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Friday, October 5, 2018

Learn Angular Step By Step- Week One

Learn angular Step By Step:
In this article, I am sharing some links, It will help you out to quick learn of angular.
Before starting it go to angular official site and read basic of angular. If you have basic idea about angular then you can start from given below links:
https://angular.io/guide/quickstart

After reading basic of angular official site , Let’s start topic one by one:

Point 1 : https://www.tektutorialshub.com/bootstrapping-angular-2-application/

Point 2 : https://www.c-sharpcorner.com/article/learn-about-angular-lifecycle-hooks/

Point 3 : https://medium.com/angularjs/simple-module-in-angular-2-2f4d8b809d99

Point 4 : https://blog.angularindepth.com/avoiding-common-confusions-with-modules-in-angular-ada070e6891f

Point 5 : https://blog.angular-university.io/angular2-ngmodule/

Point 6 : https://www.c-sharpcorner.com/article/understand-module-in-angular-2/

Point 7 : https://medium.com/coding-blocks/angular-6-routing-made-easy-part-1-f347c8a85947

Thursday, February 9, 2017

Hash table in C#

In C# hash table is the collection of key or values, which is used to map a key to value. We can use any non-null object as a key; we can retrieve the items from hash table by providing key.

The common function used in hash table is given below:

Add – used to add a pair of value to Hashtable

Syntax

HashTable.Add (Key, Value)

Hashtable h;

h.Add(“1”, “Sachin”);

ContainsKey – used to checked a specified key exist or not.

Syntax

bool HashTable.ContainsKey (key)

h.contains(“1”);

ContainsValue - used to checked a specified value exist or not.
Syntax

bool HashTable.Containsvalue (value)

h.containsvalue(“Sachin”);

Remove – used to delete specified key or values.
Syntax

HashTable.Remove(key)

h.remove(“1”)

Wednesday, February 1, 2017

Create a clone of asp controls in asp .net C# on button click

Create a clone of asp controls in asp .net C# on button click

I have faced a real time issue at my website, on button click the page creates duplicate control at my website. After searching, I found that I have missed closing tag of div, so any html tag if you missed occur duplicate control generation problem.

Solution : Missed any html closing tag.

Wednesday, January 18, 2017

What is tuple and how to declare it?

A tuple is s new data type introduced in .Net Framework 4.0. It is used when we want to store multiple values having different data type and without having a class to store the value, in this situation the tuple is best option. In other words a Tuple is a container that contains similar or different data type (7 items) and 1 Tuple.

Declaration of Tuple

The declaration of the Tuple is similar to dictionary <tkey, tvalue>

Tuple<t1>

Tuple<t1, t2, t3>

Tuple<t1, t2, t3, t4>

Tuple<t1, t2, t3, t4, t5>

Tuple<t1, t2, t3, t4, t5, t6>

Tuple<t1, t2, t3, t4, t5, t6, t7>

Tuple<t1, t2, t3, t4, t5, t6, t7, tRest>

T is any data type and tRest a tuple type.

Tuesday, January 17, 2017

Deconstruction in C# 7.0

Deconstruction is a process of split a variables value into parts and store it on new variables. It is important when a variable stores multiple values such as tuple.

The method GetATuple returns a tuple with three values.

Example:

(string name, string city, int sal) GetATuple(int id)

{

String name =string.empty;

String city=string.emplty;

Int sal=0;

If (id ==1000)

{

name=”Sachin”;

city=”Kanpur”;

sal=2000;

}

return(name, city, sal)

}

Sunday, October 9, 2016

How to upload file without post back in asp.net

In this article I am going to explain how to upload file with the help of "Handler" in ASP. net c#, My main focus to write this article is that, if you work with file upload control, the page requires full post back , and if your file upload control is inside update panel, the you must specifies you button submit in trigger like,

<asp:PostBackTrigger ControlID=""/>

</Triggers>

and this also cause the full post back problem, for removing this problem use "Handler" in ASP. net c#

