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I know how to make a multi select list box. But project requirement of mine is to have a multi list box only but box should contain a tabular structure with multiple rows inside. If any column is clicked it should select all the row.

In sort how to have a multi column combo box.
SteveyJDay 25-Aug-14 9:27am    
I did something like this once.
First I created a combobox.
When the combobox was clicked I would display a div over top of it.
Inside the div add a table to display the multi column data.
Use some JavaScript and css on the table cells to style active/selected row(s)
Save the selected values to a hidden field.
Hide the overlaid div when focus is lost.

Do Google search for more.
Creating a Multicolumn Combo Box in ASP.NET[^]
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