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How to open ms excel file in C#. maheesh6-Jul-09 1:26 maheesh 6-Jul-09 1:26  Dear All, How to open ms excel file in C#. And How to read and Write the data in the Xl Sheet. Please kindly needful.Thanks in advance With Regards Mahesh Re: How to open ms excel file in C#. fly9046-Jul-09 1:34 fly904 6-Jul-09 1:34  Common sense.[^] If at first you don't succeed, you're not Chuck Norris. 'Red Cross' is displayed for non-admin user Sifar - 06-Jul-09 0:31 Sifar - 0 6-Jul-09 0:31  Hi All, I am re-posting this question with some more detail. In my windows application I am using 'Zedgraph' dll for displaying graph. In my code I am not using multithreading anywhere. On some of the systems (Windows XP) it shows unhandled exception 'System.InvalidOperationException' (object is currently in use elsewhere). And the instead of graph it just shows RED CROSS. At client side network, if the user is an Administrator then the application runs fine. But if the user is not an Administrator then after few seconds above error is being observed. That means non-admin user can view the graph only for few seconds during starting of the application. Any idea... I have googled about this issue but I found that it may be due to Multithreading and I am not using it anywhere. Any suggestion would be helpful... Regards, -SIFAR. Re: 'Red Cross' is displayed for non-admin user Hariharan.T6-Jul-09 0:58 Hariharan.T 6-Jul-09 0:58  Check the event viewer for any permission errors as you mentioned the administrators doesnt have any issues in viewing the graph... Hariharan.T Re: 'Red Cross' is displayed for non-admin user Sifar - 06-Jul-09 1:02 Sifar - 0 6-Jul-09 1:02  Thanks Hariharan, But a non-admin user can view the graph for few seconds when the application starts. After that the 'Red Cross' appears... Regards, -SIFAR. How to create new winform with code(without template winform existed)? mctramp1685-Jul-09 23:52 mctramp168 5-Jul-09 23:52  we often create a winform manually(project-->add-->winform),the created winform is template, then we create an instance of this winform with "new" word. Now I want to know how to create a new winform with code and have not template winform of this new winform(that is no need create a template winform by manually first). Re: How to create new winform with code(without template winform existed)? stancrm5-Jul-09 23:55 stancrm 5-Jul-09 23:55  Form form = new Form(); form.Show(); ... Re: How to create new winform with code(without template winform existed)? Luc Pattyn6-Jul-09 0:10 Luc Pattyn 6-Jul-09 0:10  Hi, there is no magic involved: all that Visual Designer does is put some code in a file called myForm.Desisgner.cs; you can open that file and have a look; then create similar code in your own file (don't edit the designer.cs files, your changes may get lost, and might confuse Visual Designer). Luc Pattyn [Forum Guidelines] [My Articles] The quality and detail of your question reflects on the effectiveness of the help you are likely to get. Show formatted code inside PRE tags, and give clear symptoms when describing a problem. how can i avoid this error while working on c# form application?? CoderForEver5-Jul-09 23:29 CoderForEver 5-Jul-09 23:29  i waz working on a c# project on windows 7......... when i run or debug the code ...... and if there is a compile time error, it will display the errors...........but after i correct this errors.......there will be a permanent error which says..........."Cant find C:\......\\ProjectName.pdb access denied".....pdb=program debug database.......but this error disappears only if i restart my laptop........ so please help me ppls....which save my time rather than restarting my pc if some error happens....tnx Re: how can i avoid this error while working on c# form application?? Hariharan.T5-Jul-09 23:31 Hariharan.T 5-Jul-09 23:31  Check if the pdb is readonly or do a rebuild it might help Hariharan.T Re: how can i avoid this error while working on c# form application?? CoderForEver6-Jul-09 20:39 CoderForEver 6-Jul-09 20:39  i already cheked it ..... it is not read only...but i will try to rebuild it again....tnx.....by z way wat is z difference betwen....release ...and debug....i realy dont know what release do..... Re: how can i avoid this error while working on c# form application?? Dinesh Mani5-Jul-09 23:56 Dinesh Mani 5-Jul-09 23:56  This generally happens when you make changes to your code when the application is running in debug mode. Since the code has been modified, VS block access to the pdb file and you get a access denied to the .pdb file. You have the following solutions to this problem 1. As Hariharan had said, do a Rebuild of the solution. This in most cases clears the lock on the pdb file. 2. Locate the pdb file using the windows explorer and delete it and then try build/rebuild from the VS. If you get file is being used error, check if there are any process that are using this file still running using the task manager / process explorer and kill it and re-try. 3. Do a build/rebuild of the solution in "Release" mode and then do a build in "Debug" mode. Not sure if this would work for C# Win Forms, I've done this only on my Web apps. Re: how can i avoid this error while working on c# form application?? ScottM16-Jul-09 6:51 ScottM1 6-Jul-09 6:51  I had this same problem with Windows 7 beta, the problem was intermittent and I'm not sure what was causing it. Do you run Visual Studio as administrator? The problem seems to have been solved since Windows 7 release candidate. Re: how can i avoid this error while working on c# form application?? CoderForEver6-Jul-09 20:44 CoderForEver 6-Jul-09 20:44  u can c z solutions to ma problem....