SQL database: search more than one column

Question

I got this code which works fine:

DataView dv = new DataView(bazaDataSet.tbl_baza);

if (listBox1.SelectedIndex == 0)     
{
     dv.RowFilter = string.Format("Name LIKE '%{0}%'", txtSearchData.Text);
     dataGridView1.DataSource = dv;
}

but I'm trying to search more than one column, and I can't get it to work for me. At the end I want user to be allowed to choose more then one item from listBox and search database regarding that choice.

Answer 1

You can build up strings that can be used in your RowFilter , something like

dv.RowFilter = string.Format("Name LIKE '%{0}%' AND City LIKE '%{1}%'", txtSearchData.Text, txtSearchDataCity.Text)

You would have to iterate through the search terms that your user selects though so in the case of a listBox you could do something like this building up a string as you go

StringBuilder rowFilter = new StringBuilder();

foreach (var item in listBox1.SelectedItems)
{
    if(rowFilter.Length > 0)
    {
        rowFilter.Append(" or ");
        rowFilter.Append("Name LIKE '%" + item.ToString() "%'");
    }
}

Then for your RowFilter

dv.RowFilter = rowFilter;

This link may help as well - DataView RowFilter Syntax