“Operation is not valid due to the current state of the object.”

　　將Repeater單頁顯示的2000條資料一次性提交的時候出現這個錯誤：

 

Operation is not valid due to the current state of the object.

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: Operation is not valid due to the current state of the object.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

 

　　這是因為提交表單form時的fields集合大小限制，參考：

http://stackoverflow.com/questions/8684049/asp-net-ms11-100-how-can-i-change-the-limit-on-the-maximum-number-of-posted-for

https://technet.microsoft.com/library/security/ms11-100

 

　　解決辦法就是修改config檔案：

<appSettings>
    <add key="aspnet:MaxHttpCollectionKeys" value="5000" />
</appSettings>