?
Solved

Load string into datatable

Posted on 2008-06-17
12
Medium Priority
?
1,081 Views
Last Modified: 2010-05-18
Hi Experts!

I have a tab delimited string loaded from an http site. This is not a file, it is a string obtained trough and HttpWebRequest and contains serveral lines of tab delimited values.

Which would be the best method to load this into an SQL server table?

Thanks!!!
0
Comment
Question by:glopezz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 6
12 Comments
 
LVL 32

Expert Comment

by:Daniel Wilson
ID: 21805827
What is the structure of your table?

The string is tab-delimited ... should each element be a different row?  Or each a different field in a single row?
0
 

Author Comment

by:glopezz
ID: 21805940
The table has the same column structure as the string:

DATE-VALUE1[float]-VALUE2[float]-VALUE3[float]

the string has the same columns per row, but tab delimited.

Thanks!!
0
 
LVL 32

Expert Comment

by:Daniel Wilson
ID: 21812104
This should get you close ... I've got some syntax a bit off, but the concepts are here.
dim arVals() as string
dim SQL as string
arVals = Split(TabDelimitedString, vbTab)
 
'set up a command object w/ connection string ... details omitted
 
SQL = "Insert Into MyTable(Field1, Field2, ...FieldN) Values (@Val1, @Val2, ...@ValN)"
 
cmd.CommandText = Sql
 
'next block is psuedocode
foreach Val in arVals
   cmd.Parameters.Append New Param for this value
next
 
cmd.executeNonQuery

Open in new window

0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 

Author Comment

by:glopezz
ID: 21812195
Thanks Daniel

Could you be a little more specific on the line:

cmd.Parameters.Append New Param for this value

?

If we have, let's say, 1000 lines in the string, are we sending 1000 sql commands to the server?

Thanks
0
 
LVL 32

Expert Comment

by:Daniel Wilson
ID: 21812608
No, you're adding 1000 parameters to the one statement.

Do you really have 1000 fields in your table?
0
 

Author Comment

by:glopezz
ID: 21812661
This is minute by minute information, at the end of one day we would have 60X60X24 fields.

Could you explain a little more how to add the parameters?

Thanks
0
 
LVL 32

Expert Comment

by:Daniel Wilson
ID: 21812852
Please tell me that really is 60 * 60 * 24 ROWS, not fields!  

Your table is only going to support about 8000 bytes in a given row.

I'll come back in a few minutes w/ code based on the idea of having 1 Row per second, not one field per second.
0
 

Author Comment

by:glopezz
ID: 21813105
Sorry Daniel, I thought you were asking about rows! They are fields :P

0
 

Author Comment

by:glopezz
ID: 21813118
It is 60 * 60 * 24 ROWS, with 4 columns per row.. sorry again! This is how it should work.
0
 
LVL 32

Expert Comment

by:Daniel Wilson
ID: 21813322
4 columns -- that sounds good.

What are the 4 columns -- so the code I write will be close to correct for you?
0
 

Author Comment

by:glopezz
ID: 21813553
first one is a datetime, the others are float values (numbers with 3 decimals).
0
 
LVL 32

Accepted Solution

by:
Daniel Wilson earned 1500 total points
ID: 21815250
This one should be close
dim arVals() as string
dim SQL as string
dim i as Int32
 
arVals = Split(TabDelimitedString, vbTab)
 
'set up a command object w/ connection string ... details omitted
 
SQL = "Insert Into MyTable(Field1, Field2, Field3, Field4) Values (@Val1, @Val2, @val3, @Val4)"
 
cmd.CommandText = Sql
 
cmd.Parameters.append (new SqlClient.SqlParameter("@Val1", SqlDBType.DateTime
cmd.Parameters.append (new SqlClient.SqlParameter("@Val2", SqlDBType.Float
cmd.Parameters.append (new SqlClient.SqlParameter("@Val3", SqlDBType.Float
cmd.Parameters.append (new SqlClient.SqlParameter("@Val4", SqlDBType.Float
 
for i = 0 to (arVals.LBound-1 ) /4
   cmd.Parameters("@Val1).Value = arVals(i*4)
   cmd.Parameters("@Val2).Value = arVals(i*4) +1
   cmd.Parameters("@Val3).Value = arVals(i*4) +2
   cmd.Parameters("@Val4).Value = arVals(i*4) +3
 
   cmd.ExecuteNonQuery
next i
  

Open in new window

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question