Hello,

It is different from normal scenario. In Flat or normal WebGrid, we have ISRowChecker which will check or uncheck rows when the checkbox header clicked. However, in grouping, hierarchical or even in SelfReference, you might see that the child level is not checked. This is default behaviour. 
Since this is not a treeview, even though the parent row is checked, the child will not be checked. 
Our checkbox is only for a flag for the current row. That's why it does not designed for the other level.
Same result with your custom checkbox. I think you used logic to check the loaded row. However, it can only be applied for one level (parent).
You will need to add additional code to get the selfreference child rows and check them manually.

Regarding the expand in SelfReference, when there is a flypostback request such as sort,refresh, update, etc, WebGrid would collapse the level again. We don't have any property to handle that scenario for now.
I suggest you to expand all the row at first load. With this way, it will not get closed.

 protected void WebGrid1_InitializeRow(object sender, ISNet.WebUI.WebGrid.RowEventArgs e)
    {
        if (e.Row.SelfRefChildren != null)
        {
            e.Row.ExpandSelfRefRow();
        }
    }

Regards,
Handy

Hello,

We are sorry for the late response due to public national mouslim holiday in our country.
Followed your step by step, I can replicate the issue in here. I will report this problem to our developer team.

Regards,
Handy

Hello Yousif,

I think this is not a bug or an issue. When bind WebCombo programmatically and using LoadOnDemand scenario, you could not hanlde with your current way. The problem is, the data has not loaded or not loaded correctly with your current way. Also, you bind WebCombo not in correct place. Please use InitializeDataSource, instead of Load event.
To use LoadOnDemand scenario, you will need to handle your operation manually. This what is called by LoadOnDemand. Simply set AllowAutoQueryHandler property to false.
By turning off this property, every time you click on DropDown and type a text, this event would be called.

Regards,
Handy

Hello Murthy,

It works fine in here. We do have issues at the past. If I am not mistaken in the current build you have now. In order to run the sample, I suggest you to update into the latest hotfixes.

Regards,
Handy

Hello,

Please find attached sample. It should guide you how to select by using parameter. You can also shifting the parameter and rebind it to WebGrid.

Note: To run the sample, please use Northwind database.

Regards,
Handy