Hi Radoslav,

I'd already looked at that page before you replied...:)

Unfortunately, what i'm trying to do is somewhat different. I was wondering if there was anyway

to access a header in the webgrid like any other row is accessed. You knw, something like,

//in the header's checkbox's oncheckedchanged event handler

CheckBox cb = (CheckBox)sender;

HeaderItem hdrItm = cb.Parent;

UltraGridRow row = hdrItm.HeaderRow;

// and then use this row to check or uncheck its children, as and when the header's checkbox is checked

or unchecked.

Thanks anyway.

Hi Radoslav,

I have done something similar. Correct me if i am wrong, but i think this event fires only when the grid's

rows are being rendered. So this wont work when i check/uncheck a checkbox anywhere on the grid

without causing the grid to be rendered again. I need something in the OnCheckedChanged event

of the check box only, as any other event cannot be relied upon to fire when i check/uncheck the

checkbox in the header.

P.S. Even i am using Templated column for other related stuff, but for this functionality, why use

templated column to find the clicked check box when you can directly get it from the sender object? :)

You are right. 

I think  that I found a resolution of your issue.

In page_load method

1. Bind the grid 
2. Find the Header CheckBox 
3. Add CheckedChanged Event handler.

Please see the code in my page_load method:

 protected void Page_Load(object sender, EventArgs e)

    {

         //Bind the grid

        if (!IsPostBack) { 

            UltraWebGrid1.DataSource = MakeTable();

            UltraWebGrid1.DataBind();

        }

            //Find the header check box

            TemplatedColumn column = (TemplatedColumn)UltraWebGrid1.Columns[0];

            CheckBox headerCheckBox = column.HeaderItem.FindControl("CheckBoxHeader") as CheckBox;

            //Attach handler method.

            headerCheckBox.CheckedChanged += new EventHandler(headerCheckBox_CheckedChanged); 

    }

Then implement headerCheckBox_CheckedChanged like this:

    void headerCheckBox_CheckedChanged(object sender, EventArgs e)

    {

        TemplatedColumn column = (TemplatedColumn)UltraWebGrid1.Columns[0];

        CheckBox headerCheckBox = (CheckBox)sender;

        if (headerCheckBox.Checked == true)

        {

            foreach (CellItem item in column.CellItems)

            {

                CheckBox cellCheckBox = item.FindControl("CheckBoxCell") as CheckBox;

                cellCheckBox.Checked = true;

            }

        }

        else

        {

            foreach (CellItem item in column.CellItems)

            {

                CheckBox cellCheckBox = item.FindControl("CheckBoxCell") as CheckBox;

                cellCheckBox.Checked = false;

            }

        }

    }

Please keep in mind that the checkbox in the header is set to  AutoPostBack="true"

Let me know your feedback.

Thanks radoslav,

Im almost done. The part where i was getting stuck was getting the templated column...

i was trying to get the row from the checked check box like this...

TemplatedColumn column = (TemplatedColumn)row.Cells.FromKey("chkbx");

If it's not too much (im marking this post as answer..:)) , could you tell me hw this code wud change if

the header was in the second level of the grid, and only its siblings needed to be checked?

Hello,

Please could you clarify your question below:

Do you mean hierarchical grid with child bands  or you just want to know if a checkbox  from the given row is checked?

Rishi_Poptani said:

if

the header was in the second level of the grid, and only its siblings needed to be checked?

Hi Radoslav,

The answer to both ur questions is yes. I have a hierachical grid with two bands and a

 parent child relationship between them i.e. some rows have a (+) next to them, which when

clicked causes the row to expand and reveal its child rows. These child rows, like every row

in the first band of the grid, have a header. This header has a checkbox. On checking/unchecking

this header checkbox, all the rows below only this header must have their checkboxes checked/unchecked.

If I use the code you provided(with a small tweak), all the rows in the child band get their check boxes checked, irrespective

of whether they are siblings or not.  Please see if you can work something out.

Thanks,

Rishi

Rishi did you find the solution of this problem ? , i am also stuck in the same situation please help me if you hava a solution.

Hi Radoslav,

I am using the code you have provided above i.e.

TemplatedColumn column = (TemplatedColumn)UltraWebGrid1.Bands[0].Columns[0]; //for the

//parent band

TemplatedColumn column = (TemplatedColumn)UltraWebGrid1.Bands[1].Columns[0]; 

//for the second band

But I think I am not being able to explain the issue to you properly. The thing is, I have two bands

in my grid, but when the checkbox in the header of the second band is clicked, i want ONLY the

rows below the checked header to get checked, not all the grid's rows which happen to lie in the second

band. I hope I am getting through. :)

Hi Rishi,

Thanks for the response.

You can distinguish the bands utilizing to the Bands property if we look back at our example :

In order to get the parent band level try this :

first code:

TemplatedColumn column = (TemplatedColumn)UltraWebGrid1].Columns[0];

changed code (it should work ):

TemplatedColumn column = (TemplatedColumn)UltraWebGrid1.Bands[0].Columns[0]; 

In this way when you iterate over CellItems collection you should check or uncheck only the checkboxes from the parent band. Yo can get a reference to the child band in the same way, just change the Index of the Bands property => Bands[1].