Hi,
I am using check box column to select row.
In fact when the check box is selected, I am storing the DataBondItem of checked row in an Arraylist.

The constraint here is, at a time only one check box has to be checked.
When the next row is checked. The privious check box should be unchecked.

The above is the total functionality.

I am using, BeginEdit and ActiveEditorValuechanged event to perform the above functionality.

The problem here is I am getting 'Object Reference Error' once in a while.

Can anybody suggest better way to obtain the above functionality ?

Current Code for reference :

 void radGrid_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
        {
            currentRowIndex = e.RowIndex;
            CurrentRowDataItem = this.radGrid.Rows[e.RowIndex].DataBoundItem;

            try
            {
                CurrentRowDataItem = this.radGrid.Rows[e.RowIndex].DataBoundItem;
                if (radGrid.Columns[e.ColumnIndex] is GridViewCheckBoxColumn)
                {
                    //When the editor is clicked properly
                    if (radGrid.ActiveEditor != null && radGrid.ActiveEditor.Value != null)
                    {
                        //create handler for active Editor
                        radGrid.ActiveEditor.ValueChanged += new EventHandler(ActiveEditor_ValueChanged);
                    }
                }
            }
            catch { }
        }

        void ActiveEditor_ValueChanged(object sender, EventArgs e)
        {
            //Only when the value is not null
            if (radGrid.ActiveEditor != null && radGrid.ActiveEditor.Value != null)
            {
                //remove the handler, because next time when the editor is clicked new handler wil be created
                radGrid.ActiveEditor.ValueChanged -= new EventHandler(ActiveEditor_ValueChanged);
                try
                {
                    //Here check the any row's check box selected in the Grid or not.
                    if (this.selectedRows != null && radGrid.ActiveEditor != null)
                    {
                        //current data item
                        object item = radGrid.CurrentRow.DataBoundItem;

                        if (radGrid.ActiveEditor.Value.ToString().ToLower() == "true")
                        {
                            this.selectedRows.Clear();
                            this.selectedRows.Add(item);

                            if (PreviousRowDataItem == null || previousCheck == -1)
                            {
                                //previousCheck = currentRowIndex;
                                PreviousRowDataItem = this.radGrid.CurrentRow.DataBoundItem;
                            }
                            
                            //set current index of previously selected row. It has to be checked and set because while sorting index may change
                            previousCheck = GetActualCheck(PreviousRowDataItem);

                            //Uncheck the previously selected
                            if (previousCheck != -1)
                            {
                                //set false if its true
                                if (radGrid.Rows[previousCheck].Cells[0].Value.ToString().ToLower() == "true")
                                {
                                    radGrid.Rows[previousCheck].Cells[0].Value = Boolean.FalseString;
                                }
                            }
                            //change the previous rowdata to current dataitem
                            if (currentRowIndex != -1)
                            {
                                PreviousRowDataItem = this.radGrid.CurrentRow.DataBoundItem;
                            }

                            if (OnSelectionChange != null)
                            {
                                OnSelectionChange();
                            }
                        }
                        //if uncheck clear the selected rows
                        else
                        {
                            this.selectedRows.Clear();
                        }

                        //if the Edit is finished, have to call this Default function otherwise the edit should not be commited
                        bool b = radGrid.EndEdit();
                    }
                }
                catch (Exception ex)
                {
                    Nexus.UI.BaseMdiParent.RaiseException(this, ex);
                }
            }
        }

Telerik has by far the best HTML editor on the market for ASP and as was noted by Telerik, its one of the best selling products that Telerik has. This begs the question - why is there not something similar provided by Telerik for WinForms? We are having to look at other companies to provide that functionality and the ones that are rich enough are not compatible in look and feel with Telerik. Tools like TXTextControl are very rich, but it would be good to see this kind of support in the Telerik suite to complete the offering - its a bit of a gaping hole.

Also, while the basic HTML-Like support is useful in things like the grid, it would be even more useful with just a few more formatting features such as Background-Color (so you could highlight a section of the text with a yellow background for example) or strikethrough (so you could show edits where a section of text was deleted). We are trying to mirror our web product which the Telerik Grid allows us to do and again are having to resort to third party alternatives.

Alternatively Rich Text would be an option in either case - the key is to be able to display the data with a few more options.

Are there any plans for either?

Hello,

I want to disable to modify the checkBox in the gridView. I make AllowEditRow à false but the user can always modify the checkBox.

Thanks in advance.

Hello Telerik,

hi all
i use radMDI form and show a radchild form
in radchild form i use a rad grid
i want rad grid clicked will show a dialog form and when the dialog form close will refresh gird in parent form
anybody help me
thanks

I'm trying to highlight my group rows in a grid based on their aggregate values. For example I have values for Max and Current, and depending on the percentage of values I would like to highlight the group header yellow/red/violet/green as appropriate. The attached code soomewhat works except it highlights the entire grid green, any help you can provide. (This is in the GroupSumaryEvaluate event.

Hi, I am trying to set Focus on the GridView Filtering box when F2 Key is pressed.

Any idea ?

regards

when i click a row in grid, i want to show dialog to addnew or edit form.
how i do? please help me
sorry i am newbie
thanks all

Hi

Please look on this URL (http://65.57.255.33/GridViewWithHeader.JPG)
I need to group only column header like this. I am Rad Control Win Form (Q2 2009).
Please help me.

Regards
Atul Kumar Srivastav

I can set the parent TableHeaderHeight for a RadGridView no problem...

((GridTableElement)this.radGridView1.GridElement).TableHeaderHeight = 20;

However I need to set the Header height on the related GridViewTemplate.
How can this be done programmatically?