[Mono-dev] AJAX Control Toolkit and System.NullReferenceException

[Jens Wurster]

Hello,

 

sorry, but I just want to know if there is any fix for this error? 

 

@Miguel: I have send you two emails with some files, but I have never got

an answer. Have you received my emails?

 

I would be very happy about a quick feedback. Thx.

 

Jens

 

> Hello Jens,

> 

>    Do you have a self-contained test case that we could use to

> reproduce the problem?

> 

>> Hello,

>> 

>> 

>> 

>> I am currently testing the "AJAX Control Toolkit". There are no

>> problems with most of the controls, only a couple of

>> 

>> doesn't work at the moment. I want to use this Toolkit, so I am

>> anxious to fix the occurring errors. I am new to mono,

>> 

>> so it's sometimes not easy to find and solve the problems. So far I

>> have fixed two issues (maybe somebody of the 

>> 

>> development team want to know more about this?!).

>> 

>>  

>> 

>> Now, I am at a loss to fix the following error, can somebody help me,

>> please. =)

>> 

>>  

>> 

>> System.NullReferenceException: Object reference not set to an instance

>> of an object

>> 

>>   at System.ComponentModel.EditorAttribute..ctor (System.Type type,

>> System.Type baseType) [0x00000]

>> in
/root/mono-svn/mcs/class/System/System.ComponentModel/EditorAttribute.cs:61 

>> 

>>   at <0x00000> <unknown method>

>> 

>>   at (wrapper managed-to-native)

>> System.MonoCustomAttrs:GetCustomAttributesInternal

>> (System.Reflection.ICustomAttributeProvider,System.Type,bool)

>> 

>>  at System.MonoCustomAttrs.GetCustomAttributesBase

>> (ICustomAttributeProvider obj, System.Type attributeType) [0x00000]

>> in /root/mono-svn/mcs/class/corlib/System/MonoCustomAttrs.cs:82 

>> 

>>   at System.MonoCustomAttrs.GetCustomAttributes

>> (ICustomAttributeProvider obj, System.Type attributeType, Boolean

>> inherit) [0x00012]

>> in /root/mono-svn/mcs/class/corlib/System/MonoCustomAttrs.cs:120 

>> 

>>   at System.MonoCustomAttrs.GetCustomAttributes

>> (ICustomAttributeProvider obj, Boolean inherit) [0x0002a]

>> in /root/mono-svn/mcs/class/corlib/System/MonoCustomAttrs.cs:242 

>> 

>>   at System.Reflection.MonoProperty.GetCustomAttributes (Boolean

>> inherit) [0x00000]

>> in /root/mono-svn/mcs/class/corlib/System.Reflection/MonoProperty.cs:201 

>> 

>>   at System.ComponentModel.ReflectionPropertyDescriptor..ctor

>> (System.Reflection.PropertyInfo info) [0x00000]

>> in
/root/mono-svn/mcs/class/System/System.ComponentModel/ReflectionPropertyDesc
riptor.cs:57 

>> 

>>   at System.ComponentModel.TypeInfo.GetProperties () [0x00040]

>> in
/root/mono-svn/mcs/class/System/System.ComponentModel/TypeDescriptor.cs:1077


>> 

>>   at System.ComponentModel.TypeDescriptor.GetProperties (System.Object

>> component, Boolean noCustomTypeDesc) [0x0004f]

>> in
/root/mono-svn/mcs/class/System/System.ComponentModel/TypeDescriptor.cs:667 

>> 

>>   at System.ComponentModel.TypeDescriptor.GetProperties (System.Object

>> component) [0x00000]

>> in
/root/mono-svn/mcs/class/System/System.ComponentModel/TypeDescriptor.cs:623 

>> 

>>   at AjaxControlToolkit.ExtenderControlBase.CheckIfValid (Boolean

>> throwException) [0x00000] 

>> 

>>   at AjaxControlToolkit.ExtenderControlBase.EnsureValid () [0x00000] 

>> 

>>   at AjaxControlToolkit.DynamicPopulateExtenderControlBase.EnsureValid

>> () [0x00000] 

>> 

>>   at AjaxControlToolkit.ExtenderControlBase.GetScriptDescriptors

>> (System.Web.UI.Control targetControl) [0x00000] 

>> 

>>   at

>>
System.Web.UI.ExtenderControl.System.Web.UI.IExtenderControl.GetScriptDescri
ptors (System.Web.UI.Control targetControl) [0x00000] 

>> 

>>   at System.Web.UI.ScriptManager.RegisterScriptDescriptors

>> (IExtenderControl extenderControl) [0x00000] 

>> 

>>   at System.Web.UI.ExtenderControl.Render

>> (System.Web.UI.HtmlTextWriter writer) [0x00000] 

>> 

>>   at AjaxControlToolkit.ExtenderControlBase.Render

>> (System.Web.UI.HtmlTextWriter writer) [0x00000] 

>> 

>>   at System.Web.UI.Control.RenderControl (System.Web.UI.HtmlTextWriter

>> writer) [0x00048]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Control.cs:1256 

>> 

>>   at System.Web.UI.Control.RenderChildren

>> (System.Web.UI.HtmlTextWriter writer) [0x00073]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Control.cs:1116 

>> 

>>   at System.Web.UI.HtmlControls.HtmlForm.RenderChildren

>> (System.Web.UI.HtmlTextWriter w) [0x00034]

>> in
/root/mono-svn/mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlForm.cs:3
38 

>> 

>>   at System.Web.UI.HtmlControls.HtmlContainerControl.Render

>> (System.Web.UI.HtmlTextWriter writer) [0x00007]

>> in
/root/mono-svn/mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlContainer
Control.cs:124 

>> 

>>   at System.Web.UI.HtmlControls.HtmlForm.Render

>> (System.Web.UI.HtmlTextWriter w) [0x00000]

>> in
/root/mono-svn/mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlForm.cs:3
58 

>> 

>>   at System.Web.UI.Control.RenderControl (System.Web.UI.HtmlTextWriter

>> writer) [0x00048]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Control.cs:1256 

>> 

>>   at System.Web.UI.HtmlControls.HtmlForm.RenderControl

>> (System.Web.UI.HtmlTextWriter w) [0x00000]

>> in
/root/mono-svn/mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlForm.cs:3
47 

>> 

>>   at System.Web.UI.Control.RenderChildren

>> (System.Web.UI.HtmlTextWriter writer) [0x00073]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Control.cs:1116 

>> 

>>   at System.Web.UI.Control.Render (System.Web.UI.HtmlTextWriter

>> writer) [0x00000]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Control.cs:1092 

>> 

>>   at System.Web.UI.Page.Render (System.Web.UI.HtmlTextWriter writer)

>> [0x0015c]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Page.cs:1001 

>> 

>>   at System.Web.UI.Control.RenderControl (System.Web.UI.HtmlTextWriter

>> writer) [0x00048]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Control.cs:1256 

>> 

>>   at System.Web.UI.Page.InternalProcessRequest () [0x003ec]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Page.cs:1438 

>> 

>>   at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext

>> context) [0x00058]

>> in /root/mono-svn/mcs/class/System.Web/System.Web.UI/Page.cs:1202

>> 

>>  

>> 

>> Regards

>> 

>> Jens

 

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