The TxtAmountA.Text is a string. You are attempting to set the variable intAmountA which is an integer to a string value, thus the error. You need to parse the integer out of the string in the textbox. However, be aware that if what is in TxtAmountA.Text is not something that can be cast to an … Read more
System.Environment.NewLine is the constant you are looking for – http://msdn.microsoft.com/en-us/library/system.environment.newline.aspx which will provide environment specific combination that most programs on given OS will consider “next line of text”. In practice most of the text tools treat all variations that include \n as “new line” and you can just use it in your text “foo\nbar”. Especially … Read more
Is it possible that the serverSocket is being closed from another thread? That will cause this exception.
I need to create a method of class that delete the instance. I want to know if there is any possible solution (even if it is not recommended) how to do this. Instance of this class will be stored in hundreds of different class. I will try to describe this, for example there will be … Read more
Well, you’re trying to open the file file_no.txt for reading and for writing using separate streams. This may not work as the file will be locked by the reading stream, so the writing stream can’t be created and you get the exception. One solution would be to read the file first, close the stream and … Read more
“External table is not in the expected format.” typically occurs when trying to use an Excel 2007 file with a connection string that uses: Microsoft.Jet.OLEDB.4.0 and Extended Properties=Excel 8.0 Using the following connection string seems to fix most problems.
Try this: In C#, arrays have a Length property, anything implementing IList<T> (including List<T>) will have a Count property.
.*[^a-zA-Z0-9_].* will match the entire input as long as there is a non-alphanumeric/underscore somewhere in the input. [^a-zA-Z0-9_] will match only a single non-alphanumeric/underscore character (most likely the last one, if you’re using the default greedy matching) if it is somewhere in the input. Which one you want depends on the input and what you want to do … Read more
It is an integer literal – it’s the hex number 80, which is decimal 128. The “0x” prefix indicates it being in hex. For more details, look at the section 2.4.4.2 of the C# language specification: “Integer literals”.
The simplest way to achieve this is: using String.Join Hope this helps.