My blog has been visited more than 110 Countries

     Thanks to those you already visited my blog, and gave me suggestion,.Recently I have seen my blog statistics it saying that “This blog visited more than 110 countries”.
      I feel very happy.It encourage me to post more articles.This year I am trying to contribute more.
 Once again thanks for your comments and suggestions those helps to me a lot.

Cascading dropdown Implementation using jQuery

Cascading dropdown functionality is common requirement in every web application. Implementing cascading dropdown in JavaScript is very lengthy and takes lot of effort to use AJAX calls .

With jQuery you can write in simple way to achieve this. Here is the code for populate  the state dropdown based on the country dropdown selected value.

 <script language="javascript" type="text/javascript">

        $(document).ready(function () {

            $(document).ready(function () {

                $("#ddlCountry").change(function () {

                    var selectedItem = "";

                    selectedItem = $(this)[0].value; // get the selected ddlCountry id

                    var url = '/Home/AsyncGetStateList/?countryId=' + selectedItem;

                    $.get(url, function (data) {       // call controller's action

                        $("#ddrStates").empty();

                        $.each(data, function (index, optionData) {

                            $("#ddrStates").append("<option value='"

                            + optionData.Text

                            + "'>" + optionData.Value

                            + "</option>");

                        });

                    });

                });

            });

        });

    </script>

New optimized code

The above code has totally 21 lines. This we can optimize to 12 lines. Here is the code.

 

 <script language="javascript" type="text/javascript">

        $(document).ready(function () {

            $("#ddlCountry").change(function () {

                $.getJSON("/Home/AsyncGetStateList", { countryId: $("#ddlCountry option:selected").val() }, function (data) {

                    $("#ddrStates").empty();

                    $.each(data, function (index, optionData) {

                        $("#ddrStates").append("<option value='"

                                           + optionData.Text

                                          + "'>" + optionData.Value

                                           + "</option>");

                    });

                });

            });

        });

    </script>

Check box click example using jQuery

 

<script language="javascript" type="text/javascript">

      $(document).ready(function () {

          $('#EFFND').click(function () {

              $("#EFFNDP").toggleClass("hidden");

          });

      });

</script>

Action method calling twice in ASP.NET MVC

         This happens due to many reasons.In one my project i have faced this  was an image with an
empty “src”  property and that would call controller once again.

        This is not the issue with  ASP.NET MVC .It is browser behavior .If the response form(Web form )
having any broken div tags  (Unclosed div tags) or Image source is empty then browser thinking that
form not loaded properly and resubmit the form .It causes to call action method twice in ASP.NET MVC

    Precautions to  prevent the issue

• Maintain all image tags having  “src” or Image URL (if control is ASP.NET ) with valid image url
  
• Add alternative description for every image control (ex:  alt=”Home Banner”)
  
• Check all div tags closed properly in Web page
  
• Validate your each web page once the development is  completed http://validator.w3.org/

Once you specify your webpage “url”  in the Validator.w3.org site and click on check button .it shows the list of issues and description of respective error

Ex: One of the sample web page I have validated using http://validator.w3.org/ . The result you can find below  snap shot

Solution for Prevent closing IE browser when stop debugging in Visual Studio

When  your run the  application with IE browser you will face one issue that is after stop the debugging  Visual Studio automatically  closes your IE browser

 

Here is the solution to prevent the closing IE browser

 

->Click on start debug button in toolbar

->Once the application is running in IE browser

->Click on Detach All as I  showing below  when ever you  don’t want to debug

->Now your browser will not close .

 

The maximum message size quota for incoming messages , has been exceeded. To increase the quota,..WCF exception

 

                                        Recently i got this exception when i work with WCF service. One of the Web Method returns heavy data.It is not an issue. The problem hear is  maxReceivedMessageSize is exceeded .         
The Default value of maxReceivedMessageSize is "65536". We can change this value upto "2147483647".I have increased the size of maxBufferSize,maxReceivedMessageSize  in Web.config file (Binding section).

The problem got resolved .

 

 

Note: Don’t copy all the code .Only change the maxBufferSize,maxReceivedMessageSize  as I specified in below .

<binding name="BasicHttpBinding_Service1" closeTimeout="00:01:00"

                    openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"

                    allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"

                    maxBufferSize="2147483647" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647"

                    messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"

                    useDefaultWebProxy="true">

                    <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"

                        maxBytesPerRead="4096" maxNameTableCharCount="16384" />

                    <security mode="None">

                        <transport clientCredentialType="None" proxyCredentialType="None"

                            realm="" />

                        <message clientCredentialType="UserName" algorithmSuite="Default" />

                    </security>

                </binding>

Happy coding ..

ASP.NET MVC - An item with the same key has already been added

ASP.NET MVC having power full mechanism of model binding.Whatever data HTTP request carries from the client  side to server  ASP.NET MVC engine

takes the all keys and binds  the values to relevant properties .If the Model contains more than one key with same name ASP.NET throws this

exceptions .

Solution :

1.Identify the duplicated  properties in the model (May be your model inherited some base model which is having same key )
   and rename with unique name

 
2.Same name with different data types also you will face the exceptions.So change the data type If you have more than
    one property in model or base classes.