Question

I’m trying to retrieve data from an Xml. I’m a newbie into programming so please pardon me.

  protected void Page_Load(object sender, EventArgs e)
  {

    string MyXmlFile= @"E:\\Programming stuff\\Work\\website\\XMLFile.xml";    
     DataSet ds= new DataSet();

    System.IO.FileStream MyReadXml= new System.IO.FileStream(MyXmlFile, System.IO.FileMode.Open);

    ds.ReadXml(MyReadXml);

    DataGrid DataGrid1 = new DataGrid();

    DataGrid1.DataSource = ds;
    DataGrid1.DataBind();
   }

The error I get on the browser is:

“The process cannot access the file ‘E:\Programming stuff\Work\website\XMLFile.xml’ because it is being used by another process.”

Can you help me identify which is that other process that is accessing the file?

Edit: After the changes to the code:

protected void Page_Load(object sender, EventArgs e)
{
  if(!IsPostBack) 
  {
    string MyXmlFile= Server.MapPath("~/XMLFile.xml");    


   using(System.IO.FileStream MyReadXml= new System.IO.FileStream(MyXmlFile,System.IO.FileMode.Open));
    {
 DataSet ds= new DataSet();
ds.ReadXml(MyReadXml);

DataGrid DataGrid1 = new DataGrid();

DataGrid1.DataSource = ds;
DataGrid1.DataBind();
PlaceHolder1.Controls.Add(DataGrid1);
    }
}
}

Error: “The name ‘MyReadXml’ does not exist in the current context”

Answer 1

Always close and dispose the stream (try using block). restart your appserver (werserver) and see what happen?

if(!IsPostBack)
{
 string MyXmlFile= @"E:\\Programming stuff\\Work\\website\\XMLFile.xml";    
 using(System.IO.FileStream MyReadXml=System.IO.File.OpenRead(MyXmlFile))
  {
    DataSet ds= new DataSet();
    ds.ReadXml(MyReadXml);
    //Add DataGrid control markup in .aspx.
    DataGrid1.DataSource = ds.Tables[0];
    DataGrid1.DataBind();
  }
 }

NOTE: If XMLFile.xml is placed under the root of website then use Server.MapPath() method to get absolute file path from virtual path.

string MyXmlFile= Server.MapPath("~/XMLFile.xml"); 

If you want to add ASP.NET server control programatically then add PlaceHolder control into .aspx file and call the PlaceControl1.Controls.Add(DataGrid1) method.

string MyXmlFile= @"E:\\Programming stuff\\Work\\website\\XMLFile.xml";    
     using(System.IO.FileStream MyReadXml=System.IO.File.OpenRead(MyXmlFile))
      {
        DataSet ds= new DataSet();
        ds.ReadXml(MyReadXml);
        DataGrid DataGrid1=new DataGrid();
        DataGrid1.DataSource = ds.Tables[0];
        DataGrid1.DataBind();
        PlaceHolder1.Controls.Add(DataGrid1);
      } 

EDIT:

I still get the error as “MyReadXml does not exist” Did I do anything wrong?

You’ve terminated the using block. Please remove the semi-colon.

using(System.IO.FileStream MyReadXml=new   
     System.IO.FileStream(MyXmlFile,System.IO.FileMode.Open))
    {
     ...
    }