why string showing length value?

Question

1.00/5 (1 vote)

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C#

DirectoryInfo dir = new DirectoryInfo(@"D:\Temp");
FileInfo[] y = dir.GetFiles();
List<string> asx = y.Select(p => new { File = p.DirectoryName + p.Name }.ToString()).ToList();
datagridview1.datasource=asx;

why list asx showing length: 33,11,20...?????

[edit]Code block added - OriginalGriff
Fixed markup typo - Matt Heffron[/edit]

Posted 12-Apr-13 8:20am

scorpzonex

Updated 12-Apr-13 13:31pm

v5

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Sergey Alexandrovich Kryukov 12-Apr-13 16:58pm

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—SA

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OriginalGriff · Accepted Answer · 2013-04-12T08:52:00

Solution 1

For me, it doesn't:

C#

DirectoryInfo dir = new DirectoryInfo(@"D:\Temp");
FileInfo[] y = dir.GetFiles();
List<string> asx = y.Select(p => new { File = p.DirectoryName + p.Name }.ToString()).ToList();

It returns an array of strings:

C#

foreach (string s in asx)
    {
    Console.WriteLine(s);
    }

Prints:

{ File = D:\TempAA.TXT }
{ File = D:\TempAAdel.jpg }
{ File = D:\TempMyIP.aspx }
{ File = D:\TempMyPic.jpg }
{ File = D:\TempMyText.txt }
{ File = D:\TempTestingSQLite.sldb }
{ File = D:\TempThumbs.db }}

So what am I doing that you aren't, or vice versa?

BTW: You probably want to add a "\\" in there, between the directory and file names.

Posted 12-Apr-13 8:52am

OriginalGriff

Comments

scorpzonex 12-Apr-13 16:09pm

but when i'm using dataGridView1.DataSource =asx;
it shows the length not the text;

[no name] 12-Apr-13 16:42pm

Then you would need to show the real actual code that you are using. The code that you posted is not the real code as it would not even compile.

OriginalGriff 13-Apr-13 2:47am

Ah! It's not the conversion that causes the problem, it's using a List of strings as the DataSource. When you do that, the DataGridView looks at all the public Properties of the object the list is made up of, and provides a column for each of them. The only public property a string has is it's Length, so that is the column you get - a string doesn't have a "Text" property because it is *already* the text! :laugh:
You need to change what you are loading into the DataGridView - try this:
myDataGridView.DataSource = asx.ConvertAll(x => new { Value = x });
It creates a new anonymous type which has a single public property "Value" and assigns the string to that.

scorpzonex 13-Apr-13 9:09am

Thank you. Yaap that works.

OriginalGriff 13-Apr-13 9:16am

You're welcome!