Saving Data to a Text File in VB.Net -


i've functioning streamwriter creates text file , places information need in file, whenever re-run application text file created anew current values replacing old. how ensure previous data saved in text file new data being added on it? appending data file seems obvious route, i'm not sure how incorporate code program.

dim corpid, fname, lname, preconf, confcost string         corpid = txtcorpid.text         fname = txtfirstname.text         lname = txtlastname.text         if radnotattending.checked = true             preconf = ""         else             preconf = cmbcourses.selecteditem.tostring         end if         confcost = decattendcost.tostring("c")          dim wr streamwriter         wr = new streamwriter("c:\users\anon\documents\sampletextfile.txt")         wr.writeline(string.format("{0},{1},{2},{3}, {4}", corpid, fname, lname, preconf, confcost))         wr.flush()         wr = nothing

you need overload of streamwriter constructor.

just use wr = new streamwriter("c:\users\anon\documents\sampletextfile.txt", true)

you need this one

example:

using wr new streamwriter("c:\users\anon\documents\sampletextfile.txt",true)     wr.writeline($"{corpid},{fname},{lname},{preconf},{confcost}) end using

with using, streamwriter released when done it, when click button again, no streamwriter accessing file , can create insatnce of streamwriterwithout problems.


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