storing column value of each row in dataset into string[ ]

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hello everyone,
i have a dataset with one table having 39 rows. now i wanna store the value of my id column value in a separate array like string[] ids.
i have define my array like this:
string[] ids = null;

and i m using this line to store values in this array:
for ( int i = 0; i < mydataset.Tables[0].Rows.Count; i++)
{
ids[i] = mydataset.Tables[0].Rows[i]["id"].ToString();
}

The Problem is that id column value is fetched but is not stored in ids array. it just throw an exception like Object reference not set an instance to an instance of object.
but when i use debug mode to inspect my code, my "id" column value is being fetched but is not stored in ids array.
can anyone help?? what I m missing??
thanks...

Posted 4-Oct-13 21:13pm

ziafahad

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Comments

Animesh Datta 5-Oct-13 3:29am

Hello ,
I think there is no such column name 'id' in your dataset . you just check the proper name and then try it.

thanks
Animesh

ziafahad 5-Oct-13 3:53am

i checked and id column is there. and I have said in my question that debugging my code, id column value is fetched but is not stored to ids array...

Animesh Datta 5-Oct-13 3:58am

Hello,
you have to define the array length.
example ...
string[] arr = new string[50];

thanks

2 solutions

Solution 1

you should define length of string array

Posted 4-Oct-13 21:28pm

Kamran Ayati

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Atul Pachori · Accepted Answer · 2013-10-04T23:19:00

Solution 2

you should define the length of string

string[] ids = null;

ids=new string[mydataset.Tables[0].Rows.Count];

for ( int i = 0; i < mydataset.Tables[0].Rows.Count; i++)
{
ids[i] = mydataset.Tables[0].Rows[i]["id"].ToString();
}

Posted 4-Oct-13 23:19pm

Atul Pachori