how to bind multiple textfiles to gridview in asp.net

tanks for ur reply.
i have a folder contained multiple textfiles. i want to read those files and bind to gridview. i write following code

string[] files = Directory.GetFiles("E:\\DOTNET APPLICATIONS\\Asp.net\\TextfilestoGrid\\TextFolder\\");
foreach (string file in files)
{
Stream msgStream = File.Open(file, FileMode.Open, FileAccess.Read);
StreamReader sr = new StreamReader(msgStream);
string str = sr.ReadToEnd();
//ArrayList al = new ArrayList();

DataTable dt = new DataTable();
dt.Columns.Add("TextFiles");
DataRow dr = dt.NewRow();
dr["TextFiles"] = str;
dt.Rows.Add(dr);
sr.Close();
msgStream.Close();

GV.DataSource = dt;
GV.DataBind();

when ever i debug the application, all files are coming to stream object but they are not binded to gridview. output is displaying only one columnname that is "TextFiles" with no data.
plz help me;
thanking you.