in my page i use button and webdropdown controls, when i press the button i got the following error. Please help me to fix it, it's urgent. I'm looking forward to your answer.
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.
Stack Trace:
[InvalidOperationException: Operation is not valid due to the current state of the object.]
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeDictionary(Int32 depth) +542066
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth) +147
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeList(Int32 depth) +119
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth) +210
System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer) +51
System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit) +37
System.Web.Script.Serialization.JavaScriptSerializer.DeserializeObject(String input) +13
Infragistics.Web.UI.Framework.ObjectBase.LoadCollectionsStateFromViewState() +182
Infragistics.Web.UI.Framework.RunBot.HandleLoadViewState() +61
Infragistics.Web.UI.ListControls.ListControl.LoadViewState(Object savedState) +162
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +183
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +218
System.Web.UI.Page.LoadAllState() +312
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
Version Information: Microsoft .NET Framework Version:2.0.50727.4963; ASP.NET Version:2.0.50727.4971
Hello ThuyNga Nguyen,
Can you please share the code you are executing on button click? A small sample, reproducing the issue would also be helpful. Thank you.
Please let me know if you still need assistance with the matter.