private void textBox10_TextChanged(object sender, EventArgs e)
{
SqlConnection cn = new SqlConnection("....");
SqlDataAdapter da = new SqlDataAdapter("Select * from admission where stenroll like '" + textBox1.Text + "%' or stname like '" + textBox10.Text+ "%' or fname like '" + textBox3.Text + "%' or gender like '" + comboBox1.SelectedValue.ToString() + "%' ", cn);
DataTable tbl = new DataTable()
I dont whats is wrong.