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500pts: Extracting data from a table object?

Posted on 2006-07-20
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Last Modified: 2010-04-16
Hi..

Can anyone help, I seem to be having a problem getting data from a table.. I have a table and if i do

? myData.Table.Rows.Count

I get 1, so data is there...

I have tried various things like

I tried myData.Table.Columns["TOTAL"]

but there is no property VALUE for example...

Can anyone suggest what i am doing wrong?

Thanks in advance

Ian


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Question by:ianinspain
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9 Comments
 
LVL 23

Expert Comment

by:apresto
ID: 17145524
Hi ianinspain,

what object is myData : DataTable, DataTableCollection?

Apresto
0
 
LVL 29

Assisted Solution

by:Gautham Janardhan
Gautham Janardhan earned 250 total points
ID: 17145545
assuming that you are using datatable collection

the problem is that by stating Datatable.Table.columns[0]
u get the first column element

what u got to do is
myData.Table.Rows[i]["TOTAL"]
i is the row index i.e first row would be
myData.Table.Rows[0]["TOTAL"]
0
 

Author Comment

by:ianinspain
ID: 17145800
Thanks gauthampj,

That sort of works.. I get this

? myData.Table.Rows[0]["BO"]
{130.1}
    System.ValueType: {System.Double}
    Epsilon: 4.94065645841247E-324
    m_value: 130.1
    MaxValue: 1.7976931348623157E+308
    MinValue: -1.7976931348623157E+308
    NaN: NaN
    NegativeInfinity: -Infinity
    PositiveInfinity: +Infinity

But i really need just the value, i did try ToString but that didn't give the details either...

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LVL 3

Expert Comment

by:BBK_
ID: 17146127
myData.Table.Rows[0][0].ToString(), this should give you the first value in the first column
If it has value then , I think there may not be any column named "TOTAL"
0
 

Author Comment

by:ianinspain
ID: 17146237
No it works... but doing ToString doesn't give me the value..

0
 
LVL 3

Expert Comment

by:BBK_
ID: 17146253
U mean myData.Table.Rows[0][0] has value, but
myData.Table.Rows[0][0].ToString() throws error, rite?
0
 
LVL 3

Accepted Solution

by:
BBK_ earned 250 total points
ID: 17146321
Just a sample code


DataTable d = new DataTable();
d.Columns.Add("Test", typeof(System.String));
DataRow r = d.NewRow();
r[0] = "TESTCOLUMN";
d.Rows.Add(r);

MessageBox.Show(d.Rows[0][0].ToString());
0
 

Author Comment

by:ianinspain
ID: 17146927
Thanks BBK, yes i did try this... here is what i get.... If the column is a string then no probs....  But my column is a Double

? response.Data.Tables[0].Rows[0][1]
{0.0}
    System.ValueType: {System.Double}
    Epsilon: 4.94065645841247E-324
    m_value: 0.0
    MaxValue: 1.7976931348623157E+308
    MinValue: -1.7976931348623157E+308
    NaN: NaN
    NegativeInfinity: -Infinity
    PositiveInfinity: +Infinity
? response.Data.Tables[0].Rows[0][1].ToString
<overloaded>
    ToString: ((System.Double)((response.Data.Tables[0].Rows[0].get_Item(1)))).ToString+0 // method+offset
    ToString: ((System.Double)((response.Data.Tables[0].Rows[0].get_Item(1)))).ToString+0 // method+offset
    ToString: ((System.Double)((response.Data.Tables[0].Rows[0].get_Item(1)))).ToString+0 // method+offset
    ToString: ((System.Double)((response.Data.Tables[0].Rows[0].get_Item(1)))).ToString+0 // method+offset
0
 

Author Comment

by:ianinspain
ID: 17146986
ahh .. thnaks.. I got it

Double.Parse( response.Data.Tables[0].Rows[0][1].ToString())

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