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GridView

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answered on 07 Sep 2010, 03:39 PM

Hi t,

Thank you for contacting us. Regarding your questions:

Most of the messages that appear in RadGridView are customizable by using localization providers. Please refer the following help article for more details. There are several localization providers in different languages available for download in our code library section. In this case you should localize the NoDataText string.

All other issues can be handled by using our data validation functionality. Please consider the examples in our demo application - "GridView - Manipulate data - Validate Changes" and "GridView - Manipulate data - Indicate Errors".

I hope this helps. If you need further assistance, do not hesitate to write back.

Best wishes, Jack
the Telerik team

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answered on 11 Sep 2010, 12:35 PM

Hi Jack,
Thank you for your answer, here is some of my questions:

1. I wanna to disable showing the message box when occuring an error because of invalid data and showing my own text message.

2. I want to have a custom combobox which has for example 3 items that the user can select them then i want to save its value member to the database.

3. I have a Custom created Calendar which I want to show it in the GridView but I don't know how to do it.

4. where is the guide for using FormatString propery of GridView cell.

5. Is there anyway to have a text cell which has an Ellipsis button?

6. When the user makes a cell Empty, Visual Studio treats with the 'e' parameter as a NULL object, so we can not do anything with it. An example is CellValidating event:

void radGridView1_CellValidating(object sender, CellValidatingEventArgs e)

thank you again Jack, Tooraj Azizi.

answered on 16 Sep 2010, 12:10 PM

Hello t,

Thank you for writing me back. Regarding your questions:

1. You should handle the DataError event in RadGridView to replace the default error message dialog.

2. Please consider the following help article, it demonstrates the usage of GridViewComboBoxColumn.

3. You can use a custom editor in this case. Please refer to the the following help article and "Use Custom Editors" example in our demo application.

4. The FormatString property uses the same format arguments as string.Format. You can use this MSDN article as a reference.

5. Yes, this is possible. Please consider the FileName column in the "Use Custom Editors" example in our demo application.

6. I was not able to reproduce this issue using our latest release - Q2 2010 SP2. Could you you send me a sample application that reproduces it? This will help me to locate the issue and find a proper solution.
Please note that you should open a new support ticket in order to attach your project.

I am looking forward to your reply.

All the best, Jack
the Telerik team

answered on 13 Oct 2010, 09:08 AM

Hello Tooraj,

First of all, without knowing your code it would be very hard for me to tell you exactly what to do, but if it's a big control, i would suggest first mimicking the RadDateTimePicker behavior, create a smaller RadControl inherited control, and add a RadTextBox and a RadButton(ShowCalendar) to it and on ShowCalendar button click show a form with your calendar, just like the normal RadDateTimePicker does.

After that if you can just follow the articles i provided and host that custom control inside the cells collection it will work using RadHostItem.

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga

answered on 15 Oct 2010, 03:51 PM

Hi Emanuel,
Thank you for your attention,
1. First of all, I must say that the DataGridViewFADateTimePickerColumn is a class which I can add it
to VS 2010 DataGridView Component without any problem because this class is derived from DataGridViewColumn class, the class
which lets me add a column to the Grid. after adding the column I have my FADatePicker Calendar in the Grid.
public class DataGridViewFADateTimePickerColumn : DataGridViewColumn
But in order to add a coulmn to RadGridView object, my column must be of type GridViewDataColumn or a type which is derived from this class, While DataGridViewFADateTimePickerColumn is derived from DataGridViewColumn, not from GridViewDataColumn.
I have only the dll not the source code of FADatePicker Component.
I think I must write a class which derives from GridViewDataColumn to let me able to add my FADatePicker Calendar.
class FADatePickerColumn:GridViewDataColumn
{
   override NameOfTheMethodWhichCreatesTheEditorOfColumn;
        {
            execute all code except line of code which determines the type of editor;
            determine the editor type as FADatePicker or DataGridViewFADateTimePickerColumn;
        }
}
in this class I must override the method which creates the RadTextBox object as default editor of newly added column, If I am right how do I must done this job.

2.
i have two RadGridView objects on my form. RadGridView1 must show records from "One" side of relation and the second RadGridView object, RadGridView2 must show only the related records on the "Many" side of the relation when the user navigate
the RadGridView1 records.
how do i must do this job?

3.

I have a ExCheckedListBox at the bottom of my RadGridView1 on my form. ExCheckedListBox is a component derived from CheckedListBox component of VS ToolBox which supports having DataSource and DisplayMember property.

I have 3 tables: Table1,Table2 and Table3. Table1 (PK1), Table2(FK1,FK2), Table3(PK2).
foreign key equivant for PK1(primary key) field is FK1 and for PK2 is FK2. Table2 connects Table1 and Table3.
the ExCheckedListBox Displays its items(DisplayMember property) from Table3. when the user navigate the RadGridView which shows records of Table1 user can check items of ExCheckedListBox. id of that item with id of the Table1 record are stored in Table2.
so each time the user navigate the Table1 records only the items which their id are stored in Table2 are checked.
I know that I must use the SelectedItem, SelectedIndex, SelectedValue or Value properties of ExCheckedListBox component but after testing many states still I have not get the right answer.
ExCheckedListBox is like CheckedListBox except that the ExCheckedListBox supports having DataSource and DisplayMember property.
Please guide me.

Thank you very very much, Tooraj Azizi.