I have a code which checks the data if already exist before you can insert to the database. and now my problem is that when after editing. After editing my existing data from the database it keeps on showing the message that it already exist. Can you please help me with a solution that will prevent it from preventing after editing. Here are my C# code below;
private void btnSave_Click(object sender, RoutedEventArgs e)
{
//This checks for empty fields or wrong fields
#region Validations for input
if (txtFullNames.Text.Length == 0)
{
Errormessage.Text = "Please enter your fullname";
txtFullNames.Focus();
}
else if(!Regex.IsMatch(txtFullNames.Text, @"^[a-zA-Z]"))
{
Errormessage.Text = "Fullname must not contain a number";
}
else if (txtSurname.Text.Length == 0)
{
Errormessage.Text = "Please enter your Surname";
txtSurname.Focus();
}
else if (!Regex.IsMatch(txtSurname.Text, @"^[a-zA-Z]"))
{
Errormessage.Text = "Surname must not contain a number";
}
else if (txtEmail.Text.Length == 0)
{
Errormessage.Text = "Please enter your Email Address";
txtEmail.Focus();
}
else if (!Regex.IsMatch(txtEmail.Text, @"^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$"))
{
Errormessage.Text = "Please enter you valid email address";
txtEmail.Focus();
}
else if (cboGender.SelectedIndex == 0)
{
Errormessage.Text = "Please select your Gender";
cboGender.Focus();
}
else if (cboCompany.SelectedIndex == 0)
{
Errormessage.Text = "Please select your Company";
cboCompany.Focus();
}
else if (txtUserName.Text.Length == 0)
{
Errormessage.Text = "Please enter your Username";
txtUserName.Focus();
}
else if (txtPassword.Password.Length == 0)
{
Errormessage.Text = "Please enter your password";
txtPassword.Focus();
}
else if (txtConfirmPassword.Password.Length == 0)
{
Errormessage.Text = "Please confirm your password";
txtConfirmPassword.Focus();
}
else if (txtPassword.Password != txtConfirmPassword.Password)
{
Errormessage.Text = "Both password must match";
}
#endregion
else
{
SqlConnection oConnection = new SqlConnection(_ConnectionString);
SqlCommand Check_Exist = new SqlCommand("SELECT UserName from UserEnrollment WHERE username = @UserName AND Password = @Password", oConnection);
Check_Exist.Parameters.AddWithValue("@UserName", txtUserName.Text);
Check_Exist.Parameters.AddWithValue("@Password", txtPassword.Password);
oConnection.Open();
SqlDataReader reader = Check_Exist.ExecuteReader();
if (reader.HasRows)
{
MessageBox.Show("Username and Password already exist!", "Error Message", MessageBoxButton.OKCancel, MessageBoxImage.Error);
}
else
{
int Gender = 0;
bool passed = int.TryParse(cboGender.SelectedValue.ToString(), out Gender);
int Company = 0;
passed = int.TryParse(cboCompany.SelectedValue.ToString(), out Company);
if (passed)
{
try
{
switch (g_i_commitType)
{
case 1:
{
bool _var = _da.InsertData(UserID,
txtUserName.Text,
txtPassword.Password,
txtFullNames.Text,
txtSurname.Text,
txtEmail.Text,
Gender,
Company
);
} break;
case 2:
{
bool _var = _da.EditData(UserId,
txtUserName.Text,
txtPassword.Password,
txtFullNames.Text,
txtSurname.Text,
txtEmail.Text,
Gender,
Company
);
} break;
}
LoadGridUsers();
MessageBox.Show("Data Successfully Submited", "Confirmation Message");
DeleteTextBox();
Errormessage.Text = "";
}
catch (Exception ex)
{
MessageBox.Show("A handled exception occurred" + ex.Message, "Error Message", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
}