CODEWITHSUNDEEP
c#asp.net
RAKESH HOLKAR
RAKESH HOLKAR

Reputation: 2197

How can we write blank file in System.Web.HttpContext.Current.Response.WriteFile()

How can we write a blank file in C# Response Object?

I want to write a file whose path does not exist at all.

System.Web.HttpContext.Current.Response.WriteFile("blank.txt")

how can I do it?

Upvotes: 0

Views: 1688

Answers (3)

Anand
Anand

Reputation: 14915

You can not. What you can do is, make an empty file and name it "blank.txt" and keep it in your solution.

Could I know the reason for writing blank file. It is not equivalent of not writing anything in response ?

UPDATE

Building on Jon's idea, you can even simply write the HTTP headers

Response.ContentType = "text/plain";
Response.AppendHeader("Content-Disposition", "attachment;filename= errorLog.txt");
Response.AddHeader("content-length","0");
Response.Flush();


Response.End();

UPDATE 2

If you already have a errorLog.txt file, use Response.WriteFile directly

Upvotes: 1

shajivk
shajivk

Reputation: 570

You can do it this way. 

        byte[] buffer = new byte[1];
        Response.Clear();
        Response.ContentType = "text/plain";
        Response.OutputStream.Write(buffer, 0, buffer.Length);
        Response.AddHeader("Content-Disposition", "attachment;filename=blank.txt");
        Response.End();

Upvotes: 0

Jon Skeet
Jon Skeet

Reputation: 1500215

Look at what headers are sent for a non-empty file, and then simple write out the same headers yourself (changing the content length, of course) but with no data.

(I'm assuming that WriteFile does fill in some headers around the file name etc. If it doesn't, it's even simpler :)

Upvotes: 2

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