There is no direct support for AutoSuggest in TextBox cell. ComboBox cell only contains AutoSuggest support. Therefore, to make a textbox cell as AutoSuggest textbox, modify the ComboBox cell to work like TextBox cell.
You can change the appearance of combo box cell like text box cell by disabling the dropdown button using the ShowButtons property. You can achieve AutoSuggest textbox by setting the AutoCompleteInEditMode property. By default, the suggested items can be dropped down while pressing the dropdown button of ComboBox. Hence, you can display the dropdown items while entering the text by handling the CurrentCellKeyPress event.
In the provided sample, 2nd row 1st column is set as AutoSuggest textbox.
The following screenshot illustrates the output.
Figure 1: AutoSuggest TextBox
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