December 2013 - dotnetblogpost.com

Custom Model Validation Provider for enabling ASP.NET MVC 3 client side validation.

Implementing Custom Model Validation Provider to enable client side MVC 3 validation The Validation framework of ASP.NET MVC 3 is designed for extensibility and customization. It supports validation model using attributes, or by implementing IValidatableObject or unobtrusive javascript based client side validation. It supports both property based or model based validation.But, again ASP.Net MVC 3 assumes… Read More »

Generic TryParse handler for generic .Net Lists

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<span style="font-family: Georgia, Times New Roman, serif;">Following C# code sample is a Generic TryParse handler for generic value type&nbsp;</span>

1	<span style="font-family: Georgia, Times New Roman, serif;">Following C# code sample is a Generic TryParse handler for generic value type </span>

<span style="font-family: Georgia, Times New Roman, serif;">lists in .Net.  Any character delimited list can be split and use safe TryParse against split list&nbsp;</span>

1	<span style="font-family: Georgia, Times New Roman, serif;">lists in .Net. Any character delimited list can be split and use safe TryParse against split list </span>

<span style="font-family: Georgia, Times New Roman, serif;">to ensure you have valid data.</span>

1	<span style="font-family: Georgia, Times New Roman, serif;">to ensure you have valid data.</span>

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<span style="color: blue;">using</span> System;<br /><span style="color: blue;">using</span> System.Collections.Generic;<br /><span style="color: blue;">using</span> System.Linq;<br /><span style="color: blue;">using</span> System.Text;<br /><span style="color: blue;">using</span> System.Threading.Tasks;<br /><br /><span style="color: blue;">namespace</span> GenericTryParsehandler<br />{<br />    <span style="color: green;">/// &lt;summary&gt;</span><br />    <span style="color: green;">/// Generic TryParsehandler to split and parse generic value type lists.</span><br />    <span style="color: green;">/// &lt;/summary&gt;</span><br />    <span style="color: green;">/// &lt;typeparam name="T"&gt;&lt;/typeparam&gt;</span><br />    <span style="color: green;">/// &lt;param name="value"&gt;&lt;/param&gt;</span><br />    <span style="color: green;">/// &lt;param name="result"&gt;&lt;/param&gt;</span><br />    <span style="color: green;">/// &lt;returns&gt;&lt;/returns&gt;</span><br />    <span style="color: blue;">public</span> <span style="color: blue;">delegate</span> <span style="color: blue;">bool</span> TryParseHandler&lt;T&gt;(<span style="color: blue;">string</span> value, <span style="color: blue;">out</span> T result);<br />    <span style="color: blue;">class</span> Program<br />    {<br />        <span style="color: blue;">static</span> <span style="color: blue;">void</span> Main(<span style="color: blue;">string</span>[] args)<br />        {<br />            <span style="color: blue;">var</span> semiColonDelimitedDateInput = <span style="color: #a31515;">"01/01/2001;2/02/2012;05/31/2013;05/05/1992"</span>;<br />            <span style="color: blue;">var</span> commaDelimitedIntInput = <span style="color: #a31515;">"3,4,5,6"</span>;<br />            <span style="color: blue;">var</span> intresult = commaDelimitedIntInput.TryParseList&lt;<span style="color: blue;">int</span>&gt;(<span style="color: blue;">new</span>[] { <span style="color: #a31515;">','</span> }, <span style="color: blue;">int</span>.TryParse);<br />            <span style="color: blue;">var</span> dateresult = semiColonDelimitedDateInput.TryParseList&lt;DateTime&gt;(<span style="color: blue;">new</span>[] { <span style="color: #a31515;">';'</span> }, DateTime.TryParse);<br />            <br />            <span style="color: blue;">if</span> (dateresult.Count &gt; 0)<br />            {<br />                <span style="color: blue;">foreach</span> (<span style="color: blue;">var</span> element <span style="color: blue;">in</span> dateresult)<br />                {<br />                    Console.WriteLine(element);<br />                }<br />            }<br />            <span style="color: blue;">else</span><br />            {<br />                Console.WriteLine(<span style="color: #a31515;">"Your semiColonDelimitedDateInput cannot be parsed."</span>);<br />            }<br />            Console.WriteLine(<span style="color: #a31515;">"*******************************************************************"</span>);<br />            <span style="color: blue;">if</span> (intresult.Count &gt; 0)<br />            {<br />                <span style="color: blue;">foreach</span> (<span style="color: blue;">var</span> element <span style="color: blue;">in</span> intresult)<br />                {<br />                    Console.WriteLine(element);<br />                }<br />            }<br />            <span style="color: blue;">else</span><br />            {<br />                Console.WriteLine(<span style="color: #a31515;">"Your commaDelimitedIntInput cannot be parsed."</span>);<br />            }<br />            Console.ReadLine();<br />        }<br />    }<br /><br /><br />    <span style="color: green;">/// &lt;summary&gt;</span><br />    <span style="color: green;">/// </span><br />    <span style="color: green;">/// &lt;/summary&gt;</span><br /><br />    <span style="color: blue;">public</span> <span style="color: blue;">static</span> <span style="color: blue;">class</span> ExtensionMethods<br />{<br />        <span style="color: green;">/// &lt;summary&gt;</span><br />        <span style="color: green;">/// Generic handler to split and TryParse each item in the list. Handler supports value types.. </span><br />        <span style="color: green;">/// &lt;/summary&gt;</span><br />        <span style="color: green;">/// &lt;typeparam name="T"&gt;&lt;/typeparam&gt;</span><br />        <span style="color: green;">/// &lt;param name="source"&gt;&lt;/param&gt;</span><br />        <span style="color: green;">/// &lt;param name="separator"&gt;&lt;/param&gt;</span><br />        <span style="color: green;">/// &lt;param name="handler"&gt;&lt;/param&gt;</span><br />        <span style="color: green;">/// &lt;returns&gt;&lt;/returns&gt;</span><br />    <span style="color: blue;">public</span> <span style="color: blue;">static</span> List&lt;T&gt; TryParseList&lt;T&gt;(<span style="color: blue;">this</span> <span style="color: blue;">string</span> source, <span style="color: blue;">char</span>[] separator, TryParseHandler&lt;T&gt; handler)<br />        where T : <span style="color: blue;">struct</span><br /><br />    {<br />        <span style="color: blue;">var</span> splitList = <span style="color: blue;">new</span> List&lt;T&gt;();<br />        <span style="color: blue;">if</span> (<span style="color: blue;">string</span>.IsNullOrEmpty(source)) <span style="color: blue;">return</span> splitList;<br /><br />        <span style="color: blue;">var</span> parsedString = source.Split(separator, StringSplitOptions.RemoveEmptyEntries).ToList();<br /><br />        parsedString.ForEach(x =&gt;<br />        {<br />            T result;<br />            <span style="color: blue;">if</span> (handler(x, <span style="color: blue;">out</span> result))<br />            {<br />                splitList.Add(result);<br />            }<br />        });<br /><br />        <span style="color: blue;">return</span> splitList.Count == parsedString.Count ? splitList : <span style="color: blue;">new</span> List&lt;T&gt;();<br />    }<br />}<br />}<br />

