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Saturday, December 20, 2014

ASP.Net MVC – Create Custom HTML Helpers

By Francis   Posted at   11:52 AM   Razor No comments
Html Helpers are classes that helps to render HTML controls in Views. We can also create our own HTML Helpers. In this post, I’m going to explain how to create a simple Custom HTML Helper. The main purpose creating custom HTML helper is reuseability.

Step 1:
          Create a static class and add method to it like below.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace MVCTutorial
{
    public static class CustomHTMLHelper
    {
        public static MvcHtmlString ImageLink(string action, string controller, string imgageURL)
        {
            // Create a link with an image
            return MvcHtmlString.Create(String.Format("<a href=\"{1}\\{0}\"> <img src=\"{2}\" /></a>", action, controller, imgageURL));
        }
    }
}

     
Step 2:
          Access the custom helper class in a View.
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Sample</title>
</head>
<body>
    <div>
        @CustomHTMLHelper.ImageLink("Home","Account","your image url")
    </div>
</body>
</html>

The helper class is static, since it can be called in a easy manner also handy.
Happy coding!

Tuesday, December 9, 2014

Design Pattern - An Introduction

By Francis   Posted at   5:08 PM   Design Pattern No comments

                                  Few weeks ago, I commit to take an session about design pattern in my organization. As a matter of fact, I’m not a big fan of design pattern. However, I began dwell with design pattern, I found interesting on it. So I decided to write some posts on it. In this post, I just give an introduction about design pattern.
So what is design pattern?

                                 Design Pattern are conceived by the 4 people who wrote the book "Design Patterns: Elements of Reusable Object-Oriented Software ".  Design pattern is a proven ways to solve the particular problem while arising often writing software programs. Those problems are frequently encountered by the programmers, most probably when design the software.  So there is no reinvent the well again. There are 23 solutions predefined by the above authors. Each problem has its own name also.
The ultimate goal:
There is no reinvent of solution for the 23 problems. Also the main benefit is maintainability of software. If you want to change something in the existing system it is so easy. The above are the main benefits of design pattern. These 23 design patterns are called Gang Of Four in general.
                           They are categorized into 3 types. They are: 1. Structural Pattern 2. Creational Pattern 3. Behavioral Patterns

The category name itself enough to explain, the purpose of each pattern. For example, Creational patterns are talk about the object creation. At the same time structural pattern described about code structure. Below are the 23 design patterns.

 

Creational Patterns:

  1. Abstract Factory
  2. Singleton Pattern
  3. Builder Pattern
  4. Factory Method Pattern
  5. Prototype Pattern

 

Structural Patterns:

  1. Flyweight Pattern
  2. Proxy Pattern
  3. Adapter Pattern
  4. Bridge Pattern
  5. Facade Pattern
  6. Composite Pattern
  7. Decorator Pattern
  • Behavioral Patterns:
    1. Chain of Responsibility
    2. Observer Pattern
    3. Command Pattern
    4. Interpreter Pattern
    5. Iterator Pattern
    6. Visitor Pattern
    7. Template Pattern
    8. Strategy Pattern
    9. Memento Pattern
    10. Mediator Pattern
    11. State Pattern

Sunday, October 5, 2014

ASP.Net Forums–FAQ #6: ASP.Net Session Expired Problem

By Francis   Posted at   12:29 AM   IIS Tips and Tricks 1 comment
session_expired
Most of the asp.net application using session, especially data driven applications. Mostly these kind of application using “Inproc” mode of session. During development the developer does not face any kind of problem with the session. When deploy the application the problem arise one by one. In this post I just want to share some thoughts and my professional experience on this issue.

Saturday, September 27, 2014

How to disable the “tooltip” for a Asp.net control programmatically?

By Francis   Posted at   12:31 AM   ASP.Net with Javascript No comments
One of the forum member ask this question in the asp.net forum. The answer is yes, we can use a simple javascript to achieve this functionality. Take a look at the below code:
Using Javascript:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
        function DisableToolTip() {
            // Get the object
            var obj = document.getElementById('LnkBtn');
            // set the tool tip as empty
            obj.title = "";
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:LinkButton runat="server" Text="Simple Link Button" ToolTip="Simple Button with Tool Tip" ID="LnkBtn" ClientIDMode="Static" ></asp:LinkButton>
    <a href="#" id="lnkDisable" onclick="DisableToolTip();">Disable Tool Tip</a>
    </form>
</body>
</html>

Using JQuery: 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#lnkDisable").click(function () { $('#LnkBtn').attr({'title':''}); });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:LinkButton runat="server" Text="Simple Link Button" ToolTip="Simple Button with Tool Tip" ID="LnkBtn" ClientIDMode="Static" ></asp:LinkButton>
    <a href="#" id="lnkDisable">Disable Tool Tip</a>
    </form>
</body>
</html>

Monday, September 15, 2014

ASP.Net Forums - FAQ #5: How to change the Title Case of a string to Uppercase in Server Side?

By Francis   Posted at   12:04 PM   ASP.Net Forums No comments
One of the user in the forum asked similar to this question. In server side, I thought take the string, and covert it to character array and loop thru the character and change the first Letter alone to capital letter.
                     Instead,we can use “TextInfo” class to achieve the solution in a easier manner. The below function used to convert the given string’s first character alone as a Capital letter.

       
        using System.Globalization;
        using System.Threading;
        public string changeName(string inputname)
        {
            string modifiedname = string.Empty;
            string[] names = inputname.Split(' ');
            foreach (string name in names)
            {
                    CultureInfo cultureInfo   = Thread.CurrentThread.CurrentCulture;
                    TextInfo txtinfo = cultureInfo.TextInfo;
                    string temp=txtinfo.ToTitleCase(name);
                    modifiedname = string.Concat(temp, " ");
            }
            return modifiedname;
        }
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