Grid View Row Data Bound event - asp.net

Question

I can't run on IIS Server. I write with dynamically create link button in gridvew row data bound and Link button can't redirect access to file server. I only can on visual studio. Please let me know, how to solve it.
protected void GVSample_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.`enter code here`RowType == DataControlRowType.DataRow)
{
string variable = e.Row.Cells[8].Text.ToString();
string[] stringSeparators = { ";" };
string[] result;
result = variable.Split(stringSeparators, StringSplitOptions.None);
foreach (string s in result)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
LinkButton lb = new LinkButton();
lb.Text = s.ToString() + "<br />";
lb.CommandName = "ApproveVacation";
lb.Command += LinkButton_Command;
e.Row.Cells[8].Controls.Add(lb);
}
}
}
}
protected void LinkButton_Command(object sender, CommandEventArgs e)
{
string val = ((LinkButton)sender).Text;
int row = -1;
int.TryParse(e.CommandArgument as string, out row);
if (row == -1)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "displayalertmessage", "alert('Fail to Open File');", true);
return;
}
GridViewRow gdrow = GridView1.Rows[row];
DataRow dr = ((DataTable)this.GridView1.DataSource).Rows[gdrow.DataItemIndex];
if (e.CommandName == "ApproveVacation")
{
try
{
string username = "Bla";
string password = "bla";
System.Net.NetworkCredential readCredentials = new NetworkCredential(username, password);
string filepath = #"\\192.168.1.100\SAPAttachments\abc";
using (new NetworkConnection(filepath, readCredentials))
{
WebClient User = new WebClient();
string file = ((LinkButton)sender).Text;
string a = #"<br />";
file = file.Replace(a, "");
foreach (var item in file)
{
Byte[] FileBuffer = User.DownloadData(file);
string stringCutted = file.Substring(file.LastIndexOf(".") + 1);
if (stringCutted == "docx" || stringCutted == "DOCX")
{
if (FileBuffer != null)
{
Context.Response.Clear();
FileInfo Sourcefile = new FileInfo(file);
Context.Response.ContentType = "Application/msword";
Context.Response.AppendHeader("Content-Disposition", "inline; filename=" + Sourcefile.Name);
Context.Response.AppendHeader("Content-Length", Sourcefile.Length.ToString());
Context.Response.WriteFile(Sourcefile.FullName);
Context.Response.End();
}
}
if (stringCutted == "pdf" || stringCutted == "PDF")
{
if (FileBuffer != null)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", FileBuffer.Length.ToString());
Response.BinaryWrite(FileBuffer);
Response.End();
}
}
if (stringCutted == "jpg" || stringCutted == "JPG" || stringCutted == "jpeg" || stringCutted == "JPEG")
{
if (FileBuffer != null)
{
Response.ContentType = "image/jpeg";
Response.AddHeader("content-length", FileBuffer.Length.ToString());
Response.BinaryWrite(FileBuffer);
Response.End();
}
}
}
ScriptManager.RegisterStartupScript(this, this.GetType(), "displayalertmessage", "alert('Success');", true);
}
}
catch
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "displayalertmessage", "alert('Fail to Open File');", true);
}
}
}