INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

OleDbDataAdapter Peculiarity

OleDbDataAdapter Peculiarity

(OP)
In an attempt to learn something about DataGrid usage, I'm using an OleDbConnection to an Excel, (2003), spreadsheet to retrieve data. Everything works perfectly - except for one column!

CODE

string dtaFile = "d:\\d1\\d2\\s1.xls";
string cmdSQL = "select * from [Sheet 1$] where F16='NP'";
System.Data.OleDb.OleDbConnection cnXL;
System.Data.OleDb.OleDbDataAdapter cmXL;
System.Data.DataSet DtSet;
cnXL = new System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + dtaFile + "';Extended Properties=Excel 8.0;");
cmXL = new System.Data.OleDb.OleDbDataAdapter(cmdSQL, cnXL);
DtSet = new System.Data.DataSet();
cmXL.Fill(DtSet);
cnXL.Close();
cnXL.Dispose(); 

The problem lies in F14. As output by the software that creates the workbook: Row(2) contains a date, Row(3) contains a time, and Row(4) contains "Page: ..". DtSet.GetXml() shows that F14's type is String.

cmdSQL selects data beginning with Row(9); beginning with that row, F14 contains an integer - but the resulting DataGrid shows an empty column for F14!

To test the return values, I created a method to iterate through the rows in the DataSet, and found that F14, (DataRow.ItemArray.GetValue(13).ToString()), was being returned as an empty string.

I have found a work-around, (move any two, or all three, of rows(2..4) to F15), but I don't understand the cause for this situation.

Any enlightenment would be greatly appreciated.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close