart where X-axis is logarithmic scale, see attached image.

I see that I can use scatter chart to archive the result, however needs to swape x-axis and y-axis (where y become x and x become y).  anyone know is it possible to swape x-axis and y-axis or do when will RadChart support logarithmic scale on X-axis?

Thank you.

We have upgraded our Telerik controls from ‘Q3 2007 SP1’ to ‘Q3 2008 SP2’.

 

I am facing some issues while using this newer version:

 

1. On Calendar control I don’t want day selections. Only date selections should be allowed. When we disable days, obviously they appear deactivated (with grey background). Please suggest some solution to make it appear similar to dates (with white background).

 

2. Datetimepickers are allowing null values. User can select whole date and can just delete it. User should not allowed to edit the date values but should not be allowed to delete all contents.

 

3. One more issue is regarding theme of raddropdownbutton. I want a theme with transparent background, when I tried to create it, there appears a slight white outline which is not required. How can i remove this white outline.

1:
In Q2 2010 there is no Method like EvaluateAggregate in SummaryItem. I need this method to implement SummaryAggregates like Sum / 4.0.

How can i implement this feature in Q2 ?

2:
Now i see ColumnIndexChanging is obsolete. I need column reordering only for columns with index > 3 for Example. How do i implement this now? --> Solved: Using Columns.CollectionChanging
Edit:
CollectionChanging/Changed solved not the problem. These events are fired 2 times for 1 column reordering (remove and add). in these events i dont see the new or the old index at the same time. Any solutions?

3:
How do i pin a SummaryItem?

4:
GridViewSummaryItem is not working anymore.

Example:

GridViewDataColumn column = new GridViewDecimalColumn("880", "880");
column.FormatString = "{0:N2}";
GridViewSummaryItem summaryItem = new GridViewSummaryItem(column.UniqueName, column.FormatString, GridAggregateFunction.Sum);
this.summaryRow.Add(summaryItem);

The Summary with 96 rows is 96 * 880. Min or Max is 880.

What is wrong here?

Hello All

I want to ask how can Multi column combo can be embeded inside the grid.

Thanks & regards
Neha Bharti

I want to have my grid them my cells in read-only columns to use a different foreground color.  I was able to set this up in my theme using the IsReadOnly property of GridCellElement:


Then in the view cell formatting event, I added code to set each cell's IsReadOnly to match that of its column:

e.CellElement.IsReadOnly = e.CellElement.ColumnInfo.ReadOnly;

All of this works fine, but I get warnings that GridCellElement.IsReadOnly is obsolete.  Is there another property I should be using to set this up in my theme?  IsReadOnly seemed the best option in the visual style builder.

Thanks,
Rachel

I wish to have a form with a gridview on one side and a panel with current record data on the other side (See attached file) so that I can edit data in the gridview or on the panel. Editing works fine, but problems appear on inserting.

Code behind update button is following:

        private void UpdateGridInfo(GridViewRowInfo currentRow)
        {
            if (currentRow == null)
                return;
            DB.Contract rowView = (DB.Contract)currentRow.DataBoundItem;
            if (rowView.ID == 0)
            {
                // insert
                DB.Contract contract = new DB.Contract();
                contract.RadioStationID = ((DB.vRadioStation)bsRadioStations2.Current).acSubject;
                ...
                App.ContractsDAL.DC.Contracts.InsertOnSubmit(contract);
            }
            else
            {
                // edit
                rowView.RadioStationID = ((DB.vRadioStation)bsRadioStations2.Current).acSubject;
                ...
            }
        }

        private void bUpdate_Click(object sender, EventArgs e)
        {
                UpdateGridInfo(gvContracts.CurrentRow);
                App.ContractsDAL.SubmitChanges();
                App.ContractsDAL.RefreshDC();
                bsContracts.DataSource = App.ContractsDAL.Get();
        }

When I click add a new row on the gridview and then edit data on the panel, I get exceptions for NOT NULL columns, foreign keys... when I try to submit changes, for example:
Cannot insert the value NULL into column 'RadioStationID', table 'RadioStations.dbo.Contracts'; column does not allow nulls. INSERT fails.
The statement has been terminated.

If I debug program, I see that contract.RadioStationID is set to correct value. At first it seems, that gridview automatically posts NULL values, but if I set columns to Nullable and delete relationships from database, everything works as it is supposed to.

How could I make this work without setting columns to Nullable and removing relationships?

I have implemented an export routine using the RadGridView control.

It seemed to be working okay until Q22010.

Here is my structure:

I have a master template with two child templates. I want to read a row from the master and then read all rows from one child template and then read all the rows of the second child template. Both child templates are children of the master. I am referring to the child templates by index. One template caption is 'MVA' (index 0) and the other is 'P' (index 1). Let's assume there is only 1 of each.

Here is what happens:

if I have the 'MVA' tab selected and then export the MVA template is output twice and no 'P' template is output. However, if I have the 'P' tab selected the two 'P' records are output and no 'MVA'.

It looks as if I need to programmatically select first the 'MVA' tab and output the rows and then select the 'P' tab and output the rows.

I can't seem to reference the two sets of child rows directly.

Hello Telerik,

I am looking into the just released Demo of Winforms UI components Q2 2010. On a fresh Windows XP setup (all windows updates installed) the provided demo application shows in Gridview  / Spreadsheet a simple undhandeld exception because "System.ArgumentException: Font 'Calibri' cannot be found." A quick search seems to indicate that Calibri is a font that came new with Vista and can be installed on XP by downloading and installing the MS PowerPoint Viewer 2007.

Maybe you want to fix this in future releases to provide the best possible first impression of your great components.

Regards,
Ralf