Hi all. i am new to coding in visual studio(C#). I am using Windows Forms App (.Net Framework). I am currently doing this code but i meant an error. The error is shown in the title. These are my codes
private void registerbutton_Click(object sender, EventArgs e)
{
if (confirmMembersIDmaskedTextBox.Text != string.Empty || enterMembersIDmaskedTextBox.Text != string.Empty || enterNametextBox.Text != string.Empty)
{
if (enterMembersIDmaskedTextBox.Text == confirmMembersIDmaskedTextBox.Text)
{
SqlConnection cn = null;
SqlCommand cmd = new SqlCommand("select * from LoginTable where username='" + enterNametextBox.Text + "'", cn);
SqlDataReader dr = cmd.ExecuteReader();Exception unhandled
if (dr.Read())
{
dr.Close();
MessageBox.Show("Username Already exist please try another ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
dr.Close();
cmd = new SqlCommand("insert into LoginTable values(@username,@password)", cn);
cmd.Parameters.AddWithValue("username", enterNametextBox.Text);
cmd.Parameters.AddWithValue("password", enterMembersIDmaskedTextBox.Text);
cmd.ExecuteNonQuery();
MessageBox.Show("Your Account is created . Please login now.", "Done", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
else
{
MessageBox.Show("Please enter both password same ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show("Please enter value in all field.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
Please help me. Thank you!