error input string not in correct format

Question

1.00/5 (1 vote)

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Hi,

i am just trying to create a file with its name as current date and checking whether the file is existing or not.if existing i am writing some text to the file otherwise i am appending some data to the file.

the code i wrote is

C#

StringBuilder  log=new StringBuilder ();
            
            string path= string.Format(@"C:/Documents and Settings/aj99823/Desktop/project/{yyyy-mm-dd}.txt",System.DateTime .Now .Date);
            
            if (!File.Exists(path))
            {
                log = new StringBuilder (path);
                File.WriteAllText(path, commaDelimitedText.ToString ()); 
            }
            else
            {
                File.AppendAllText(path, commaDelimitedText.ToString());
            }

its giving me error saying input string is not in correct format...
can anyone pleae help me...........??????

Posted 14-Mar-12 20:30pm

amaljosep

Updated 14-Mar-12 20:33pm

member60

v2

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2 solutions

Solution 1

Error is due to casting issue at path string construction. Updated code should be:

C#

string path= string.Format(@"C:/Documents and Settings/aj99823/Desktop/project/{yyyy-mm-dd}.txt",System.DateTime.Now.ToString("yyyy-MM-dd ));

It should work.

Posted 14-Mar-12 20:41pm

Ganesan Senthilvel

Comments

amaljosep 15-Mar-12 2:47am

no ...its throwing the same error again....

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youssef_123 · Accepted Answer · 2012-03-14T20:54:00

Solution 2

look man i solve it; i try it locally and i get the same error and the new modifications are below:

C#

StringBuilder log = new StringBuilder();

        //string path = string.Format(@"C:\Tester\Lottery_Windows\{yyyy-mm-dd}.txt", System.DateTime.Now.Date);
        string path = @"C:/Documents and Settings/aj99823/Desktop/project/" + DateTime.Now.ToString("yyyy-MM-dd");

        if (!File.Exists(path))
        {
            log = new StringBuilder(path);
            File.WriteAllText(path, "Hello World");
        }
        else
        {
            File.AppendAllText(path, "Hello World");
        }

if this help you please rate
best regards

Posted 14-Mar-12 20:54pm

youssef_123

Comments

amaljosep 15-Mar-12 3:01am

yes...its working....thanks a looooooot for helping me.....

youssef_123 15-Mar-12 3:03am

you are welcome but plzz can you rate for meeee

youssef_123 15-Mar-12 3:04am

and improve solution for others if they faced the same problem

amaljosep 15-Mar-12 3:28am

see i need to confirm my email address for doing the rating......will surely do it in the evening...

youssef_123 15-Mar-12 4:03am

ok