How to read and write a file in asp.net

To do this, you can again use the File object. You can use the File object to read each line individually separated by line breaks or to read individual item no matter how they're separated. This procedure shows you how to read and display the data that you created in the previous example. The code starts by reading the file that you created in the previous example into a variable named userData , using this method call:.

The code to do this is inside an if statement. When you want to read a file, it's a good idea to use the File. Exists method to determine first whether the file is available. The code also checks whether the file is empty. The body of the page contains two foreach loops, one nested inside the other. The outer foreach loop gets one line at a time from the data file.

In this case, the lines are defined by line breaks in the file — that is, each data item is on its own line. The inner loop splits each data line into items fields using a comma as a delimiter. Based on the previous example, this means that each line contains three fields — the first name, last name, and email address, each separated by a comma.

The code illustrates how to use two data types, an array and the char data type. The array is required because the File. ReadAllLines method returns data as an array. The char data type is required because the Split method returns an array in which each element is of the type char. For information about arrays, see Introduction to ASP.

You can use Microsoft Excel to save the data contained in a spreadsheet as a comma-delimited file. When you do, the file is saved in plain text, not in Excel format.

Each row in the spreadsheet is separated by a line break in the text file, and each data item is separated by a comma. You can use the code shown in the previous example to read an Excel comma-delimited file just by changing the name of the data file in your code. To delete files from your website, you can use the File. Delete method. This procedure shows how to let users delete an image. Important In a production website, you typically restrict who's allowed to make changes to the data.

For information about how to set up membership and about ways to authorize users to perform tasks on the site, see Adding Security and Membership to an ASP. This page contains a form where users can enter the name of an image file. They don't enter the.

The code reads the file name that the user has entered and then constructs a complete path. To create the path, the code uses the current website path as returned by the Server. MapPath method , the images folder name, the name that the user has provided, and ". To delete the file, the code calls the File. Delete method, passing it the full path that you just constructed. At the end of the markup, code displays a confirmation message that the file was deleted.

Enter the name of the file to delete and then click Submit. If the file was deleted, the name of the file is displayed at the bottom of the page. The FileUpload helper lets users upload files to your website. The procedure below shows you how to let users upload a single file. Add the ASP. The body portion of the page uses the FileUpload helper to create the upload box and buttons that you're probably familiar with:. The properties that you set for the FileUpload helper specify that you want a single box for the file to upload and that you want the submit button to read Upload.

You'll add more boxes later in the article. When the user clicks Upload , the code at the top of the page gets the file and saves it. The Request object that you normally use to get values from form fields also has a Files array that contains the file or files that have been uploaded. You can get individual files out of specific positions in the array — for example, to get the first uploaded file, you get Request. Files[0] , to get the second file, you get Request.

If you call this method again and pass it with the same file name, then it will overwrite the existing file completely. But in most cases, we often want to add new data to the end of the file, so we can do that by using the AppendAllText method of the file object.

Now when you open the Data. To read the data from a file, you can use the File object and then call ReadAllLines , which will read all the lines from the file. Anadi Sharma. Kaushik Roy Chowdhury. University Code. Bhrugen Patel. Like in job portals user has to fill too many fields Name, qualifications, position applied for etc is there a way that asp.

Hello Sir nice article but can you tell me how can i read specific word files I have uploaded. Hi Suresh, The below code is working only in IE. FileName; fileupload1.

SaveAs MapPath path ; if File. Exists Server. Append s ; strbuild. Can you please help me. FileName; change in above line FileName; Docs is a folder name FileName; by this u can read file from any location I want to display the content in that document file in to a textbox having the property as multiline text mode. For example: i uploaded a resume and i want to display that resume data on to a text box what is the code in c.

I taken the resume in database table of datatype as varbinary max. I have kept the uploaded resume in a folder added in my project. I m getting some Encoded data when trying to read it by streamreader or by File.

ReadAllLines path ;. Suresh, The same source code of urs is found out in below mentioned link Hey Sureshbhai , please help me bro Text' is denied. Give your Valuable Comments.