尝试从XMl文件中检索数据但是我在文件正在使用时收到错误(Trying to retrieve data froman XMl file but I get the error as file is

尝试从XMl文件中检索数据但是我在文件正在使用时收到错误(Trying to retrieve data froman XMl file but I get the error as file is in use)

我正在尝试从Xml中检索数据。我是编程的新手所以请原谅我。

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(); }

我在浏览器上遇到的错误是：

“该进程无法访问文件'E：\ Programming stuff \ Work \ website \ XMLFile.xml'，因为它正由另一个进程使用。”

你能帮我识别一下正在访问该文件的其他进程吗？

编辑：更改代码后：

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); } } }

错误：“当前上下文中不存在名称'MyReadXml'”

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"

最满意答案

始终close并dispose流（尝试使用块）。重新启动你的appserver（werserver），看看会发生什么？

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(); } }

注意：如果XMLFile.xml放在website的根目录下，则使用Server.MapPath()方法从虚拟路径获取绝对文件路径。

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

如果要以编程方式添加ASP.NET服务器控件，请将PlaceHolder控件添加到.aspx文件中，并调用PlaceControl1.Controls.Add(DataGrid1)方法。

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); }

编辑：

我仍然得到错误“MyReadXml不存在”我做错了什么？

你已经终止了使用块。请删除分号。

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

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: