Manipulating Datasets

Question

0.00/5 (No votes)

See more:

I have a dataset which fetches the information from a Registration table. This able has a column "RegistrationDate".

I am trying to get the data in the dataset - in it I want to retrieve just the date part of the column.

VB

for each drow as data.datarow in ds.tables("Registration").rows
 dim dt as datetime = ctype(drow.item("RegistrationDate"),datetime)
 drow.item("RegistrationDate") = dt.date
next

I know something is wrong, because when I read the dataset again, I do not get the changed value.

Posted 22-Aug-10 6:24am

freefika

Updated 22-Aug-10 8:12am

Sandeep Mewara

v2

Add a Solution

6 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)

Sandeep Mewara · Answer 1 · 2010-08-22T08:15:00

Did you tried to debug?

First check if the date was fetched correctly in string format.
Then check if the casting to datetime was correct such that you didn't loose the time
Lastly, use the Dates toLongDateTimeString() proerty if needed.

VB

drow.item("RegistrationDate") = dt.date

Here after dt, press the dot and check for available properties to get date string. Further, once the string is casted to datetime, you can specify specific format to present the datetime.

alrosan · Answer 2 · 2010-08-22T08:43:00

Solution 2

<br />
 Dim dt As Data.DataTable = ds.Tables("Registration")<br />
        Dim lst As New List(Of DateTime)<br />
        For Each _row As Data.DataRow In dt.Rows<br />
            lst.Add(_row("RegistrationDate"))<br />
        Next<br />

Posted 22-Aug-10 8:43am

alrosan

Bryian Tan · Answer 3 · 2010-08-22T15:07:00

Solution 3

hello,

I think the code is fine. It should throw an exception if the date is not in correct format. Make sure the applciation does not re-populating the "Registration" table after the manipulation.

Posted 22-Aug-10 15:07pm

Bryian Tan

freefika · Answer 4 · 2010-08-22T15:29:00

Solution 4

Immediately after changing the date in the dataset, i am binding it to a gridview. I have debugged, the value shows correctly while debugging, but when binding it to the gridview, i still get the old value!

Posted 22-Aug-10 15:29pm

freefika

Manivannan Shan · Answer 5 · 2010-08-22T19:29:00

Solution 5

<asp:datagrid id="DataGrid1" autogeneratecolumns="false" xmlns:asp="#unknown">
EnableViewState="False" runat="server">
<columns>
<asp:BoundColumn DataField="RegionalID" />
<asp:BoundColumn DataField="RegistrationDate"
DataFormatString="{0:MM/dd/yyyy}" />
</columns>
</asp:DataGrid>

Posted 22-Aug-10 19:29pm

Manivannan Shan

freefika · Answer 6 · 2010-08-22T23:24:00

Solution 6

I'm sorry i did not mention, i did try the dataformatstring but it does not work. THe date is still shown with the time string!

Posted 22-Aug-10 23:24pm

freefika

Manipulating Datasets

6 solutions

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Add your solution here

Preview 0

Existing Members

...or Join us