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 applicationi 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 .zipxit 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 filebut 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 SelectedIndexChangedthe age and name of correspoding employee number want to come from database. I tried to get it for number of timesbut 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 iswhile selecting employee number in DropdownListthe 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 selectingindexchangedthe 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 yesthats correctbut 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 isi 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.