How To Disable Checkbox using JavaScript

To Disable HTML checkbox using javascript use the following script

document.getElementById("chkRed").disabled = true;

To Enable change true to false

document.getElementById("chkRed").disabled = false;

where chkRed is the id of your Checkbox

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How to bind Asp DropDownList Value and text

In order to bind Asp DropDownList value and text field use the following method

lets day DroDownList id is "ddl"

 List<taqi> objlist = new List<taqi>();
                taqi objt = new taqi();
                objt.Id = "2";
                objt.Name = "Taqi";
                objlist.Add(objt);   // adding item in list

                objt = new taqi();
                objt.Id = "1";
                objt.Name = "Ali";
                objlist.Add(objt);   // adding item in list
                                             // so we have added two items in list now we will bind dropdownlist

                ddl.DataSource = objlist;  
                ddl.DataTextField = "Name";    //Name field is define in the class called taqi
                ddl.DataValueField = "Id";        // Id field is define in the class called taqi
                ddl.DataBind();                        // finally we bind the dropdownlist

For your convenience here is the class source code

  public class taqi
    {

        private string id;

        public string Id
        {
            get { return id; }
            set { id = value; }
        }

        private string name;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }
    }

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Visual Studio Shortcuts

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                   Ctrl + E + C

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• To Collapse Current Line

                

• Add missing namespace

                   Ctrl + .

Restrict Numbers from being entered in Textbox using jQuery

How to restrict user from entering Numbers (0-9) inside textbox Field

 $("#TextBoxID").keypress(function (e) {
               
                if (e.which >= 65 && e.which <= 90 || e.which >= 97 && e.which <= 122) {

                }
                else return false;
            });

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How to create JaggedArray in C#

A Jagged Array is an Array of Array

   string[][] Arr = new string[3][];
            
            Arr[0] = new string[3];
            Arr[1] = new string[2];
            Arr[2] = new string[1];

            Arr[0][0] = "Bachelor";
            Arr[0][1] = "Masters";
            Arr[0][2] = "PHD";

            Arr[1][0] = "Bachelor 1";
            Arr[1][1] = "Masters  1";

            foreach (string[] b in Arr)
            {
                foreach (string a in b)
                {
                    Console.WriteLine(a);
                }
            }

            Console.ReadKey();


            // we can also create a JaggedArray of type object 

            object[][] arr2 = new object[3][];

            arr2[0] = new object[3];
            arr2[0][0] = 1;
            arr2[0][1] = "String";
            arr2[0][2] = Arr;

I Hope it was informative for you and I would like to Thank you for reading