Issue with Dataset.tables[0].select ()

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Hi,
i have a dataset which contains a table "ClassName" with 2 columns "ID"(int) and "class"(string) and many rows in the table and when i used
DataRow[] aRow=dataset.Tables[0].Select("ID=2 and class='second'")
it's not returning rows into the datarow for given column values and if i change the select statement as Select("ID='2' and class='second'") it"s returning correctly.So why should i provide value in single quotes which is an int.

Please help me regarding the same...

Posted 20-Apr-11 1:46am

siva455

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Sandeep Mewara · Answer 1 · 2011-04-20T04:17:00

Solution 1

it's not returning rows into the datarow for given column values and if i change the select statement as Select("ID='2' and class='second'") it"s returning correctly

Well, this simply means and tells you that in the datatset all of them is stored as a string. ID value might be an integer but is stored as a string and thus using quotes convert the integer to string and filter works as expected.

Posted 20-Apr-11 4:17am

Sandeep Mewara

Comments

Nish Nishant 20-Apr-11 10:19am

Voted 5, proposed as answer.

Sandeep Mewara 20-Apr-11 10:52am

Thanks again! :)

Nish Nishant 20-Apr-11 10:53am

You are welcome!

siva455 20-Apr-11 11:51am

In dataset and database the type is int only

Sandeep Mewara 20-Apr-11 11:59am

Well, your filter not working simply implies it is not integer in the dataset. Simple!

Nish Nishant · Answer 2 · 2011-04-20T04:20:00

Solution 2

[Adding to what Sandeep said]

First of all, the reason for this is quite obvious. And if you want to treat it as an int, then change the type in your data table (and perhaps correspondingly in your DB table too).

Posted 20-Apr-11 4:20am

Nish Nishant

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siva455 20-Apr-11 11:49am

In dataset and database the type is int only

Nish Nishant 20-Apr-11 11:50am

How did you verify that?