How to use validations for windows application with c#?

[Muralikrishna]

Hi All,

How to use validations for windows application with c#. I have kept "error provider" for two text box validation. It is showing error, But at the same time record also saving in to database.Once all the fields is field then only record will be save in to database. And how to add required validation for combo box? Please find the attached code document.

Thanks and regards,
Murali.

[Muralikrishna]

I tried like this , it's working fine.

if (txtAddress.Text != "")
{
if (txtPincode.Text != "")
{
 
if (txtcity.Text != "")
{
 
SqlConnection con = new SqlConnection(strConn);
con.Open();
SqlCommand cmd = new SqlCommand("sp_rm_insert_basicfamily", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@FamilyID", txtFamilyid.Text);
cmd.Parameters.AddWithValue("@HHID", txtHeadofhousehold.Text);
cmd.Parameters.AddWithValue("@Religion", cbxReligion.SelectedValue);
cmd.Parameters.AddWithValue("@Caste", cbxCaste.SelectedValue);
cmd.Parameters.AddWithValue("@HouseNo", txtHouseno.Text);
cmd.Parameters.AddWithValue("@Address1", txtAddress.Text);
cmd.Parameters.AddWithValue("@Village", txtcity.Text);
cmd.Parameters.AddWithValue("@State", cbxState.SelectedValue);
cmd.Parameters.AddWithValue("@District", cbxDistrict.SelectedValue);
cmd.Parameters.AddWithValue("@Mandal", cbxMandal.SelectedValue);
cmd.Parameters.AddWithValue("@Pincode", txtPincode.Text);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Successfully Saved");
}
 
else
{
MessageBox.Show("Please enter city");
}
}
 
else
{
MessageBox.Show("Please enter pin code");
}
}
 
else
 
{
 
MessageBox.Show("Please enter address");
 
}