HTTP Error 500.19 - Internal Server Error, 0x80070021 while browsing your web app

Hello :) This is a quick draft as i faed this issue many times and every time i wondered what is the actual solution to it, is it something needs to be changed on web.config? or needs to be changed something in upper level config files as i was getting the same answer from everywhere

But the thing is why it works in other fresh machine with same configuration and why not on this? possible solution are below (apart from changing on config file level or unlocking config elements)

• If you are using WCF make sure you have turned on the feature called "http activation" is turned on - It worked for me
• If you are using windows authentication, make sure it is installed and turned on
• run "c:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i"

I know there are many reason which can cause this but i just drafted which worked for me as i was working with windows auth and WCF so may be if you have the same kind of scenario, it might help without locking/unlocking things from web.config

Could not resolve mscorlib for target framework '.NETFramework,Version=v4.0'. This can happen if the target framework is not installed or if the framework moniker is incorrectly formatted wcf update service reference issue

I am feeling little good about writing this blog as this might help many, as i searched for the suggestion on the net for couple of days but may be i didn't google it properly (I can not say google does not have solution :) ), but finally if ends well everything is well, i got the solution of this nightmare kinda issues

The Issue

I faced this issue and i saw on the net the plenty like me had the same issue, that one fine morning your service reference stopped updating, or you can't do anything with them, which were working fine earlier, You can't update service reference, you can't delete them, once you remove everything and give the reference again, the error fires back again and you can't repeat the same procedure of deleting and inserting the reference over and over

See the following screen shot

Above is the screen shot which i kept on getting and searched for the solution with best of my googling capabilities untill i got the solution which is below, Before that there were many solutions like the classe names which WCF (wsdl) generates were larger than 256 characters, But i could not use that solution for some reason, other solutions were re intalling some of the MS tools and re installing them, Below is the solution which worked for me and i am posting so other can also make use of it

Solution

Creating a batch file instead of manually adding service reference (WCF reference) will only generate the wsdl files which is required to access the data of it and functions inside it and via which the above error will be gone

@ECHO OFF

set UIProjectServiceRefPath =..\..\MyApplication\ServiceReferences

set SVCUTILPATHValue =C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin\NETFX 4.0 Tools

ECHO Generating CommonService.CS
"%SVCUTILPATHValue %\svcutil.exe" /o:"%UIProjectServiceRefPath %\CommonService.cs" /reference:"c:\MyDomainService\bin\Debug\Domain.dll" /serializer:Auto /edb /ct:System.Collections.Generic.List`1 /ixt  /namespace:*,MyService.CommonService http://localhost/MyService.BLL/CommonService.svc?wsdl

set /p delBuild=press any key to exit:

• Create a .bat file (batch file) like above, very first line after echo is where you want to have those class files to be created, this would be same path where your WCF service reference were getting created, so replace your path having that in mind
• Second Echo statement is your actual service file which you want to generate, now if you have 3 services, you will these type 3 echo statements with their respective paths, here /reference is any reference DLLs your WCF might be using, so give those DLLs path there, you can have multiple /reference nodes followed by one another
• /namespace is via which you will be referencing your classes to create their objects, and .svc is your hosted WCF service, the path which you were using to add service reference.

Now remove your existing "Service reference" folder which you have generated from previous WCF manual add service reference from windows explorere and also from your solution, and doucle click this file, it will generate "ServiceReference" folder at the smae place and inside that it will put above .CS files which is in .dat file

Your are good to go, go to your solution include this folder and build your project, if you have configured it properly it will build with no error, and now whenever you want to update the service reference, just double click this file to generate new WSDLs

Feel free to comment here in case of any doubt, I would like to mention here the valuable help from http://k-sharp-net.blogspot.in/ (Kamlesh samnani, very good colleague of mine)

401.1 Unauthorized with windows authentication error code 0xc000006d

How many of you have faced this hosting issue when you do everything what it takes to run the site with windows authentication but still you are getting the same error again and again?

If you think you also have faced the same issue and you tired of reading MSDN KBs for it and still have not found the issue (If KB has solved the issue, well and good, if not you can try this trick),Please Read below

Typical scenario


In typical hosting with IIS, i did every possible things like enabling windows authentication, changing it in web.config, configuring connection pool, authorization rules, it asks me for window authentication login and despite of entering correct credentials it always fails and keeps on asking for login, and when pressed cancel it gives 401.1 with 0xc000006d error code

Solution (Which worked for me at-least after trying for almost 6-9 hrs)

You need to change the Loop Back Check in registry so that it allows the host names which you are giving in url are allowed and authorized, Following are the steps

• The solution is some registry hacking to avoid loopback check:
• Using regedit, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0
• Add a new Multi-String Value to MSV1_0 and name it BackConnectionHostNames
• Add the host names you wish to use. In my case, "test.mytestsite.com".
• Restart the IIS.

