ADO.NET :: Getting Error - System.InvalidOperationException: Operation Is Not Valid
Mar 29, 2011
I am using static class to do every job related to Database. In this class Connection Object is static but i am creating command object in the method. I read a form post here [URL] about creating connection object local. If we do like that how can we use Connection pooling? There is an example code below.
I am creating a connection object with pooling (Validate Connection=True; Min Pool Size=10; Max Pool Size=200; Incr Pool Size=10; Decr Pool Size=5;). I am expecting to use connection pool by static connection object (this obje has a connection poll) with dynamicly created commands. Am I wrong? Sometimes i am getting "System.InvalidOperationException: Operation is not valid due to the current state of the object." error. Is it because static connectin object?
I am facing some problem when i try to see my report in report server.
I publish my report in report server. when i call http://localhost/Reportserver/ i can see all my reports perfectly. But when i try to see my report using http://localhost/Reports/ and click on my report it gives a SSRS error "Operation is not valid due to the current state of the object".
System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open() at _default.commentCount(Int32 ArtID) at ASP.default_aspx.__DataBind__control4(Object sender, EventArgs e)....
I thought I had closed all the connections in my code:
I'm trying to set up a page that will allow users to download files from a shared drive (where the file is actually sent via the page). So far this is what I have.
public partial class TestPage : System.Web.UI.Page { protected DirectoryInfo dir; protected FileInfo[] files; protected void Page_Load(object sender, EventArgs e) { dir = new DirectoryInfo(Server.MapPath(@"\sharedDrivePublic")); files = dir.GetFiles(); } }
The aspx page looks kind of like this:
<% Response.Write(System.Security.Principal.WindowsIdentity.GetCurrent().Name); %> <ul> <% foreach (System.IO.FileInfo f in files) { Response.Write("<li>" + f.FullName + "</li>"); } %> </ul>
When I remove the erroneous parts of the code, the page tells me that the Windows Identity I'm using is my user (which has access to the drive). I don't understand what the problem could be or what it's even complaining about.
I'm facing a very serious issue like application is throwing an error "Operation is not valid due to current state of an object" when have a post back. My page has a grid view with text box inside without paging because it's a delivery page, I was googling and understood this error can over come by addingÂ
<appSettings><addkey="aspnet:MaxHttpCollectionKeys"value="2001"/></appSettings> in web.config file, I added the same with more value, but system is still throwing the same error.
Invalid attempt to read when no data is present.Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Invalid attempt to read when no data is present.Source Error:
I am using VSTO 2010. On my aspx page, I have nested modalpopup.
But, I got error as:
Microsoft JScript runtime error: Sys.InvalidOperationException: Two components with the same id 'MainContent_ContentPlaceHolder2_EditProceduresName_ModalPopupExtender' can't be added to the application.
My website (VWD 2008 Express) has been running for some time with no error. Something has become corrupted,I am getting the error message "Error: Sys.InvalidOperationException: The path to the web service has not been set." when attempting to use the default authentication message.Nothing has changed in the script manager specification on the page.
I have a web service which tries to connect to the SQL server.It uses Integrated security = true.I get the Conn.ServerVersion threw an exception of type System.InvalidOperationException as soon as the connection object is instatiated.
have a problem on my application, i am using LightBox javascript that is using prototype.js library, and when i open any pop up that is having script manager it generate this error:Microsoft JScript runtime error: Sys.InvalidOperationException: The PageRequestManager cannot be initialized more than once.I know that is because i have scriptmanager on the parent page that opened the pop up and its something relates to prototype.js but i dont know the connection!
I have a web page that uses System.Net.HttpWebRequest class that used to work perfectly fine for 2 years, and then all of a sudden I started to get the following error.[WebException: The operation has timed out] System.Net.HttpWebRequest.GetResponse() +5314029Also, I tried the application on my local machine and it works fine, do you think it is a setting change on my hosting server?I already tried the response.close and it didn't work.
I want to remove checked items from checklistbox (winform control) in class file method which i am calling asynchronously using deletegate. but it showing me this error message:-
Cross-thread operation not valid: Control 'checkedListBox1' accessed from a thread other than the thread it was created on.
i have tried invoke required but again got the same error. Sample code is below:
Hopefully I am just overlooking something incredibly simple, if so I apologize....I have an ASP.NET application in .NET4 and we're trying to use URL rewriting using
For some reason intellisense is returning an error which says that <rewrite> is not a valid child element of <system.webserver>When I build it and run it, it says something akin to "Error at line 0 in web.config"If I remove all the <rewrite> lines it works properly (but of course no rewriting)Is there a switch I need to flip on or something? It has to be something I'm stupidly overlooking....
I've got a list of teams which seperate into different leagues. I'm trying to show the user the league that they are in and show it from where they are in the league. This is the error I'm recieving:Specified cast is not valid. Description:An unhandled exception occurred during the execution of the current web request.Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.InvalidCastException: Specified cast is not valid.Source Error:
I get this Microsoft .NET Framework start up error. when i try to run a window project.
i am working on visual studio2005 (.NET FRAMEWORK2.0).
i am working on win 7 machine & i am not able to edit machine.config file.coz it is read only type.
below is the error ....
See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
Exception Text
System.ArgumentException: Parameter is not valid. at System.Drawing.Bitmap..ctor(String filename) at HumanHistology.frmquiz1.FillOptions() at HumanHistology.frmquiz1.btnnext_Click(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
I have text box get data from dataread. Here my code:
OleDbCommand com = new OleDbCommand("select sid from TableOne where pid = " + "'" + PID.SelectedValue + "'" + " and gid = " + "'" + GID.SelectedValue + "'" + " and unitid = " + "'" + tid.SelectedValue + "'"); ........ ........ Txtsid.Text = myDataReader[0].ToString().Trim();
I got the run time error at line: Txtsid.Text = myDataReader[0].ToString().Trim(); Invalidoperationexception was unhandled by user code. No data exists for the row/column. How to try catching those errors?
in my case, It is the windows service which in running the long running insert/update on a table and I need to cancel the operation from my ASP.NET application. In the above link Burnsys suggests that one should kill the Sql server session. Is that really only way and a goood practice to do this? Also, in the same poset can use SqlCommand.Cancel to cancel. However, I am not sure how can I cancel the command from the windows service from ASP.NET application.
