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Views: 3038 | Replies: 29 | Solved
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Join Date: Nov 2007
Posts: 52
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Junior Poster in Training
Hi and thanks for your reply,
I found the method of generating numbers. It's working... But how can I improve it so that the code are not repeated as v_code is my primary key in my database.
the method is as follows:
//Generate v_code
private String generateVCode()
{
char[] normalChars = "qwertyuiopasdfghjklzxcvbnm1234567890".ToCharArray();
string code = string.Empty;
for (int i = 0; i < 20; i++)
{
char n = ' ';
n = normalChars[GetRandomNumber(normalChars.Length - 1)];
if (i % 2 == 0)
code += n.ToString().ToUpper();
else
code += n;
}
return code;
}
//Get Random Number
public static int GetRandomNumber(int maxvalue)
{
System.Security.Cryptography.RandomNumberGenerator random =
System.Security.Cryptography.RandomNumberGenerator.Create();
byte[] r = new byte[1];
random.GetBytes(r);
double val = (double)r[0] / byte.MaxValue;
int i = (int)Math.Round(val * maxvalue, 0);
return i;
}
Thank you in advance.
I found the method of generating numbers. It's working... But how can I improve it so that the code are not repeated as v_code is my primary key in my database.
the method is as follows:
//Generate v_code
private String generateVCode()
{
char[] normalChars = "qwertyuiopasdfghjklzxcvbnm1234567890".ToCharArray();
string code = string.Empty;
for (int i = 0; i < 20; i++)
{
char n = ' ';
n = normalChars[GetRandomNumber(normalChars.Length - 1)];
if (i % 2 == 0)
code += n.ToString().ToUpper();
else
code += n;
}
return code;
}
//Get Random Number
public static int GetRandomNumber(int maxvalue)
{
System.Security.Cryptography.RandomNumberGenerator random =
System.Security.Cryptography.RandomNumberGenerator.Create();
byte[] r = new byte[1];
random.GetBytes(r);
double val = (double)r[0] / byte.MaxValue;
int i = (int)Math.Round(val * maxvalue, 0);
return i;
}
Thank you in advance.
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Join Date: Dec 2006
Location: United States
Posts: 613
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Solved Threads: 15
DaniWeb Expert
You can check it against the Database, if it already exists then call the same routine to generate next randomn no.
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Join Date: Nov 2007
Posts: 52
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Junior Poster in Training
Cool, I understand already. Thanks..
Erm, Now I have an error with my email.
I have 2 recipents, both vercode and apid in the database are different.
however, both the recipents receive the same vercode. the first recipents receive the second recipent's ver_code(different from database).
String body = "<html><body>Hi, <br><br>
"<br> <a href='<link>/'> VDAS </a> <br> Your Verification code is : <b>";
String footer = "</b><br> Thank You!" +
"<br><br>Regards, <br>Team</body></html>";
VerCode vc = new VerCode();
if (!txtEmail1.Text.Equals(""))
{
String v_code = generateVCode();
vc = new VerCode(v_code,"1",projectID);
VerCodeDAO.addVCode(vc);
msgMail.Body = body + v_code + footer;
MailAddress to1 = new MailAddress(txtEmail1.Text);
if (!txtWatcherEmail1.Text.Equals(""))
{
MailAddress cc1 = new MailAddress(txtWatcherEmail1.Text);
msgMail.CC.Add(cc1);
}
msgMail.To.Add(to1);
}
if (!txtEmail2.Text.Equals(""))
{
String v_code = generateVCode();
vc = new VerCode(v_code, "2", projectID);
VerCodeDAO.addVCode(vc);
MailAddress to2 = new MailAddress(txtEmail2.Text);
if (!txtWatcherEmail2.Text.Equals(""))
{
MailAddress cc2 = new MailAddress(txtWatcherEmail2.Text);
msgMail.CC.Add(cc2);
}
msgMail.To.Add(to2);
msgMail.Body = body + v_code + footer;
}
smtp.Send(msgMail);
I tried and put smtp.Send(msgMail); into each if statement but it's worst.
I apologise for troubling you but please advice. Thanks a Million. By the way, I find that it's not good to use if statements for checking of each txtbox (null or not) because I've 5 textboxes.
Other than using switch is there any methods for me to use? I thought of using for loop. is it possible. if so, can you please give me some hints/tips on the coding ...
Erm, Now I have an error with my email.