UploadFile.ashx Code

<%@ WebHandler Language="C#" Class="UploadFile" %>

using System;

using System.Web;

using System.IO;

using System.Web.SessionState;

public class UploadFile : IHttpHandler, IRequiresSessionState

{

public void ProcessRequest(HttpContext context)

{

string filedata = string.Empty;

if (context.Request.Files.Count > 0)

{

HttpFileCollection files = context.Request.Files;

for (int i = 0; i < files.Count; i++)

{

HttpPostedFile file = files[i];

if (Path.GetExtension(file.FileName).ToLower() != ".jpg"

&& Path.GetExtension(file.FileName).ToLower() != ".png"

&& Path.GetExtension(file.FileName).ToLower() != ".gif"

&& Path.GetExtension(file.FileName).ToLower() != ".jpeg"

&& Path.GetExtension(file.FileName).ToLower() != ".pdf"

)

{

context.Response.ContentType = "text/plain";

context.Response.Write("Only jpg, png , gif, .jpeg, .pdf are allowed.!");

return;

}

decimal size = Math.Round(((decimal)file.ContentLength / (decimal)1024), 2);

if (size > 2048)

{

context.Response.ContentType = "text/plain";

context.Response.Write("File size should not exceed 2 MB.!");

return;

}

string fname;

if (HttpContext.Current.Request.Browser.Browser.ToUpper() == "IE" || HttpContext.Current.Request.Browser.Browser.ToUpper() == "INTERNETEXPLORER")

{

string[] testfiles = file.FileName.Split(new char[] { '\\' });

fname = testfiles[testfiles.Length - 1];

}

else

{

fname = file.FileName;

}

//here UploadFile is define my folder name , where files will be store.

string uploaddir = System.Configuration.ConfigurationManager.AppSettings["UploadFile"];

filedata = Guid.NewGuid()+ fname;

fname = Path.Combine(context.Server.MapPath("~/" + uploaddir + "/"), filedata);

file.SaveAs(fname);

}

context.Response.ContentType = "text/plain";

context.Response.Write("File Uploaded Successfully:" + filedata + "!");

//if you want to use file path in aspx.cs page , then assign it in to session

context.Session["PathImage"] = filedata;

}

public bool IsReusable

{

get

{

return false;

}

web.config code

<?xml version="1.0"?>

<!--

For more information on how to configure your ASP.NET application, please visit

http://go.microsoft.com/fwlink/?LinkId=169433

-->

<system.web>

</system.web>

</appSettings>

</configuration>

Default.aspx code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<%-- Should have internet connection for loading this file other wise inherit own js file for supporting js library--%>

function onupload() {

$(function () {

var fileUpload = $('#<%=FileUpload.ClientID%>').get(0);

var files = fileUpload.files;

var test = new FormData();

for (var i = 0; i < files.length; i++) {

test.append(files[i].name, files[i]);

}

$.ajax({

url: "UploadFile.ashx",

type: "POST",

contentType: false,

processData: false,

data: test,

success: function (result) {

if (result.split(':')[0] = "File Uploaded Successfully") {

document.getElementById("<%=lbl_smsg.ClientID%>").innerText = result.split(':')[0];

}

else {

document.getElementById("<%=lbl_emsg.ClientID%>").innerText = result;

}

error: function (err) {

alert(err.statusText);

}

});

})

}

</script>

</head>

<body>

<asp:ScriptManager ID="scmain" runat="server" ></asp:ScriptManager>

<asp:UpdatePanel ID="upmain" runat="server">

<legend>Upload File WithOut PostBack inside Update Panel</legend>

<asp:FileUpload ID="FileUpload" runat="server" />

<asp:Label ID="lbl_emsg" runat="server" ForeColor="Red"></asp:Label>

<asp:Label ID="lbl_smsg" runat="server" ForeColor="Green"></asp:Label>

</fieldset>

</ContentTemplate>

</asp:UpdatePanel>

</form>

</body>

</html>

Default.aspx code.cs code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

After uploading image