A looping Question

WestSideRailways

If someone could show me how i can loop the following code until end of the text file. This would be much appreciated.:)

 Dim FileReader As System.IO.StreamReader
        FileReader = My.Computer.FileSystem.OpenTextFileReader("C:\\SBL.txt")
        Dim StringReader As String
        StringReader = FileReader.ReadLine
        Form2.ListView1.Items.Add(StringReader)

Christian Graus

StringReader is a strange name for a string ? Anyhow, you use a while loop. your string will return null ( Nothing in VB ) when the file is empty. Or you can use ReadAllText to get the strings out as a string array and use for each to iterate over that.

Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog

TwoFaced

Do While Not FileReader.EndOfStream StringReader = FileReader.ReadLine Form2.Listview1.items.add(StringReader) Loop

WestSideRailways

Christian Graus wrote:

StringReader is a strange name for a string ?

It's name is what it does, so i think that the name is relevant.:-D

Christian Graus

It's also the name of a class, I believe. It threw me for a second, that's all.

Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog

WestSideRailways

TwoFaced wrote:

Do While Not FileReader.EndOfStream StringReader = FileReader.ReadLine Form2.Listview1.items.add(StringReader) Loop

This works like a charm :-D THANKS Now for another question... Is there any way to input horizonaly in a Listview box? Or is this just a matter of Formatting?. All my data is going down instead of across. I am viewing the Listview Box with Details set as true and Columns Headers ready and waiting.

WestSideRailways

Christian Graus wrote:

It's also the name of a class, I believe. It threw me for a second, that's all.

Hmm, will have to check into that:) THANKS

TwoFaced

Yes, you would first add an item (the leftmost item). The 'Add' method returns a listviewitem so you can get a reference to it by writing this:

Dim item As ListViewItem = ListView1.Items.Add(StringReader)

Then to add an item to the next column you would use this:

item.SubItems.Add(SubItem)

That's basically what you need to know.

WestSideRailways

TwoFaced wrote:

Then to add an item to the next column you would use this: item.SubItems.Add(SubItem) That's basically what you need to know.

THANKS Again:cool: Have just been doing some more reading about Listview Boxs and have just figured out that what you have said is what i need to do.;)

WestSideRailways

This is my Code so far.....

  Do While Not FileReader.EndOfStream
        StringReader = FileReader.ReadLine
        Form2.ListView1.Items.Add(StringReader)
        'Adding Subitems
        Dim item As ListViewItem = Form2.ListView1.Items.Add(StringReader)
        Dim i As Integer
        For i = 0 To 5
            item.SubItems.Add(StringReader)
        Next
    Loop

Just a little bit of fine tuning....:) What is happening is that the first item on the left is in the right spot, after that what should be the first sum-item it duplicated in the left column. Then in the 3rd row this same item is in all the sub-item columns. And the same thing happens to all the other sum-items, which then knoks out of wack all the other data. It is surprising how writing something out and then thinking about it , you can come up with an answer;):doh: AND THE ANSWER is :- move the Stringreader line into the for next loop and get rid of the line :- Form2.ListView1.Items.Add(StringReader) as you don't need it twice in the code. -- modified at 5:52 Monday 12th February, 2007

Guffa

WestSideRailways wrote:

It's name is what it does

No, actually it's not. :) The string object doesn't read anything. It only contains data that was read. If you want to write less confusing code, you should name the variable after what it contains or what it's used for, not after what some part of the code does when it uses the variable. Also, variables are generally not named with the first letter in capital, to distinguish them from classes and methods, and using data types in variable names is generally discouraged.

--- single minded; short sighted; long gone;

WestSideRailways

Guffa wrote:

No, actually it's not. The string object doesn't read anything. It only contains data that was read.

Then maybe it should be called StringHolder or StringContainer:laugh::laugh::laugh: OPPS forgot to take the CAPS LOCK off:):)

Guffa

WestSideRailways wrote:

Then maybe it should be called StringHolder or StringContainer

It doesn't contain a string, it is a string. Well, actually it's a reference to a string, but that's implied as reference type variables always are references. It contains a line of text. What's wrong will calling it "line"? :)

--- single minded; short sighted; long gone;