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace GenericTryParsehandler { /// <summary> /// Generic TryParsehandler to split and parse generic value type lists. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="value"></param> /// <param name="result"></param> /// <returns></returns> public delegate bool TryParseHandler<T>(string value, out T result); class Program { static void Main(string[] args) { var semiColonDelimitedDateInput = "01/01/2001;2/02/2012;05/31/2013;05/05/1992"; var commaDelimitedIntInput = "3,4,5,6"; var intresult = commaDelimitedIntInput.TryParseList<int>(new[] { ',' }, int.TryParse); var dateresult = semiColonDelimitedDateInput.TryParseList<DateTime>(new[] { ';' }, DateTime.TryParse); if (dateresult.Count > 0) { foreach (var element in dateresult) { Console.WriteLine(element); } } else { Console.WriteLine("Your semiColonDelimitedDateInput cannot be parsed."); } Console.WriteLine("*******************************************************************"); if (intresult.Count > 0) { foreach (var element in intresult) { Console.WriteLine(element); } } else { Console.WriteLine("Your commaDelimitedIntInput cannot be parsed."); } Console.ReadLine(); } } /// <summary> /// /// </summary> public static class ExtensionMethods { /// <summary> /// Generic handler to split and TryParse each item in the list. Handler supports value types.. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="source"></param> /// <param name="separator"></param> /// <param name="handler"></param> /// <returns></returns> public static List<T> TryParseList<T>(this string source, char[] separator, TryParseHandler<T> handler) where T : struct { var splitList = new List<T>(); if (string.IsNullOrEmpty(source)) return splitList; var parsedString = source.Split(separator, StringSplitOptions.RemoveEmptyEntries).ToList(); parsedString.ForEach(x => { T result; if (handler(x, out result)) { splitList.Add(result); } }); return splitList.Count == parsedString.Count ? splitList : new List<T>(); } } }

10 Practical ASP.Net MVC 4 Interview Questions

10 Practical ASP.Net MVC 4 Interview Questions: 1) Do you think following is valid route definition for ASP.NET MVC solution? Answer: YES. Variable length routes are valid. This route will match any URL, irrespective of number of placeholders it contains. _________________________________________________________________________________ 2) Is the following route definition a valid one? If so please explain? Answer:… Read More »

Automated asp.net web application testing using Selenium

ASP.Net Web Application Integration testing using Selenium 2.0 Selenium primarily used for automating web applications for testing purposes. You can create browser based regression tests using Selenium WebDriver. Selenium WebDriver provides a concise programming interface. It drives the browser much more effectively. Selenium WebDriver makes direct calls to browser using each browser’s native support for… Read More »