In this demo page, we demonstrate cascading combobox column editors. By selecting a value from the first combobox column editor, the possible options displayed in the second combobox are updated. This is acheved by using the column object's 'columntype' property set to 'combobox' and the 'initeditor' callback function of the second column. The 'initeditor' callback is called each time a Grid editor is opened. In the sample, the ComboBox editor's data source is updated dynamically.
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