Hi,

I want to know how to implement a parent-child scenario in a GridView. I have a datasource which contains the "parent" rows, and for each parent row, I want to be able to "expand" and see another gridview which contains the child rows.

Parent and child tables do not have the same columns, and my datasource is a collection of objects.

Couldnt' find an example of this in the included samples.

Regards,
Phi Le

Hello again,

My datasource is a collection of objects, with sub-objects. The databinding is OK, but when I click the row header to perform sorting, an exception is raised.

The following code is the same as the one in the Telerik examples under RadGridView->DataBinding (select sub-object datasource)

I notice the following:

When I try to sort any column bound to a sub-object (ie. any of the first 3 columns), I get one of the following errors:
"Cannot find the column Inner1.TestProp"
"Cannot find the column Inner1.Inner2.TestProp"
"Cannot find the column Inner1.Inner2.Inner1.TestProp"

The final column sorts OK.

I also noticed that when I run this demo from within Telerik examples, I don't get an exception, but the sorting doesn't work properly for the first 3 columns.

Cheers
Phi

Hello again,

How do I programatically apply a filter to a RadGridView?

Basically, I want to hide the "Filtering Row" and apply filters on multiple columns but from within code.

Cheers
Phi

Hi,

I have a DateTime column on a RadGridView. How do I set formatting for that column?
I have tried adding GridViewDataColumn and GridViewDateTimeColumn to the MasterGridViewTemplate, then seting the DataTextFormatString property of the column to "{0:dd/MMM/yyyy}";
but that doesn't work.

Currently I am doing a work-around, where I subscribe to the OnGridViewCellFormatting event, detect if it's a date value and re-format it there, but this solution isn't really ideal.

Please advise!

Regards,
Phi Le

Hi,

I want to know how to use the GetNodeByKey() method.
It doesn't appear to work, so can you tell me if I'm missing something.

Here is the code I use:

RadTreeNode node = new RadTreeNode("node1");
node.Key = 1;
this.radTreeView1.Nodes.Add(node);

node = new RadTreeNode("node2");
node.Key = 2;
this.radTreeView1.Nodes.Add(node);

// Won't be able to find the node with key = 2, messagebox will appear
RadTreeNode selected = this.radTreeView1.GetNodeByKey(2);
if (selected == null)
 MessageBox.Show("couldnt find selected node with key=2 using GetNodeByKey()");

// this should find it ok.
foreach (RadTreeNode radNode in this.radTreeView1.Nodes)
{
 if (Convert.ToInt32(radNode.Key) == 2)
  MessageBox.Show("Found node with key = 2");
}

Regards,
Phi Le

Hi,

Create an empty form. Place a RadTabStrip there, and add a new tab. Place a RadComboBox within the newly added tab.
Close the form window, and then re-open it. You will notice that the designer code changes (there is an asterisk indicating the file has changed).

When I look at the designer generated code, I notice that the following line is added
Me.RadComboBox.FormatString = Nothing

If I save, close the form window and re-open, the designer code changes again and the previous line is no longer there. Everytime I close and re-open the form, that line appears and re-appears.

It doesnt make a difference to to the functionality but its annoying that the designer code always changes even if I havent touched the form.
I also notice that there's a slight pause, everytime I re-open the form, it seems to be regenerating the designer code. Does this happen with all forms & controls, or is it a behaviour of the VS2005 designer or is it unique to the Telerik controls?

Regards,
Phi Le