#Windows forms application txt write code#

This code creates a file that is named Test.txt on drive C. On the Debug menu, select Start to compile and to run the application. Sw.WriteLine('From the StreamWriter class') StreamWriter sw = new StreamWriter('C:\Test.txt') Pass the filepath and filename to the StreamWriter Constructor The WriteLine method writes a complete line of text to the text file.Īdd the following code to the Main method: try In a similar way to the StreamReader class, you can pass the path of a text file to the StreamWriter constructor to open the file automatically. The following code uses the StreamWriter class to open, to write, and to close the text file. The Console window displays the contents of the Sample.txt file： Hello world Continue to read until you reach end of fileĬonsole.WriteLine('Exception: ' + e.Message) Ĭonsole.WriteLine('Executing finally block.') StreamReader sr = new StreamReader('C:\Sample.txt') Pass the file path and file name to the StreamReader constructor Select Visual C# Projects under Project Types, and then select Console Application under Templates.Īdd the following code at the beginning of the Class1.cs file: using System.IO Īdd the following code to the Main method: String line On the File menu, point to New, and then select Project. For more information, see StreamReader Class.Ĭreate a sample text file in Notepad. When the ReadLine method reaches the end of the file, it returns a null reference. The ReadLine method reads each line of text, and increments the file pointer to the next line as it reads. You can pass the path of a text file to the StreamReader constructor to open the file automatically. The following code uses the StreamReader class to open, to read, and to close the text file.

#Windows forms application txt write how to#

The Write a text file (example 1) and the Write a text file (example 2) sections describe how to use the StreamWriter class to write text to a file. The Read a text file section of this article describes how to use the StreamReader class to read a text file. Original product version: Visual Studio Original KB number: 816149 Summary Keep in mind that I am a VERY new beginner and I have to constantly refer to my VB dictionary (that I created using MSDN help) to refresh myself on the definition of various VB terms and concepts.This article helps you read from and write to a text file by using Visual C#.

#Windows forms application txt write update#

Two variables (a) and (b) and return them, and then update the textbox with the returned value. That is, let the Function code figure out the Maybe I should be using a Function instead of a subroutine. In my application, the textbox number varies (depending on the logic) and the value to write in the box also varies (depending on the logic). I moved thisĬommand to the Main subroutine and it did update the textbox!!

I tried using TextBox13.Text = '5' at the end of my subroutine, but it would not display the value in the textbox. I am currently using a subroutine to find out two things: (a) Which textbox control to write to, and (b) which value to write to that text box.Īfter figuring out these two things, I want to write the value into a specific textbox.