How to pass a value from .aspx.cs to aspx page

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i am beginner in this so i want to know how to pass a value from .aspx.cs page to .aspx page

the reason is i want to display the primary key column in the gridview .
i don't know the database and table i am selecting the database and table through dropdownlist so i want to pass the primary key column to the

C#

Eval("here")

. i am determined primary key column through query so please tell me how can i pass that to aspx page this please....

Posted 3-Jan-13 0:24am

Member 9644686

Updated 3-Jan-13 0:32am

Suvabrata Roy

v2

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Nilesh Rokade · Answer 1 · 2013-01-03T00:45:00

Solution 2

You can use hidden field. Set value is your cs code .

e.g

You can access it in cs file as
Request.Form["hiddenfield1"];

Posted 3-Jan-13 0:45am

Nilesh Rokade

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Member 9644686 3-Jan-13 7:07am

send some code snippets regarding hidden field please...

*Suvabrata Roy* · Answer 2 · 2013-01-03T00:32:00

Solution 1

Create a property in you cs page and bind that property in that eval tag.

Now set the column name to that property.

The property should be a string.

[Update]

Whenever you fetch query alias all primary key filed as ID

now

C#

Eval("ID")

Posted 3-Jan-13 0:32am

Suvabrata Roy

Updated 3-Jan-13 1:14am

v2

Comments

Member 9644686 3-Jan-13 6:47am

i am doing like this but i can't get
assume primary_key_column= Empid.

in cs page
got the primary_key_column as Empid

in aspx page i am written like this

<%# Eval("<%=primary_key_column%>") %>

but i am getting a error

Suvabrata Roy 3-Jan-13 6:48am

What error

Member 9644686 3-Jan-13 7:01am

Error means that primary_key_column is display in gridview.

Member 9644686 3-Jan-13 7:05am

Coompilation error

Suvabrata Roy 3-Jan-13 7:14am

Refer to update block

Member 9644686 3-Jan-13 7:27am

means

Suvabrata Roy 3-Jan-13 7:57am

Please view my solution again, and i have some update over their