Andrey Yakovlev Andrey Yakovlev - 2 months ago 24
SQL Question

MS access Data type mismatch in criteria expression c#

I have error, i want to do a filter, which consist some combobox and datetimepicker and it's will be show in dategridview. And when i want select date from datebase, i have this error:


"Data type mismatch in criteria expression".


string strSql1 = @"Select * from GGG where
device_id LIKE '%" + metroComboBox1.Text + "%'
AND parameter_id LIKE '%" + metroComboBox3.Text + "%'
AND time_id Between 'date1' AND 'date2'";`

string constr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Users\\Ирина\\Desktop\\Visual Studio 2013\\Projects\\WindowsFormsApplication1\\WindowsFormsApplication1\\BD3.accdb;Persist Security Info=False";

string date1 = metroDateTime1.Value.ToString("MM/dd/yyyy H:mm:ss", CultureInfo.InvariantCulture).Replace('.', '/');
string date2 = metroDateTime3.Value.ToString("MM/dd/yyyy H:mm:ss", CultureInfo.InvariantCulture).Replace('.', '/');

//string strSql = ("SELECT * FROM GGG where device_id LIKE '%" + metroComboBox1.Text + "%' AND parameter_id LIKE '%" + metroComboBox3.Text + "%' ");
string strSql1 = "Select * from table1 where device_id LIKE '%" + metroComboBox1.Text + "%' AND parameter_id LIKE '%" + metroComboBox3.Text + "%' AND time_id Between 'date1' AND 'date2'";

//string strSql = "SELECT event_id, device_id, parameter_id, parameter_int_id, time_id, user_id FROM table1 where time_id between #" + metroDateTime1.Value.ToString("yyyy'/'MM'/'dd") + "# AND #" + metroDateTime3.Value.ToString("yyyy'/'MM'/'dd") + "" "# AND #" device_id LIKE '%" + comboBox2.Text + "%' "# AND #" parameter_id LIKE '%" + comboBox3.Text + "%' ");
//string strSql = "SELECT event_id, device_id, parameter_id, date_id, time_id, user_id FROM GGG where device_id like '%" + metroComboBox1.Text + "%' AND parameter_id LIKE '%" + metroComboBox3.Text + "%' ";



OleDbConnection con = new OleDbConnection(constr);
OleDbCommand cmd = new OleDbCommand(strSql1, con);
con.Open();
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable GGG = new DataTable();
da.Fill(GGG);
metroGrid1.DataSource = GGG;
con.Close();

Answer
string strSql1 = "Select * from GGG where device_id LIKE '%" + metroComboBox1.Text + "%' AND parameter_id LIKE '%" + metroComboBox3.Text + "%' AND time_id Between #"+date1+"# AND #"+date2+"#";

Better:

 performSelect(metroComboBox1.Text, metroComboBox3.Text, date1, date2);
private void performSelect(string param1, string param2, DateTime Date1,DateTime Date2){ 
using(OleDbCommand com = Conn.CreateCommand()){
   com.CommandText = "select * from GGG where device like %@mcb1% and parameter like %@mcb3% and time between @date1 and @date2";
   com.Parameters.AddWithValue("@mcb1",param1);
   com.Parameters.AddWithValue("@mcb3",param2);
   com.Parameters.AddWithValue("@date1",Date1);
   com.Parameters.AddWithValue("@date2",Date2);
   com.ExecuteReader();
} 
}

If that doesn't work, then please tell us what the values for param1, param2, date1, and date2 are when they enter the method.

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