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Cannot convert sql query result in interger

Posted on 2016-09-30
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Last Modified: 2016-09-30
I am trying to get the points value from the database. I am using an auto-increment ID so that the points i take are from the last log. Here is my code:

 private void LevelTwoPartTwo_Load(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection("Data Source=(LocalDB)\\MSSQLLocalDB;AttachDbFilename=C:\\Users\\Marina\\Desktop\\FaceNameGame\\facenamegame\\mygamedb.mdf;Integrated Security=True;Connect Timeout=30");
            SqlCommand cmd = new SqlCommand("select Points from Userrecords where ID='MAX(ID) and Username='" + LoginInfo.UserID + "'", con);
           
            con.Open();
            point = Convert.ToInt32(cmd.ExecuteScalar());
            //cmd.ExecuteNonQuery();
            con.Close();
           
            string[] files = Directory.GetFiles(@"C:\Users\Marina\Desktop\FaceNameGame\images\Level2\used", "*.jpg", SearchOption.AllDirectories);
            PhotoPicBx.Load(files[i]);
            NameTxtBx.Focus();
            Pointlbl.Text = point.ToString();
           

But it always throws exception that MAX('ID') cannot be converted to interger...what can i do?
(Sorry for my bad English, not my native language)
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Question by:Marina K
3 Comments
 
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41823265
SQL Syntax ix incorrect !! Try this ..

select Points from 
Userrecords 
where  Username = LoginInfo.UserID
GROUP BY ID
HAVING ID = MAX(ID)

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LVL 22

Accepted Solution

by:
Ferruccio Accalai earned 500 total points
ID: 41823266
You should use
[...]where id = (Select MAX(ID) from Userrecords) [...]

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1
 

Author Closing Comment

by:Marina K
ID: 41823272
Thanks! This worked well...thank you very much
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