Checkboxes with Multi-Level Grouping

[Taz]

Hello all,

I just can't figure out how to add a checkbox to a second level (of a 3 level) grouping without loosing the data that is there.

for instance 

--Dept

----<check box here> Employee

--------Projects

I am able to add the check box like this:

 if (e.Item is GridGroupHeaderItem )
            {

                GridGroupHeaderItem item = e.Item as GridGroupHeaderItem;

                if ( item.GroupIndex.LastIndexOf("_") == 1)
                {

                    DataRowView groupDataRow = (DataRowView)e.Item.DataItem;
                    CheckBox check = new CheckBox();
                    check.AutoPostBack = false;
                    check.ID = "foo";
                    check.Text = this._headerTextForEmployeeName + " FirstName - LastName";

                    check.CheckedChanged += new EventHandler(check_CheckedChanged);

                    item.DataCell.Controls.Add(check);

                    }

                }

But this REPLACES the header text and value that was there!!

Any ideas or suggestions?

[Shinu]

Hi Graham,

Give a try with following code in order to add the checkbox control and see whether it helps.

CS:

    protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridGroupHeaderItem)
        {
            GridGroupHeaderItem item = e.Item as GridGroupHeaderItem;
            if (item.GroupIndex.LastIndexOf("_") == 1)
            {
                DataRowView groupDataRow = (DataRowView)e.Item.DataItem;
                CheckBox check = new CheckBox();
                check.AutoPostBack = false;
                check.ID = "foo";
                item.Controls[1].Controls.Add(check);
            }
        }
    }

-Shinu.

[Taz]

That did the trick. Thanks.

Now to figure out how to get data from column XX only on rows where that checkbox is check during a postback,

I guess I can iterate through the contros one at a time like I did to add the checkbox and look for a check box and it's state.

[SR]

Hi Shinu

I have Same Scenario but i need check boxes on first level and i  have one more check box in Grid Template column when i am check this select all check boxes in first level .

Regards
SR.

[Shinu]

Hi,

Please take a look at the following code snippet to obtain your required scenario.

ASPX:

<telerik:GridTemplateColumn>
  <ItemTemplate>
      <asp:CheckBox ID="TemplateCheckBox" runat="server" />
  </ItemTemplate>
</telerik:GridTemplateColumn>

C#:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
    CreateHeaderControls(e);
}
protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e)
{
    CreateHeaderControls(e);
}

void check_CheckedChanged(object sender, EventArgs e)
{
    CheckBox check = (CheckBox)sender;
    GridGroupHeaderItem groupHeader = (GridGroupHeaderItem)check.NamingContainer;
    GridItem[] children = groupHeader.GetChildItems();
    foreach (GridItem child in children)
    {
        if (child is GridDataItem)
        {
            ((child as GridDataItem).FindControl("TemplateCheckBox") as CheckBox).Checked = (sender as CheckBox).Checked;
        }
    }
}
private void CreateHeaderControls(GridItemEventArgs e)
{
    if (e.Item is GridGroupHeaderItem)
    {
        GridGroupHeaderItem item = e.Item as GridGroupHeaderItem;
        DataRowView groupDataRow = (DataRowView)e.Item.DataItem;
        CheckBox check = new CheckBox();
        check.AutoPostBack = true;
        check.ID = "CheckAll";
        check.Text = "Check/Uncheck CheckBox1 column";
        check.CheckedChanged += new EventHandler(check_CheckedChanged);
        item.DataCell.Controls.Add(check);
    }
}

Hope this helps.Let me know if any concern.
Thanks,
Shinu

[SR]

Hi Shinu
I am using Header Template  and i did the grouping with two levels 
For EX:level 1 Dept,Level2 is Emp;
now  i am try to add the check box in Level 1 when i am using this check box is came but the prob is second level also replace with checkbox and level1 group text my need is groupheader template with check box for level1 .

when ever i am using this the above scenario repeated how to avoid this ?
 <GroupHeaderTemplate>
  <asp:CheckBox ID="chkHeader" runat="server" Text='<%# Eval("Dept") %>'></asp:CheckBox>
  </GroupHeaderTemplate>

[OZAN]

Hi Shinhu

 

You sample code works perfectly if there is a single group. When there are more then one however the following occurs:

1) The innermost group checkbox works fine

2) Second level group's checkbox does not work and makes the innermost group headers disappear completely

3) Third level group checkbox completely crashes .exe

 

The scenario I am using is dynamic grouping with the following sample scenario:

Group A

------- Group B

-------------- Group C

-------------- Group C

------- Group B 

-------------- Group C
-------------- Group C

Group A

------- Group B

-------------- Group C
-------------- Group C

------- Group B

-------------- Group C
-------------- Group C

 

So in this scenario Group C checkbox works perfectly fine. Group B checkbox does nothing and makes Group C GroupHeader disappear completely. Data is there though. Group A crashes the app completely.

 

If you can extend you example to handle this situation it would be awesome. Thanks in advance....

[Attila Antal]

Hi Ozan,

To have the outermost Group checkbox have an effect, you will need to iterate through the items recursively. Here is an extension of the Code snippet provided by Shinu. Here is a short video for demonstration RadGrid GroupHeader Check in Multiple Level.

void recursive (GridItem[] children, bool isChecked)
{
    foreach (GridItem child in children)
    {
        if (child is GridDataItem)
        {
            ((child as GridDataItem).FindControl("TemplateCheckBox") as CheckBox).Checked = isChecked;

        }else if (child is GridGroupHeaderItem)
        {
            GridGroupHeaderItem groupHeader = child as GridGroupHeaderItem;

            recursive(groupHeader.GetChildItems(), isChecked);
        }


    }
}

void check_CheckedChanged(object sender, EventArgs e)
{
    CheckBox check = (CheckBox)sender;
    GridGroupHeaderItem groupHeader = (GridGroupHeaderItem)check.NamingContainer;
    GridItem[] children = groupHeader.GetChildItems();
    recursive(children, check.Checked);
}
private void CreateHeaderControls(GridItemEventArgs e)
{
    if (e.Item is GridGroupHeaderItem)
    {
        GridGroupHeaderItem item = e.Item as GridGroupHeaderItem;
        DataRowView groupDataRow = (DataRowView)e.Item.DataItem;
        CheckBox check = new CheckBox();
        check.AutoPostBack = true;
        check.ID = "CheckAll";
        check.Text = "Check/Uncheck CheckBox1 column";
        check.CheckedChanged += new EventHandler(check_CheckedChanged);
        item.DataCell.Controls.Add(check);
    }
}

 

Please note that the Crashing part might happend due to other reasons or code logic. You will need to double check the logic you have in code behind and ensure that there are no conflicts while looping through the items.

 

Kind regards,
Attila Antal
Progress Telerik