datatable empty upon retrieval

[proteome]

The problem is that the datatble upon calling the printout method contains no data.

Mywebservicelass
{
public DataTable ledger;
[WebMethod]
    public void Init()
    {

        Random rand = new Random();
        
        //adds columns to the table
        this.ledger.Columns.Add("accountNumber", typeof(System.Int32));
        this.ledger.Columns.Add("transactionType", typeof(System.String));
        this.ledger.Columns.Add("transactionAmount", typeof(System.Int32));
        
        int count = rand.Next(20) + 1;
        int[] accounts = {12345, 34567, 98765, 76543, 02468};
        string[] types = { "d", "w" };
        
        for (int i = 0; i < count; i++)
        {
            DataRow newRow = ledger.NewRow();
            newRow["accountNumber"] = accounts[rand.Next(5)];
            newRow["transactionType"] = types[rand.Next(2)];
            newRow["transactionAmount"] = rand.Next(100);
            ledger.Rows.Add(newRow);
            ledger.AcceptChanges();
        }
        
       
      
    }
[WebMethod]
    public string PrintRows()
    {
        string x ="";
        
        DataRow[] rows = ledger.Select();
        x += "Bank Ledger\r\n";
        x += "accountNumber\ttransactionType\ttransactionAmount\r\n";
        if (rows.Length <= 0)
        {
            x+= "no rows found\r\n";
            return x;
        }
        foreach (DataRow r in rows)
        {
            foreach (DataColumn c in r.Table.Columns)
            {
                x+= "\t {0}" + r[c].ToString();
            }
        }
        return x;
    }

 

[jbenson001]

How are you calling the PrintRows() function: You need to do something like this to display the results:

Service1 srv = new Service1(); 
string s; 
srv.Init(); 
s = srvx.PrintRows(); 
Response.Write(s);

Jim

 

[proteome]

I have find my error I need to declare the DataTable as static.