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'Operation is not valid due to the current state of the object' error during postback
I had an aspx page which was working well, but suddenly I am getting the error "Operation is not valid due to the current state of the object." whenever a postback is done.
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Regex to test if string begins with http:// or https://
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Making this case insensitive wasn't working in asp.net so I just specified each of the letters.
Here's what I had to do to get it working in an asp.net RegularExpressionValidator:
[Hh][Tt][Tt][Pp][Ss]?://(.*)
Notes:
(?i) and using /whatever/i didn't work probably be...
How can I get the client's IP address in ASP.NET MVC?
I'm totally new to the ASP.NET MVC stack, and I was wondering what happened to the simple Page object and the Request ServerVariables object?
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Web Reference vs. Service Reference
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Add Web Reference is the old-style, deprecated ASP.NET webservices (ASMX) technology (using only the XmlSerializer for your stuff) - if you do this, you get an ASMX client for an ASMX web service. You can do this in just about any project (Web App, Web Site, Console App, Winforms - ...
“The breakpoint will not currently be hit. The source code is different from the original version.”
... back:
C:\Documents and Settings\%username%\AppData\Local\Temp\Temporary
ASP.NET Files
C:\windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET
Files
I finally resolved the problem when I discovered that a class file I had intentionally moved into a subfolder, somehow reappeared in the ro...
The type or namespace name does not exist in the namespace 'System.Web.Mvc'
...mbly references on every project in the solution, anything with "Microsoft ASP.NET\ASP.NET MVC 3\Assemblies" or the like in the path is part of the problem.
– Task
Nov 14 '14 at 16:41
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The Role Manager feature has not been enabled
...s MSDN sample: https://msdn.microsoft.com/en-us/library/aa354509(v=vs.110).aspx
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Ignoring a class property in Entity Framework 4.1 Code First
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Button Click event fires when pressing Enter key in different input (no forms)
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I was having this issue with ASP.NET WebForms:
<asp:Button />
This can NOT be solved by just adding type="button" because ASP.NET replaces it with type="submit" (you can see this behavior in the browser if you inspect the element.)
The correct ...
HTTP POST and GET using cURL in Linux [duplicate]
...ave a server application written in ASP.NET on Windows that provides a web service.
2 Answers
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