text box values in asp.net

Use hidden field in your case

I dont know what approach you are using but this may help you

if you have used the form then do like this

<asp:hiddenfield id="dsdfsdf" value="your id value" xmlns:asp="#unknown" />
<asp:textbox text="textvalue" mode="hold" xmlns:asp="#unknown" />

If you are using gridview then same thing you can do in template field used hidden fields


regards....:)

You Can use id without using hidden field...when you retrieve data in dataset put dataset in session and on textchanged retrieve data from dataset according to condition...
eg.

dataset ds=new dataset();
ds=your method to filldataset(on page load)..
session["ds"]=ds;

then on textchanged
call..
int id=session["ds"].select(your query)..(it returns datarow then use foreach loop to find particular column...)

:)