| i  developing the web site for institute.my web site have the following  directory and this folder stores the audios and many file extension file in  diffrent directories.like Server.MapPath("~/maintainer/uploaded_files/Uploaded/gallery/audios/")  and Server.MapPath("~/maintainer/uploaded_files/Uploaded/syllabus/")  i want to delete the specific file when deleting the record from  gridview.when i deleting the the record in gridview,the record is  deleted but file not deleting file from directory.i using the following  source code and c#/asp code in code behind aspx.cs file  | 
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
 <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Delete" CommandArgument='<%#Eval("filename") %>' Text="Delete">
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
and in aspx.cs file
public int deleted;
    public Boolean flag = false;
    String filename;
    protected void Page_Load(object sender, EventArgs e)
    {        
    }
    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        //String capath = (sender as LinkButton).CommandArgument;
        if (!IsPostBack)
        {
            try
            {
                if (e.CommandName == "Delete")
                {
                    Label id = (Label)GridView1.FindControl("Label1");                    
                    //String dirpath = "~/maintainer/uploaded_files/Uploaded/gallery/audios/";
                    String dirpath = Server.MapPath("~//maintainer//uploaded_files//Uploaded//gallery//audios//");
                    SqlDataSource1.DeleteParameters["id"].DefaultValue = id.Text;
                    DirectoryInfo di = new DirectoryInfo(dirpath);
                    FileInfo[] fiarr = di.GetFiles();
                    foreach (FileInfo fi in fiarr)
                    {
                        if (fi.Name == e.CommandArgument.ToString())
                        {
                            fi.Delete();
                            flag = true;
                        }
                        else
                        {
                            flag = false;
                        }
                    }
                    //if (System.IO.File.Exists(Server.MapPath(e.CommandArgument.ToString())))
                    //{
                    //    System.IO.File.Delete(Server.MapPath(e.CommandArgument.ToString()));
                    //    flag = true;
                    //    int deleted = SqlDataSource1.Delete();
                    //}
                    //else
                    //{ flag = false; }
                    if (flag == true)
                    {
                        deleted = SqlDataSource1.Delete();
                        if (deleted > 0)
                        {
                            Response.Write("<script>alert('Audio File Deleted Successfully')</script>");
                            Response.Redirect(Request.Url.AbsoluteUri);
                        }
                    }
                    else
                    {
                        Response.Write("<script>alert('Audio File Not Deleted')</script>");
                    }
                }
            }
            catch (Exception ex)
            {
                Response.Write(ex.ToString());
            }
        }
    }
 thanks.