Can i get seleted value from DropDownList with AutoPostBack='false' using C# code?

Question

Dear All,

I am doing an application in ASP.net with C#.In my application,i need to get seleted value from DropDownList with AutoPostBack='false' using C# code.Is it possible to get it?
Any help will really appreciable.

Best regards,
Fuad Pulpadan

Jignesh Trivedi · Answer

hi, Actually, This files are ziped in winzip version 15. so you get error unrecognized format.

fuad pulpadan · Answer

Dear Jignesh, I have downloaded the file webapplicationtest.zip.But while renaming it to .zipx,it is going to unrecognized format and cannot be open.What you mean about renaming?Just rename into .zipx format right? Pls reply . Best regards, Fuad

Jignesh Trivedi · Answer

hi, Download attachment and rename it to .zipx. Attechment is whole project. Let me know if you have trubble in download files.

fuad pulpadan · Answer

Thank you for reply Jignesh, I have downloaded the .zip file,but there is no .aspx file with it.pls reply. Best regards, Fuad

Jignesh Trivedi · Answer

hi, No it is not possible to access server code @ javascript. but you can do one thing that provided in attechment. Download attachment and rename it to .zipx. In this project run controlTest.aspx In this solution I post data on sever using Jquery and process at server return value. hope this will help u.

fuad pulpadan · Answer

Thank you so much Jignesh, This is what am searching.thank u so much..In my application while SelectedIndexChanged,the age and name of correspoding employee number want to come from database. I tried to get it for number of times,but getting error. Is it possible to write C# code (Like SqlConnection and SqlCommand) in Javasript? Pls reply, Fuad Thanks,

Jignesh Trivedi · Answer

hi, Try... ASPX: http://www.w3.org/1999/xhtml "> function dropdownchange(obj) { var data = obj.value.split('^'); document.getElementById("txtEmpName").value = data[0]; document.getElementById("txtAge").innerHTML = data[1]; } Name : Age : CS.... public partial class ControlTest : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { FillDropDown(); } } public void FillDropDown() { List emp = new List (); //EmpDetail is Name an age combination seprated by ^. you can use anycombination emp.Add(new EmpDetails { EmpId = "Select", EmpDetail = "^" }); emp.Add(new EmpDetails { EmpId = "1000", EmpDetail = "Jignesh Trivedi^27" }); emp.Add(new EmpDetails { EmpId = "1001", EmpDetail = "Tejas Trivedi^29" }); emp.Add(new EmpDetails { EmpId = "1002", EmpDetail = "Rakesh Trivedi^20" }); drpEmpId.DataSource = emp; drpEmpId.DataTextField = "EmpId"; drpEmpId.DataValueField = "EmpDetail"; drpEmpId.DataBind(); } } public class EmpDetails { public string EmpId {get;set;} public string EmpDetail {get;set;} } this is the one way to display name and age. hope this will answer of your que.

fuad pulpadan · Answer

Thanks to Keyur & Jignesh for reply, Actually what i am doing is,while selecting employee number in DropdownList,the name of the selected employee is showing in other DroDownList and his age is showing in label.But while selectedindexchanged the entire page is refreshing.Now i am using UpdatePanel for avoiding this page refreshing.But after selectingindexchanged,the appearance of DropDownList is changing.How can we rectify this problem?Can we avoid page refreshing other than UpdatePanel and fill employee name and age in corresponding Dropdownlist and label? Pls reply, Fuad

Keyur Narkhi · Answer

Hi What you want to do exactly.see If you simply want the dropdownlist selected items then you do not require the AutoPostback = "true". But If you want to do some actions in SelectedIndex change event then you need to set Autopostback="true".You can use Updatepanel if your site is Ajax enabled. Please give more idea what you want to do. Thanks

Jignesh Trivedi · Answer

hi, we can use Java script insted of updatepanel. but all code done client side. but what is actual requirement?

fuad pulpadan · Answer

Thanks Keyur, If we are using AutoPostBach="true" the entire web pabe is refreshing.Is it possible to avoid page refreshing without using 'UpdatePanel'. Pls reply, Fuad

Keyur Narkhi · Answer

Hi No if you want to handle SelectedIndex change event you need to set AutoPostBack = "true"

fuad pulpadan · Answer

Thanks Keyur, yes,thats correct,but i need to get these values and store it in variables in DropDwonList SelectedIndex changed event with AutoPostBack='false'.Is it possible? Pls reply, Fuad Pulpadan

MuthuMari M · Answer

Hi, yes. you can get the selected values and text, you have to assign these in separate variables. for ex string str1, v; v = DropDownList1.SelectedValue; str1 = DropDownList1.SelectedItem.Text; thanks. If this post is useful then mark it as " Accepted Answer "

Keyur Narkhi · Answer

Hi For selecting text and value you can use dropdown1.SelectedItem.Text - using this you can get selected text dropdown1.SelectedItem.Value - using this you can get selected value. Hope this helps.

fuad pulpadan · Answer

Thanks for reply..my problem is,i want to get both selected value and selected text from dropdownlist and store it in variable.This variable will be using in some other operation.Is it possible?thanks. Regards, Fuad

Senthilkumar · Answer

Hi, There is no relation between the selected value and AutoPostBack. The AutoPostBack property is set to true then it will automatically post back to the server and will run the indexchanged event in the drop down. If you want to perform any operation based on the selection then you need to do this. If you have any other control with the event, when click on the button if you want to get the selected value then you can get it if any thing selected. By default, AutoPostBack property will be false. If any item is selected then you can simply get the selected value of the drop down list.

Can i get seleted value from DropDownList with AutoPostBack='false' using C# code?

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