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Creating a flat file from a datatable using c#

Posted on 2012-04-03
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Last Modified: 2012-04-04
I am working on creating a flat file from a datatable. I have not been able to get this to work. Attached is my specification and dotnet code. Also could you take a look at my sql and see what am doing wrong. The text file is generated but the columns are not in the right position.

Here is the sql

select
substring(Year, 1,4) as "AWARD-YEAR",
 substring(Social_Security_Number,1,9)as SSNO ,
 substring("Alternate ID",1, 10)as "id-alt",
 substring(Last_Name_Applicant,1,16)as "NAME-L",
substring(First_Name_Applicant,1,11)as "NAME-F",
substring(Middle_Initial_Applicant,1, 1)as "NAME-M",
 substring("Fund External Name", 1,35)as "fund_external_name",
 substring("Award Amount",1,5)as AWARDAMT
 from studentinfo
code.txt
Specification.JPG
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Question by:Sirdots
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5 Comments
 
LVL 75

Accepted Solution

by:
Anthony Perkins earned 2000 total points
ID: 37804257
Unfortunately without knowing the schema for your table with all the data types it is difficult to know for sure why you "have not been able to get this to work"

SELECT  LEFT([Year], 4) [AWARD-YEAR],
        LEFT([Social_Security_Number], 9) [SSNO],
        Left([Alternate ID], 10) [id-alt],
        LEFT([Lt_Name_Applicant], 16) [NAME-L],
        LEFT([First_Name_Applicant], 11) [NAME-F],
        LEFT([Middle_Initial_Applicant], 1) [NAME-M],
        LEFT([Fund External Name], 35) [fund_external_name],
        LEFT([Award Amount], 5) [AWARDAMT],
        SPACE(909) Filler
FROM    studentinfo

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It might be helpful if you could share with us what you mean by 'not been able to get this to work".
0
 

Author Comment

by:Sirdots
ID: 37804457
Thanks acperkins. Attached is the structure of the table. what I mean by "have not been able to get this to work" is that the columns did not align in the appropriate places. The output should follow what is stated in the attached specification document. There were so many spaces after each column.
I also dont want the field names to show if the flat file is generated. The field names appear on the first line.
tablestructure.JPG
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 37804521
It looks like all the columns are character data so it should return the right value.  As to the column headers, I don't do C#, but I suspect this is your culprit:
for (i = 0; i < dt.Columns.Count - 1; i++)                
        {  sw.Write(dt.Columns[i].ColumnName + " \t "); 
        }                
sw.Write(dt.Columns[i].ColumnName);                
sw.WriteLine();

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0
 

Author Comment

by:Sirdots
ID: 37806237
I think I got it to work now. I will test now.
0
 

Author Comment

by:Sirdots
ID: 37807586
I will close this now. Thanks.
0

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