CODEWITHSUNDEEP
vb.nettextbox
Jonny
Jonny

Reputation: 97

Can I stop my textbox from crashing when loading in too much data into it?

Not sure if this is something really simple that I haven't noticed. Or just a simple try/catch (I guess most likely).

I have a textbox on a form. It takes in data from another text file which is very large (lets assume 1Mb) and in a lot of cases it can take it but in some cases the program crashes when loading the file.

How can I handle this?

Upvotes: 2

Views: 241

Answers (1)

A. Still
A. Still

Reputation: 300

You could try to read the file size of the text file before loading it into your text box. If the length of the file is greater than the capacity of your text box, you can prevent the text box from being filled.

You can use a function like File.ReadAllLines to determine the size of the text file.

    Dim AppDataLocation As String = "C:\Files\TestFiles\" 

    Dim sourceDirectoryInfo As New System.IO.DirectoryInfo(AppDataLocation) 

    For Each fileSystemInfo As System.IO.FileSystemInfo In _
                      SourceDirectoryInfo.GetFileSystemInfos 
        Dim FileText As String = System.IO.File.ReadAllText _
                      (AppDataLocation & fileSystemInfo.Name)         
    Next

Alternately, you can use FileInfo.Length as seen in this example here.

Dim file As New FileInfo("file.txt")
Dim sizeInBytes As Long = file.Length

Upvotes: 2

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