Hello Maged,

Yes, that is our default behaviour. When open the dropdown, it will load the data.

To overcome this issue, you will need to show the dropdown as you said.

So, please try to call ShowDropDwon at OnInitialize client side event.

WebCombo1.ShowDropDown();

Regards,
Handy

Hi,

It works well in here. It seems you were not giving the correct sample.
It doesn't have any grouping and virtual load settings. 

I tried to set it but the grouping works well. Also, Does the render issue look like my screenshot?

If yes, you can resize the header by setting the width style in its element.

e.g

function WebGrid1_OnColumnGroup(controlId, columnObject)
{
     var WebGrid1 = ISGetObject(controlId);
     window.setTimeout(function(){resizeGroupHeader();},300);
     return true;
}
function resizeGroupHeader()
{
     var WebGrid1 = ISGetObject("WebGrid1");
     var table=WebGrid1.RootTable;
     table.GetElement(WG40.COLHEADERGROUP, WG40.HTMLDIV).parentNode.parentNode.parentNode.childNodes[0].childNodes[0].childNodes[0].childNodes[1].childNodes[0].childNodes[0].childNodes[0].childNodes[0].childNodes[2].style.width = "300px";
     table.GetElement(WG40.COLHEADERGROUP, WG40.HTMLDIV).parentNode.parentNode.parentNode.childNodes[0].childNodes[0].childNodes[0].childNodes[1].childNodes[0].childNodes[0].childNodes[0].childNodes[0].childNodes[2].childNodes[0].style.width = "280px";
}

Also, would you mind to show me in recording video about how to replicate in this sample? It would help us to understanding the issue.

Regards,
Handy

Hello Raja,

Normally, our WebCombo is not ReadOnly mode. You can type something in there.
Based on your issue, it is a little weird behaviour? Do you some container to place WebCombo?
Please let me know how to replicate your issue in here. Or you can help us by sending a simple sample that replicates this issue.
If TextBox mode is not set into ReadOnly, it should work as expected. Also, ReadOnly would not allow any input by typing in the textbox.

Regards,
Handy

Hello David,

Thank you for your report. For temporary, you can get the information in offline documentation, WebGrid References. I have forwarded this issue to our development teams and they will fix this asap.

Regards,
Handy