I got this important information from http://falunbyday.blogspot.in/2013/02/windows-authentication-fails-on-local.html,It was life saver

Thanks, Enjoy

File upload reference on client side for client side processing like crop image or anything

I have had a requirement were i needed to include the crop functionality in already developed file upload control, requirement was user should be able to crop the images he selects and later on when he finalize the selection, and that file should get saved on server so next it is available to user
Here our tradition approach is always like, we upload the file on server on some temporary location, so that it is available for cropping to user, and he can apply cropping on client side and send that to server with its crop selection and on server side we can process that image and crop on server side with already uploaded image and save so only cropped version will be saved and use that image
There is another approach which can save us from doing the upload first, crop and later on again save that image, the process is like following, Find the following code



Consider following is my upload control

Now,Consider following javascript registered which will take the file reference on client side and return the byte array of image and directly show in preview on the fly and very fast, as it is yet not uploaded on server, so process is very fast

function getImageFromClientSide(file) {

    var reader = new FileReader();
    var image  = new Image();
  
    reader.readAsDataURL(file);  
    reader.onload = function(_file) {
    image.src    = _file.target.result;              
    image.onload = function() {
           var w = this.width,
           h = this.height,
           t = file.type,                           
           n = file.name,
           s = ~~(file.size/1024) +'KB';
           $('#uploadedImagePreview').attr('src',this.src);
        };
    };
    
}
$("#imgSelector").change(function (e) {
    getImageFromClientSide(this);

});

As you can above, what it is using is FileReader method of DOM and reading a file from client's computer, and it will convert image into byte array of base 64, now you can treat this as a string and you can send this image to server side using ajax or anything as a string, and on server side (i am using asp.net c#, and you can use following

byte[] imageBytes = Convert.FromBase64String(imageByteArray); // Here imageByteArray is my string variable which contains the byte array string sent from client side 
   TypeConverter tc = TypeDescriptor.GetConverter(typeof(Image));
   Image OriginalImage = (Image)tc.ConvertFrom(imageBytes))

As this whole process is working on client side, this is very fast in performance, I got the reference of my search and r&d from http://jsbin.com/oTAtIpA/490/edit url and i implimented it from the same, i hope this will help some of you coders
Thanks you !!!

Same old file reference in project when 'Add reference' issue

Here is the "STUPID" scenario i came across,Following is the problem i had

Issue
I had one folder in my computer and it had two different version of dlls,My project already had reference of one of the dll,But now i wanted the reference of other dll,I simply deleted the old reference and tried to add new reference of the other file by selecting it,It was added but was showing old version when i tried to see its property ,I tried multiple times with multiple ways but no luck

Solution

First just check out the folder structure i had in my project,Here "Dlls" is the folder from which i wanted to add another file


You can see the "Dlls" folder is included in the project, And thanks to "Mr. Zakir Rana", One of project partner who insisted me to try excluding this folder and adding reference, It sounded foolish to me as its physical folder after all no matter if it is included or not,But i was surprised as soon as i excluded the folder,And it started taking new reference !!!

Ajax call inside for loop issue and solution

Hello people, This post is regarding real day to day issue in coding and its resolution, It sometimes looks small issue but when it starts eating your time you start getting feeling that its no more smaller one, Here goes the issue

As the title of the blog suggests, When you are making AJAX calls inside loop, It is finitely possible that inside loop when the call is made, It takes time to get the result back to client side and by that time loop has already ended and counter has reached to limit and you end up thinking how to keep track of the request, it should get the correct index in "Success" method of $.ajax call, Otherwise it will keep on giving you one count higher than your total count of loop, There can be many way as we know in our world but below is one of the good solution to it

Solutions
See below code for an example

for (var i = 0; i < groupCount.length; i++) 
{
                !function (i) {
                    $.ajax({
                        type: 'POST',
                        url: ,
                        data: data,
                        dataType: "json",
                        success: function (respons) {
                            // Do some action
                            
                        },
                        error: function (err, para1, parra2) {
                           // Do some action 
                        }
                    });
                } (i);

Here we can see we have wrapped the ajax call into !function(), It will make sure that your ajax call works, no matter what !!!, One more dirty fix is that we can change the property called async=false in $.ajax parameters but that does not serve the purpose as when we use ajax it has to be async.

Small but helpful !!!

