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How to use Arraylist in C# Using Asp.Net

02:17:00 ArrayList, Asp.Net, C# No comments

Arraylist in C# Using Asp.Net

ArrayList is the one of the easiest and flexible data structure in the c# . Arraylist size is dynamically increased if user required . user create various datatypes int,string etc by arraylist.

ArrayList arrlist = new ArrayList();

ArrayList property is having many types Capacity,Count,Clear,Contrains,IndexOf,Remove,Sort,Reverse,Insert,Range etc...

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

Response.Write("Result Is == "+ lia.IndexOf("Dotnet"));

Check Indexof from arraylist condition true Index Position 0

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

Response.Write("Result Is == "+ lia.IndexOf("Dotne"));

Check Indexof from arraylist condition False Index Position -1

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

Response.Write("Result Is == "+ lia.Count);

Arraylist Count the total values (3)

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

Response.Write("Result Is == "+ lia.Contains("Drizzles"));

Check Contains Drizzles from arraylist Result is True

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

Response.Write("Result Is == "+ lia.Contains("Drizz"));

Check Contains Drizz from arraylist Result is False

Code:

ArrayList lia = new ArrayList();

lia.Add("blogspot.in");

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Sort();

foreach (string s in lia)

{

Response.Write(s.ToString());

}

Sort the Arraylist Result is Ascending order

Code:

ArrayList lia = new ArrayList();

lia.Add("blogspot.in");

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Reverse();

foreach (string s in lia)

{

Response.Write(s.ToString());

}

Reverse the Arraylist Result is Descending order

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

lia.RemoveAt(2);

foreach (string s in lia)

{

Response.Write(s.ToString());

}

Remove the Arraylist 2 index

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

//GetRange(start index , count)

ArrayList range = lia.GetRange(1,2);

foreach (string s in range)

{

Response.Write(s.ToString());

}

Get Range From Arraylist Range(1,2) - Index start 1, count 2

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

lia.Insert(2, ".");

foreach (string s in lia)

{

Response.Write(s.ToString());

}

Insert to the Arraylist in . Insert(2,".") - 2 is index , . is insert value

Code:

ArrayList lia = new ArrayList();

lia.Add("Dotnet");

lia.Add("Drizzles");

lia.Add("blogspot.in");

//LastIndexOf(object value,Index,count)

Response.Write(lia.LastIndexOf("Dotnet", 0, 0) + "<br/>");

Response.Write(lia.LastIndexOf("Dotnet",0,1));

LastIndexOf search object value,index,count from Arraylist

Bind Arraylist with DropdDownList in Asp.Net C#

06:01:00 ArrayList, Asp.Net, C#, DropDownList No comments

Bind Arraylist with DropdDownList

Dropdownlist Bind From The Arraylist Items Values Using in Asp.Net C#.

DEMO

Download

HTML Coding

</head>

<body>

<asp:DropDownList ID="ddlCourse" runat="server"></asp:DropDownList>

</div>

</form>

</body>

</html>

C# Coding

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Collections;

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

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

ArrayList Course = new ArrayList();

Course.Add("ASP.NET");

Course.Add("C#.NET");

Course.Add("DropDownList");

Course.Add("GridView");

Course.Add("SQL Server");

ddlCourse.DataSource = Course;

ddlCourse.DataBind();

}

First Add New Web Form - Add Dropdownlist From Toolbox

Next - Create Arraylist Add List For Array list & Bind To Dropdownlist

Difference Between ArrayList And GenericList in Asp.Net

03:21:00 ArrayList, Difference, GenericList No comments

Difference Between ArrayList And GenericList

	ArrayList	GenericList
1	ArrayList is not Type Safe. using System.Collections;	GenericList is Type Safe. using System.Collections.Generic
2	Can Store Anything in ArrayList like int, string and datetime.	Only Specfic Data Type like int, string and datetime.
3	ArrayList AList = new ArrayList(); AList.Add(012345); AList.Add("DotNet"); AList.Add(DateTime.Now);	List<string> LString = new List<string>(); LString.Add("DotNet"); LString.Add(".Net"); LString.Add("Dot.Net")
4	ArrayList Stores All Data as Object thus Call Related DataType Correctly.	Generic List Stores All Data of the Data Type No Type Conversion Need.
5	int number = Convert.ToInt32(AList[0]); DateTime DT = Convert.ToDateTime(AList[1]); string Name = AList[2].ToString();	string name = LString[0]; string name = LString[1];