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the user should be able to select multiple values from CheckedListBox or ListBox and when the user click 'Save', the record should be inserted in a single column of a table.
I need code.
plz helppp

Is this what you are looking for?

I created a DataTable, added a single column and filled it with a for loop going through all the Selected Items of a ListBox.

DataTable dt = new DataTable();

for (int i = 0; i < listBox1.SelectedItems.Count; i++)

dataGridView.DataSource = dt;
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You insert rows into a database table, not columns.

You can loop over the selected items in your (Checked)ListBox and insert a row for each item, setting the same column in each row. I don't know if that is what you want.

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