Facebook Graph API calls for facebook integration

FACEBOOK the world of it's own,But it sounds good if you get its power in your site,Photos,Status,Like,Commenting,Facebook albums, In short you can simply go and create your app which does everything for you without even going on to facebook

Facebook has its very superb API which you can find on developer.facebook.com, You can download full binaries to be coded in C# but i will skip that and put that on readers to explore as and when you have time,Lets talk something short and sweet

Facebook Page
Here i am only going to talk about the get API calls,That means only things which only get the data from any public page,Say you have a page on facebook for your business and you want the data from your facebook page to be shown onto your website,You can use these calls,Fast,Easy and Fun,Lets get started

Say i have a photography page on my facebook or any other page,You can get its photo albums and its photos by following code,Some of the things required to make a call are following

• Unique Id or name of the facebook page
• Facebook Graph API url on which you will make a http request and wait for the response
• Each call are different (i.e photos,albums etc,Depending on your requirement) so proper URL of those calles

The Calls
Lets say i want to get the basic details of my FB page,like it's description,cover photo,profile pic,so following is the url you would be using

NOTE: Here i am using my photography page to show,You can replace the page name with yours

Get the FACEBOOK page basic info

https://graph.facebook.com/147326062077207

Try hitting above url into browser and you will get an idea what you would be doing,As it returns well formed JSON string and you will make use of that JSON and display the things
Get the list of photo albums on your page

https://graph.facebook.com/147326062077207/albums

Get list of photos into specific album

From above url you will get list of albums with their album id,and in below url you will pass that album id to get photos inside it

https://graph.facebook.com/153930304750116/photos

Getting album cover photo to show

From above url you will get list of photos for particular album,and if you see its JSON string,The 'picture' property is thumbnail preview of the cover photo, So you can take that 'picture' property and show that image from FACEBOOK's CDN.

There are many other useful properties and functions with GET and POST request,I will be covering them in next blog post, Enjoy playing with it,And do provide feedback !!!

Importance of flushing memory

As we know in our day to day life how important 'Flush' is :),But that teaches us same thing in our programming life as well

Let me share a scenario where i faced the issue,In our day to day life of deadlines,Sometimes we forget to write the code which is actually needed there,You achieved the best with your code but you do not achieve the better sometimes

The Scenario :

I before few days created export to CSV and export functionality of my one of the list (Grid),It was importing the data very well,But on the close examination of data i found out that its inconsistent data,At some point of time it stopped writing the data and from that point onward there were no data in exported file.

Following is the code.

HSSFRow row = wsheet.GetRow(i);
for (short j = 0; j < row.LastCellNum; j++)
{

     HSSFCell cell = row.GetCell(j);
     string strValue = string.Format("\"{0}\",",   Convert.ToString(cell.RichStringCellValue.String));
       StreamWriter.Write(strValue);
       
 

}
StreamWriter.WriteLine();
StreamWriter.Flush();

If you see above code you do not find any issue,Same happened with me,I tried debugging it over and over,logging the operation but surprising thing was in log each and everything was coming,And i end up finding the issue was below

Issue The mistake i did was i was not clearing our StreamWriter from memory by flushing the memory and hence it was creating issue,One single statement introduced and woooo...issue got resolved like below

HSSFRow row = wsheet.GetRow(i);
for (short j = 0; j < row.LastCellNum; j++)
{

     HSSFCell cell = row.GetCell(j);
     string strValue = string.Format("\"{0}\",",   Convert.ToString(cell.RichStringCellValue.String));
       StreamWriter.Write(strValue);
       StreamWriter.Flush();
 

}
StreamWriter.WriteLine();
StreamWriter.Flush();

Everything started working as it should be,Simple but very important to follow the theories.

An error occurred while receiving the HTTP response to This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details.

You have noticed many times that everything was working fine and suddenly the below error starts coming and you find no way to work it out An error occurred while receiving the HTTP response to This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details.

The reason for this is the receiving size of WCF service is smaller then the data which is coming from service It was working before because it was small,So you will have to try to increase the receiving setting in your end point,Possible settings can be following

maxStringContentLength="2147483647"
maxReceivedMessageSize="2147483647"
maxBufferSize="2147483647"
maxArrayLength="2147483647"

That would definately help you!!!

Microsoft.VisualStudio.QualityTools.HostAdapters.ASPNETAdapter, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a runtime error

Or any file which fires this error,it may be any dll you are using in project

Today fine morning,i opened my old project which is live and needed to change something and upload,but as soon as i tried to run,It fired above error,and i was wondering everything was working fine and what has happened now? But i think our human body sometimes stops working without warning and this is just a code so there may be something wrong with it and i tried figuring it out and below is the story and conclusion

I got one of the targeted solution on below link http://live.mscommunity.net/blogs/damirdobric/archive/2011/03/18/cannot-start-wcf-web-service-because-of-aspnetadapter-failure.aspx

It basically deals with 32bit and 64 bit versions and i end up putting following lines in web.config file

<runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
     <dependentAssembly>
        <assemblyIdentity name="Microsoft.VisualStudio.QualityTools.Resource" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <codeBase version="10.0.0.0" href="file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualStudio.QualityTools.Resource/10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.QualityTools.Resource.dll" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.VisualStudio.QualityTools.HostAdapters.ASPNETAdapter" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <codeBase version="10.0.0.0" href="file:///C:/Program%20Files/Microsoft%20Visual%20Studio%2010.0/Common7/IDE/PrivateAssemblies/Microsoft.VisualStudio.QualityTools.HostAdapters.ASPNETAdapter.DLL" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.VisualStudio.QualityTools.Common" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <codeBase version="10.0.0.0" href="file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualStudio.QualityTools.Common/10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.QualityTools.Common.dll" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.VisualStudio.QualityTools.ExecutionCommon" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <codeBase version="10.0.0.0" href="file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualStudio.QualityTools.ExecutionCommon/10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualStudio.QualityTools.ExecutionCommon.dll" />
      </dependentAssembly>
  </assemblyBinding>
</runtime>

Ssy you have UI project,Web services,content delivery etc projects,If you are using hosting in IIS and your project is directly referencing that virtual directory,That means you will end up inserting above lines in all the projects web.config file

Just restart the IIS and try to run your project,It will work now !!!

DateTime format and decimal or currency issue resoved using Custom model binders in MVC

Hi all,

You can't keep yourself away from writing blog when you have faced an issue while development and you tried to solve it and finally you come across something interesting which finally resolved the issue

Today's post is regarding the scenario which we face in day to day life (But i faced it for the first time today) where i had multilingual application running on telerik controls

One of the page had DateTimePicker,We have "da-DK" (Danish) clients,When tried to save Date from one page,The page kept on giving error message "DateTime format is not valid" for this field (Typical MVC datetime validation error messgae)

So scenario was in UI everything was coming as per culture,If i select date from DatePicker it was returning correct format,But still couldn't figure out what was wrong

So let me cut the story short and tell you,Model binder was the key to success

The code looks like following

public class DateTimeModelBinder : IModelBinder
{
  public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
  {
            ValueProviderResult valueResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
            ModelState modelState = new ModelState { Value = valueResult };
            object actualValue = null;
            try
            {
                string culture = Convert.ToString(HttpContext.Current.Session["culture"]);
                Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(culture);
                Thread.CurrentThread.CurrentUICulture = new CultureInfo(culture);
                actualValue = Convert.ToDateTime(valueResult.AttemptedValue, Thread.CurrentThread.CurrentCulture);
            }
            catch (FormatException e)
            {
                modelState.Errors.Add(e);
            }

            bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
            return actualValue;
  }
}

Above is simple class created under folder "Helper",Now what it does is it tells compiler that which format the date should be parsed so that its valid on server

Now,We are not done yet,We need to register this binders in global.asax file on Application_Start so that at runtime this class gets called and later on can parse the date as per culture,Which is like below

protected void Application_Start()
{
     AreaRegistration.RegisterAllAreas();
     RegisterGlobalFilters(GlobalFilters.Filters);
     RegisterRoutes(RouteTable.Routes);
           
      ModelBinders.Binders.Add(typeof(DateTime), new DateTimeModelBinder());
     WebAssetDefaultSettings.UseTelerikContentDeliveryNetwork = true;
}

Now,Try to submit the date which previously you were trying to in different culture and all will work,Same applies for currency,You can use Convert.Deciaml() instead of Convert.DateTime

Cheers!!!

telerik multiple window bug

Many of you (just like me) might have came across the multiple telerik window bug which is just as annoying as it can get

Scenario : In my case i had two telerik window which were opening from the same grid,one was inbuilt window for editing the record (GridEditMode.PopUp) and the other one was opening from one hyperlink inside the same grid

Here i had used the same model for both the partial controls which were loading inside window,so the control's generated html contained id same as property name of strongly model

So now when i was opening first window it came loaded with all controls and my partial control,now i opened second window as well,everything worked fine till now.

Now if you people might have observed that when you close the telerik window,It does not clear the content which you rendered inside it,so window was closed but the html inside remained as it is.

Now problem occurs now if i try to open the default edit pop up window for telerik grid it tries to render the html and now we have used the same model here so it gets same "Id" for the controls inside (as out previous window which we closed already has same content in it),and hence it does not know what to do and fires an error

So we always wonder,It was working when i first opened it but now when i opened it for the second time,It does not work and we run out of ideas what to do

Below is the solution for the same,It might help you solve the issue for your telerik multiple window

Solution : Just clear the content of the window in OnClose event like following,Write a client side event for window which calls below function

function OnClose()
{
   // MyWindow is id of my window
   $('#MyWindow').html('');
}

This is simple but it avoids many issues and saves time

Cheers !!!