How can I link dropdwon list with text box in ASP using C#

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i have tow dropdownlists the first dropdownlist is a category of items
and second dropdownlist is items and have text box is prise of item
>> i want to do when i select itemname from dropdownlist2 the prog.
print item prise which i selected from dropdownlist in a textbox as a out put

What I have tried:

i havebeen connect the program to database (sql server 2008) and linked category with items in dropdownlists but i cant linked txtbox with items to print item prise from database

Posted 6-Feb-17 9:36am

Member 12985916

Updated 6-Feb-17 19:16pm

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[no name] 6-Feb-17 15:40pm

"i cant linked txtbox with items to print item prise from database", and why can't you?

SmartDeveloping 6-Feb-17 17:02pm

Is this needed in C#? Javascript?

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R. Glenn Walker · Answer 1 · 2017-02-06T10:35:00

Not quite clear on the ask. I get that you have 2 drop downs. One for category, the second for a specific product. The textbox is to display the price?

One question for me would be if you are doing this in ASP.NET MVC?

When I have done similar things in an ASP.NET MVC application, the solution I might suggest is to have a trigger on the second box to call a simple webapi that would return the price for the product selected.

Calling the webapi can be done very simply using a bit of javascript. If you are familiar with using JQuery, it is simple to attach a script to the change event of the second drop down and then make the call to get the price which is then populated into the text box.

Here is a link to an article that dicusses the approach. http://stackoverflow.com/questions/15239782/calling-webapi-from-jquery

Karthik_Mahalingam · Answer 2 · 2017-02-06T19:16:00

Solution 2

refer this
Populate TextBox based on DropDownList Selection in ASP.Net using C# and VB.Net[^]

Posted 6-Feb-17 19:16pm

Karthik_Mahalingam