& try zem....as zey said..lol Interop call fails when ran from Scheduled tasks Hariharan.T5-Jul-09 23:19 Hariharan.T 5-Jul-09 23:19  I have a simple C# exe. It internally has some calls to custom interop. I dont have any problem in executing it manually by either double clicking the exe or thru command prompt, everything works as expected. But the moment i launch it using windows scheduled task it always fails. Is this a know problem with interop calls, when an executable runs thru scheduled task? it fails at the point where i make a method call on the interop object. BTW i am using W2K. Any suggestion/solution? Thanks in advance.... Hariharan.T Re: Interop call fails when ran from Scheduled tasks SeMartens5-Jul-09 23:22 SeMartens 5-Jul-09 23:22  Maybe this is a security issue? Are you using the same user for the scheduled task, as for the manually execution? Regards Sebastian It's not a bug, it's a feature! Check out my CodeProject article Permission-by-aspect. Me in Softwareland. Re: Interop call fails when ran from Scheduled tasks Hariharan.T5-Jul-09 23:26 Hariharan.T 5-Jul-09 23:26  Thanks for the reply... i do use the same user, and its part of the administrator group. Even i added it to few local security policy settings but didnt help. If you are aware of any security policy related to scheduled taks pls share.. Hariharan.T Re: Interop call fails when ran from Scheduled tasks SeMartens5-Jul-09 23:31 SeMartens 5-Jul-09 23:31  Does your app write a log? This could be helpful to get the problem... It's not a bug, it's a feature! Check out my CodeProject article Permission-by-aspect. Me in Softwareland. Re: Interop call fails when ran from Scheduled tasks Hariharan.T5-Jul-09 23:39 Hariharan.T 5-Jul-09 23:39  It has a log but doesnt help much, empty exeption It doesnt fail where i create the actual COM component in the interop instead it fails when i make call using the interop object. FYI the object is valid and not null Hariharan.T Re: Interop call fails when ran from Scheduled tasks SeMartens6-Jul-09 0:16 SeMartens 6-Jul-09 0:16  What type of exception do you get? Did you took a look in the system event table? It's not a bug, it's a feature! Check out my CodeProject article Permission-by-aspect. Me in Softwareland. Re: Interop call fails when ran from Scheduled tasks Hariharan.T6-Jul-09 0:53 Hariharan.T 6-Jul-09 0:53  Event table doesnt have any error neither in Security nor in System. Just found the exception has been suppressed in the log file. i am in the process of rebuilding it to get the exact exception. Hariharan.T How to get Current User IP Address for my Intranet site kish205-Jul-09 23:12 kish20 5-Jul-09 23:12  Hi All, Can u help me how to get current user IP Address for my Intranet Site, I have tried with below codes but its not working when i place my page in live server.... i)HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"] this is working locally when i place in server its showing default gateway for that system ii)Request.ServerVariables["REMOTE_Host"] could you plz help me to fix my issue. Re: How to get Current User IP Address for my Intranet site Dinesh Mani6-Jul-09 0:06 Dinesh Mani 6-Jul-09 0:06  Try these 1. Request.Params["REMOTE_ADDR"] 2. Request.UserHostAddress() 3. Request.ServerVariables("HTTP_X_FORWARDED_FOR") HTTP_X_FORWARDED_FOR would return an list of IP address if the client is accessing the website though a proxy server / gateway server. In such cases use the below code - ip=Request.ServerVariables("HTTP_X_FORWARDED_FOR") ; if (!string.IsNullOrEmpty(ip)) { string[] ipRange = ip.Split(','); int le = ipRange.Length - 1; string trueIP = ipRange[le]; } Re: How to get Current User IP Address for my Intranet site Luc Pattyn6-Jul-09 0:14 Luc Pattyn 6-Jul-09 0:14  Hi, maybe this[^] will help you. Luc Pattyn [Forum Guidelines] [My Articles] The quality and detail of your question reflects on the effectiveness of the help you are likely to get. Show formatted code inside PRE tags, and give clear symptoms when describing a problem. Ajax collapsible Panel not working for Master page kish205-Jul-09 22:59 kish20 5-Jul-09 22:59  Hi, Iam using Ajax collapsible panel in my web page page (C# and Asp.NET), In Master page iam using Script manager instead of using in every page, If i use script manager in master page the callapsible panel is not working, and i checked with anathor scenario by removing the master page and placing the script manager in my page seperately that's working fine, can u give any soln to fix my issue by using script manager in master page.

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