Foreach Question

Vulpes,

That solved it! The foreach block never ran when the requested info was invalid as you stated.  I moved the message box
from within the else block to in between the linq query and foreach block. here is the fix:

if (query.Count().ToString() == "0")
            {
                string message = "Wrong user name or password.";
                string caption = "Invalid User Name or Password.";
                MessageBoxButton Button = MessageBoxButton.OK;
                MessageBoxImage Icon = MessageBoxImage.Warning;
                MessageBox.Show(message, caption, Button, Icon);
            }

I assume since the query returned 0, the foreach block did not have a reason to execute.  Thanks for the help and insight from everyone.

Rich

In C# and the languages (C, C++ and Java at least) with the same syntax the curly braces ("{}") are used to specify a block. A block can be used anywhere that a single statement can be used. So a foreach statement just executes a single statement but that statement can be a block containing many statements. For example the following is a modified version of a portion of Vulpes's code. This is syntactically correct and work as intended. Most programmers would not do this but regardlous of the style it is valid.

Great suggestions! I will try these out and get back to you guys with the results.

Hi,

 You may first Check Username and Password Value after entering into foreach loop by,

Recently i had posted a thread, related to your query. For example:


 int[] array = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

        // Print.
        foreach (int value in array)
        {
            for (int i = 0; i < value; i++)
                this.TextBox1.Text += value.ToString();
            this.TextBox1.Text += System.Environment.NewLine;
        }


        // Reverse.
        Array.Reverse(array);


        // Print.
        foreach (int value in array)
        {
            for (int i = 0; i < value && value != 9; i++)
            {
                this.TextBox1.Text += value.ToString();
            }
            if (value != 9 )
                this.TextBox1.Text += System.Environment.NewLine;
        }

The output will be:

1
22
333
4444
55555
666666
7777777
88888888
999999999
88888888
7777777
666666
55555
4444
333
22
1

The If and for loop works perfectly for me.

Well, right now the query is pulling the data from an entity class which currently only holds one user name and password. This foreach block is part
of a button click method in a wpf. When i enter the correct information the program proceeds as expected. When I then enter incorrect information
I get no response from the program; I click the button and nothing happens.  

On a side note.  Is there a certain way to paste the code into this post, or is just manually typing it the best way, as my code is all over the place
in the previous post, lol.

Ok, here's the code.  Sorry for leaving it out of the initial post.

foreach (var userItem in query)             {                 if ((userItem.User.ToString() == userName) && (userItem.Password.ToString() == password))                 {                     User SiteDirector = new User();                     SiteDirector.DirectorUserName = userItem.User.ToString();                     Users.NavDirector NavDirector = new Users.NavDirector();                     NavDirector.Show();                 }                 else                 {                     string message = "Wrong user name or password.";                     string caption = "Invalid User Name or Password.";                     MessageBoxButton Button = MessageBoxButton.OK;                     MessageBoxImage Icon = MessageBoxImage.Warning;                     MessageBox.Show(message, caption, Button, Icon);                 }             }

I am simply trying to get message box to show when either the password or username is incorrect.  I have confirmed 
that the first part works, as it executes correctly when the appropriate username and password is supplied, but 
the else statement doesn't seem to be recognized. The program builds with out errors, so I am a bit clueless here.

I thought it might help if I wrote a simple example of using an if/else statement within a foreach block:

}  

The output should be : zbcdzfgh   

Yes, you can.

you can also use switch statement but i suppose you should include your code, so that we can easily identify error.

Yes, you can include an if/else statement (or, for that matter, any other type of statement) in a foreach block.

If you can post your code, then we can take a look at it.