Selecting an item in an ASP.NET DropDownList Programmatically

This tip shows how to select an item in an ASP.NET DropDownList control programmatically.

Mahesh Chand

The text of this article is not in this database — only its details are. The old site it was published on is gone, but the Internet Archive kept a copy: Selecting an item in an ASP.NET DropDownList Programmatically

DropDownListasp.net DropDownListitem selectionselect item

2 Comments

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Bhushan Joshi18y ago
Hi, Currentlly i am working on a web application where i require to fill the web form with the selected item in a text box. for example i have dropdown control named supplier_name, and i want to fill all the other controls values from database on the form when i select name from that supplier_name box,i.e , if i select name1, then related to that name, its code,address ,city should appear on related text boxes. I have done the same in windows application with c# , but the problem with web application(asp.net) is that, when i select Supplier _ it reloads the page and i loose the values in that combo box...i have heard of postback method but i donno how to use it to implement the same. please any one send me answer
- Alex Rivenbark18y ago
  Hi. Hows it going? ASP.NET usually incorporates view state by default; which means that data is preserved during round trips to the server (postback). I would assume that your problem is occuring because you are loading values into the dropdownlist box during the load event of the page. This can be solved by surrounding the code within this event handler with an if statement. I know that in C#, the code would be: if (! IsPostback){ load the dropDownListBox here } I am not sure what the VB code would be, but I am fairly sure that should solve your problem. Be in touch with an update. Take care.