I have 2 recipents, both vercode and apid in the database are different.
however, both the recipents receive the same vercode. the first recipents receive the second recipent's ver_code(different from database).
String body = "<html><body>Hi, <br><br>
"<br> <a href='<link>/'> VDAS </a> <br> Your Verification code is : <b>";
String footer = "</b><br> Thank You!" +
"<br><br>Regards, <br>Team</body></html>";
VerCode vc = new VerCode();
if (!txtEmail1.Text.Equals(""))
{
String v_code = generateVCode();
vc = new VerCode(v_code,"1",projectID);
VerCodeDAO.addVCode(vc);
msgMail.Body = body + v_code + footer;
MailAddress to1 = new MailAddress(txtEmail1.Text);
if (!txtWatcherEmail1.Text.Equals(""))
{
MailAddress cc1 = new MailAddress(txtWatcherEmail1.Text);
msgMail.CC.Add(cc1);
}
msgMail.To.Add(to1);
}
if (!txtEmail2.Text.Equals(""))
{
String v_code = generateVCode();
vc = new VerCode(v_code, "2", projectID);
VerCodeDAO.addVCode(vc);
MailAddress to2 = new MailAddress(txtEmail2.Text);
if (!txtWatcherEmail2.Text.Equals(""))
{
MailAddress cc2 = new MailAddress(txtWatcherEmail2.Text);
msgMail.CC.Add(cc2);
}
msgMail.To.Add(to2);
msgMail.Body = body + v_code + footer;
}
smtp.Send(msgMail);
I tried and put smtp.Send(msgMail); into each if statement but it's worst.
I apologise for troubling you but please advice. Thanks a Million. By the way, I find that it's not good to use if statements for checking of each txtbox (null or not) because I've 5 textboxes.
Other than using switch is there any methods for me to use? I thought of using for loop. is it possible. if so, can you please give me some hints/tips on the coding ...
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Join Date: Dec 2006
Location: United States
Posts: 613
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DaniWeb Expert
First debug and see what values are you getting for String v_code = generateVCode(); for each each call.
Then try using diff. mail objects to send mails to diff. people. In the above example you are trying to send the same mail to diff. user.
Then try using diff. mail objects to send mails to diff. people. In the above example you are trying to send the same mail to diff. user.
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Join Date: Dec 2006
Location: United States
Posts: 613
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DaniWeb Expert
ok, I got the problem,
In the database you might be getting diff. verification code but when you send in email it is coming same, right?
And the reason is because you are using the same mail object and same v_code variable. You have to use diff. mailobject instances for diff. values.
In the database you might be getting diff. verification code but when you send in email it is coming same, right?
And the reason is because you are using the same mail object and same v_code variable. You have to use diff. mailobject instances for diff. values.
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Join Date: Nov 2007
Posts: 52
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Rep Power: 2
Solved Threads: 0
Junior Poster in Training
Cool. I got it already. It's working perfectly. Thanks man~
So now I can use the v_code, from here it's similar with login right?
get the v_code from the textbox, check who is the user or valid v_code then show the output?
am i right?
by the way, erm, there's no other options then if-else statements/switch??
sorry.
So now I can use the v_code, from here it's similar with login right?
get the v_code from the textbox, check who is the user or valid v_code then show the output?
am i right?
by the way, erm, there's no other options then if-else statements/switch??
sorry.
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Join Date: Dec 2006
Location: United States
Posts: 613
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DaniWeb Expert
Switch is faster than using "if". Also i think you are in the right direction with the login.
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Join Date: Dec 2006
Location: United States
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DaniWeb Expert
Let me know how it goes.
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Join Date: Nov 2007
Posts: 52
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Junior Poster in Training
Thanks for your help... =)
I will keep you update... Hopefully, I don't need to trouble you so much anymore... =)
I will keep you update... Hopefully, I don't need to trouble you so much anymore... =)
Serene Joey
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Join Date: Nov 2007
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Junior Poster in Training
Re: C# ASP.NET Project Idea Hi, I'm working on Switch right now.
I saw switch statements online.
but I don't know what variable I need for my case. Er can you please help?
I'm trying to use switch instead of if-else...
I saw switch statements online.
Switch (variable)
{
case 1: //do something
case 2: //do something else
break;
}but I don't know what variable I need for my case. Er can you please help?
I'm trying to use switch instead of if-else...
C# Syntax (Toggle Plain Text)
Serene Joey
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