C#

benjamin yap wrote:

If i enter a wrong username and password, the whole program ended and point to my code and says, NullReferenceException was unhandled.

benjamin yap wrote:

how do i do that?

dsTablesTableAdapters.staffTableAdapter sa = new dsTablesTableAdapters.staffTableAdapter();
try
{
    string result = sa.ValidateLogin(txtUsername.Text, txtPassword.Text);
    MessageBox.Show(result[2].ToString());
    this.DialogResult = DialogResult.OK;

benjamin yap wrote:

sa.ValidateLogin(txtUsername.Text, txtPassword.Text);

public void ButtonClickHandler(Object sender, EventArgs args)
{
   requestStopThread = true; // this is a volatile bool variable
}

while(!requestStopThread)
{
   // do some stuff, terminate otherwise
}

// do something
...

if(requestStopThread)
   // terminate

// do something
...

puneet.bhatnagar123@gmail.com wrote:

PLease replace &lt; with '<' and &gt; with '>'.

private static int CompareStockItems(IStockItem x, IStockItem y)
{
                // add your sorting algorithm here
    if (x.StockCode.Length < y.StockCode.Length)
        return -1;
    else if (x.StockCode.Length > y.StockCode.Length)
        return 1;
    else
        return 0;
}

List<IStockItem> items = new List<IStockItem>();
items.AddRange(sparePartCollection);
items.AddRange(serviceToolCollection);
items.Sort(CompareStockItems);

public int CompareTo(object obj)
{
    IStockItem item = obj as IStockItem;
    if (item == null)
        return -1;
    else
    {
        if (this.StockCode.Length < item.StockCode.Length)
            return -1;
        else if (this.StockCode.Length > item.StockCode.Length)
            return 1;
        else
            return 0;
    }
}

items.AddRange(spares.ConvertAll(new Converter<SparePart, IStockItem>(SparePart.ToIStockItem)));

public static IStockItem ToIStockItem(SparePart value)
{
    return (IStockItem)value;
}