C# MVC ASP.net Dropdown List Change

hi,
I have write a code to when dropdownList change event, according to the dropdown number i need to change the records in the same page.

See below code
View
       <label>   @Html.DropDownList("LeadsID", (SelectList)ViewBag.Values, new { onchange="FindLeadDetails(this.value)" })</label>

 <label>Firs tname</label>
       @Html.TextBoxFor(fname => fname.Firstname)
       <label>Last Name</label>
       @Html.TextBoxFor(lname => lname.Lastname)
       <label>Comapny name</label>
       @Html.TextBoxFor(cname => cname.Companyname)
       <label>Address </label>
       @Html.TextBoxFor(model => model.Address1)

Open in new window


Model.cs

 private string connstring = ConfigurationManager.ConnectionStrings["UsersContext"].ConnectionString;
        public string LeadsOwner {get;set;}
        public string Title {get;set;}
        public string Firstname {get;set;}
        public string Lastname {get;set;}
        public string Companyname {get;set;}
        public string Address1 {get;set;}
        public string Address2 {get;set;}
        public string Address3 {get;set;}
        public string Address4 {get;set;}
        public string City {get;set;}
        public string TelephoneNumber  {get;set;}
        public string Webaddress {get;set;}
        public string LeadStatus  {get;set;}
        public string LeadsSource  {get;set;}
        public string Industry  {get;set;}
        public DateTime CreatedDate { get; set; }
        public string Email { get; set; }
        public SelectList LeadID { get; set; }
        public List<SelectList> LeadsID { get; set; }
        public IEnumerable<SelectListItem> Items { get; set; } 
        public void FindLeadsDetailsById(string LeadID)
        {
            string custTitle = string.Empty;
            SqlConnection con = new SqlConnection(connstring);
            con.Open();
            SqlCommand Leadscommand = con.CreateCommand();
            Leadscommand.CommandText = "SELECT LeadsID,Title,Firstname,Lastname,Companyname,Address1,TelephoneNumber,Webaddress,LeadStatus,LeadsSource,Industry FROM tblLeads WHERE LeadsID='"+LeadID+"'";
            SqlDataReader rdrReadr = Leadscommand.ExecuteReader();
            while (rdrReadr.Read())
            {

                Firstname = rdrReadr["Firstname"].ToString();
            
            
            }
            rdrReadr.Close();
            Leadscommand.Dispose();
            con.Close();
            
            //tblLeads

           
        }

        public List<SelectListItem> pupulateLeadsID()
        {
            string strLeadID = string.Empty;
            SqlConnection con = new SqlConnection(connstring);
             List<SelectListItem> itemsID = new List<SelectListItem>();
            con.Open();
            SqlCommand cmdLeadsID = con.CreateCommand();
            cmdLeadsID.CommandText = "SELECT LeadsID FROM tblLeads";
            SqlDataReader rdrLeadID = cmdLeadsID.ExecuteReader();
            while (rdrLeadID.Read())
            {
                itemsID.Add(new SelectListItem { Text = rdrLeadID[0].ToString(), Value = rdrLeadID[0].ToString() });
            
            }
            rdrLeadID.Close();
            cmdLeadsID.Dispose();
            con.Close();

            return itemsID;
        
        }

Open in new window


Controler

  public ActionResult UpdateLeads()
            {

                Leads ldl = new Leads();
                ViewBag.LeadsID = ldl.pupulateLeadsID();


                return View();
            }

            public ActionResult FindLeadDetails(string LeadID)
            {

                Leads ld = new Leads();
                ld.FindLeadsDetailsById(LeadID);



                return View(ld);
            }

Open in new window

LVL 10
ukerandiAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Prakash SamariyaIT ProfessionalCommented:
Wild guess, you could do such like:

//keep exisiting below code as it is
public ActionResult UpdateLeads() //your orginal Action UI
{ .... }

Open in new window


//New action method
public ActionResult UpdateLeads(Leads ld) //new Action UI
{
	//below line Changed
	Leads ldl =  (ld!=null)? ld: new Leads();
	ViewBag.LeadsID = ldl.pupulateLeadsID();

	//below line Changed
	return View(ldl);
}

//Modified existing action method
public ActionResult FindLeadDetails(string LeadID)
{
	Leads ld = new Leads();
	ld.FindLeadsDetailsById(LeadID);

	//below line Changed
	return View("UpdateLeads",ld);
}

Open in new window

0
ukerandiAuthor Commented:
Thanks How to change View
<label>   @Html.DropDownList("LeadsID", (SelectList)ViewBag.Values, new { onchange="FindLeadDetails(this.value)" })</label>

This part not working
0
Prakash SamariyaIT ProfessionalCommented:
You need to reset Viewbag like below:
//Modified existing action method
public ActionResult FindLeadDetails(string LeadID)
{
	Leads ld = new Leads();
	ld.FindLeadsDetailsById(LeadID);

	ViewBag.LeadsID = ld.pupulateLeadsID();

	//below line Changed
	return View("UpdateLeads",ld);
}

Open in new window

Try with code your original code
<label>   @Html.DropDownList("LeadsID", (SelectList)ViewBag.Values, new { onchange="FindLeadDetails(this.value)" })</label>

or try with new one if not working
<label>   @Html.DropDownList("LeadsID", (SelectList)ViewBag.LeadsID, new { onchange="FindLeadDetails(this.value)" })</label>

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
ukerandiAuthor Commented:
thx
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C#

From novice to tech pro — start learning today.