How can I do this?

Question

I have some text stored in text file in format

email:password
email:password
email:password

I need to add all emails from that text file in some collection(arraylist or something) and add all password from that file in second collection(arraylist)..
How to do that...
Thanks

Answer 1

Which part are you struggling with?  Reading the file, or adding to a dictionary/arraylist. 

Dictionary<TKey, TValue> is best for this:




Dictionary<string, string> passwords = new Dictionary<string, string>();

foreach (string combo in File.ReadAllLines("file.txt"))
{
    string[] values = combo.Split(':');
    if (values.Length >= 2)
        passwords.Add(values[0], values[1]);
}

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Answer 2

I want to use two arraylist or something similar because I will later use

Arraylist emails=new Arraylist();
Arraylist passwords=new Arraylis();
foreach(string email in emails)
foreach(string password in passwords)
{
sending multiple emails...
}


I'm having problems with adding email from file to Arraylist "emails" and adding password to Arraylist "passwords"
I think that I need to separate strings and than filter them and  save each to their arraylist...But I don't need how..
Any example..

Answer 3

I want to use two arraylist or something similar because I will later use

Arraylist emails=new Arraylist();
Arraylist passwords=new Arraylis();
foreach(string email in emails)
foreach(string password in passwords)
{
sending multiple emails...
}

That ain't gonna work the you think.  You'll be sending far more emails than you expect right now.  Use the Debugger to step through your logic loops.

---

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Answer 4

Your suggested algorithm won't work the way you want it to work.  Let's say we have this:

bob:Swordfish
jim:Alligator
frank:FriedFish

Now, when you do nested foreach statements like you're trying to do, you'll end up with the inner loop with the passwords going completely through the list before going on to the next email, which means, you'll send every email to the first person, then every email to the second person and so on.  Given the data above, this would happen:

email sent to - password sent in email
bob - Swordfish
bob - Alligator
bob - Friedfish
jim - Swordfish
jim - Alligator
jim - Friedfish
frank - Swordfish
frank - Alligator
frank - Friedfish

Obviously, they don't all share their passwords. 

The Dictionary<string, string> is still what you need.  Watch how I've fleshed out the code below:

Dictionary<string, string> passwords = new Dictionary<string, string>();

foreach (string combo in File.ReadAllLines("file.txt"))
{
    string[] values = combo.Split(':');
    if (values.Length >= 2)
        passwords.Add(values[0], values[1]);
}

foreach (KeyValuePair<string, string> kvp in passwords)
{
    string email = kvp.Key;
    string password = kvp.Value;
    // send an email using the specified email and password
}


A dictionary will maintain the relationship between the email and the password, which is really what you want to do.  I'm assuming you don't want to send out all the passwords to all the users.

Go look up Dictionary<TKey, TValue> on google.  Click the first link.

---

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Answer 5

I'll try this and get back to you,thanks for this,I didn't used Dictionary till now...

Answer 6

you have write in your code 
string password = kvp.Password;

did you mean 
string password = kvp.Value

because I get error

Answer 7

you have write in your code 
string password = kvp.Password;

did you mean 
string password = kvp.Value

because I get error

I did.  I've changed it for you.

---

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Answer 8

it's working,,thanky you

I have one more questions

When there are duplicates email:password in Dictionary I get  exception,how to remove duplicates..
How can I filter only for example Gmail emails to load it in Dictionary..

Answer 9

Dictionary<string, string> passwords = new Dictionary<string, string>();

foreach (string combo in File.ReadAllLines("file.txt"))
{
    string[] values = combo.Split(':');
    if (values.Length >= 2 && !passwords.ContainsKey(values[0]))
        passwords.Add(values[0], values[1]);
}

---

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Answer 10

how would you filter emails and password in Dictionary by provider(gmail,hotmail,yahoo)????

Answer 11

how would you filter emails and password in Dictionary by provider(gmail,hotmail,yahoo)????

Sorry man, this is a completely different question at this point.  Start a new post. 

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Answer 12

one way:

 

 

 foreach (KeyValuePair<string, string> kvp in accounts)
            {
                if(kvp.Key.Contains("gmail"))
                {
//mail....
                 }

other way:

Dictionary<string, string> emails = new Dictionary<string, string>();

foreach (string combo in File.ReadAllLines(@"C:\User\Comp\Desktop\file.txt"))
{
    string[] values = combo.Split(':');
    if (values.Length >= 2)
    {
        // Filter here... for example...
        if (values[0].Containsh("gmail"))
        {
            // Now your emails will only be added if they match your criteria...
            emails.Add(values[0], values[1]);
        }
    }

Answer 13

Your suggested algorithm won't work the way you want it to work.  Let's say we have this:

bob:Swordfish
jim:Alligator
frank:FriedFish

Now, when you do nested foreach statements like you're trying to do, you'll end up with the inner loop with the passwords going completely through the list before going on to the next email, which means, you'll send every email to the first person, then every email to the second person and so on.  Given the data above, this would happen:

email sent to - password sent in email
bob - Swordfish
bob - Alligator
bob - Friedfish
jim - Swordfish
jim - Alligator
jim - Friedfish
frank - Swordfish
frank - Alligator
frank - Friedfish

Obviously, they don't all share their passwords. 

The Dictionary<string, string> is still what you need.  Watch how I've fleshed out the code below:

Dictionary<string, string> passwords = new Dictionary<string, string>();

foreach (string combo in File.ReadAllLines("file.txt"))
{
    string[] values = combo.Split(':');
    if (values.Length >= 2)
        passwords.Add(values[0], values[1]);
}

foreach (KeyValuePair<string, string> kvp in passwords)
{
    string email = kvp.Key;
    string password = kvp.Value;
    // send an email using the specified email and password
}


A dictionary will maintain the relationship between the email and the password, which is really what you want to do.  I'm assuming you don't want to send out all the passwords to all the users.

Go look up Dictionary<TKey, TValue> on google.  Click the first link.

---

Coding Light - Illuminated Ideas and Algorithms in Software
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can I use instead of this:
foreach(GenericPair<TValue1, TValue2> kvp in passwords)
{
string email=kvp.Tvalue1; // or string email=kvp.first
string password=kvp.Tvalue2;   // or string password=kvp.second
 // send an email using the specified email and password

}

Answer 14

can I use instead of this:

foreach (KeyValuePair<string, string> kvp in passwords)
{
    string email = kvp.Key;
    string password = kvp.Value;
    // send an email using the specified email and password
}

//-------------------------------------------------------------------------------------------------

foreach(GenericPair<TValue1, TValue2> kvp in passwords)
{
string email=kvp.Tvalue1;            // or string email=kvp.first
string password=kvp.Tvalue2;      // or string password=kvp.second
 // send an email using the specified email and password

}