How Do I Change One Column Content In DataTabe

Question

0.00/5 (No votes)

See more:

hi all

C#

C# Problem

i have a data table with 5 columns

column 4 is Georgian Date

how do i change

C#

all content of this column (Column 4)

and save it again (save in column 4 again == each data after changed placed in old place )

for example :

i have this data table :

C#

a   b   c   d   e   f
a   b   c   d   e   f
a   b   c   d   e   f
a   b   c   d   e   f

after change e to z data table like below :

C#

a   b   c   d   z   f
a   b   c   d   z   f
a   b   c   d   z   f
a   b   c   d   z   f

how do i ?

Please Help Me

Thanks A Lot

Posted 19-May-12 8:02am

Esmaeil Ebrahimi

Add a Solution

Comments

VJ Reddy 21-May-12 3:00am

Thank you for accepting the solution :)

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Wendelius · Accepted Answer · 2012-05-19T08:22:00

Solution 1

You can for example loop through the data rows and modify the values of each row. Something like this (code not checked with the compiler)

C#

foreach (System.Data.DataRow row in mydatatable.Rows) {
   row[4] = "Z";
}
mydatatable.AcceptChanges();

Afterwards, you can save the datatable somewhere (to a file, database etc).

Posted 19-May-12 8:22am

Wendelius

Comments

VJ Reddy 20-May-12 1:35am

Good answer 5!

Wendelius 20-May-12 3:07am

Thanks :)

VJ Reddy · Accepted Answer · 2012-05-19T19:48:00

The answer 1 is good.
As an alternative if you want to use LINQ then the following code can be used

C#

data.AsEnumerable().Where(dr => dr.Field<string>(4)=="e")
        .Select(dr => dr.SetField<string>(4,"z")).Count();

Where data is the DataTable
The LINQ has deferred execution, so it will not execute the query until the sequence returned is iterated or a scalar function like Count is called. Hence, Count is called in the above code to immediately execute the query.