Combo box button "No item to show"

[mayankrjain]

I have used combobox button with the use of "Data Source" as it works fine. I got all data what I want. When I add value in combobox through code It will be inserted into combobox also but when I use "type ahead" then It will be shown me data also.

But then I remove all value from combobox I then click on combobox then It shows me "No Item to show" instead I have many values.

My Data source code is as follows.
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<field name="student_name" title="Student Name" type="select"
editorType="comboBox" optionDataSource="student_master"
valueField="id" displayField="name" />

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Source Code:
I have refreshed commbobox as follows after add new values


req.setActionURL(GWT.getHostPageBaseURL()+"sc/DataSourceLoader?dataSource="+refresh_inv);

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Sometimes "type ahead" feature works fine and sometimes it doesn't.

Thanks.

[Isomorphic]

Loading a new DataSource will not affect a pre-existing ComboBox. Also, it would not generally make sense to try to redefine a DataSource as a means of changing the data shown by a ComboBox, instead, use an override of getPickListFilteCriteria to control the criteria used in the ComboBox fetch, then have a single DataSource that responds differently based on the criteria passed.