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I have a listbox with names of tables in a SQL server database. The user selects a table in the list, and the datagridview below populates with that table. However, every time the user selects a different table in the list, the columns from the previous table remain in the DGV, and the new ones are added, so with every click in the listbox I have an ever expanding set of columns in the DGV.
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I have a listbox with names of tables in a SQL server database. The user selects a table in the list, and the datagridview below populates with that table. However, every time the user selects a different table in the list, the columns from the previous table remain in the DGV, and the new ones are added, so with every click in the listbox I have an ever expanding set of columns in the DGV.

Datagridview column problem

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