?
Solved

C#  loop through data table rows - skips first row

Posted on 2013-06-30
5
Medium Priority
?
2,497 Views
Last Modified: 2013-07-05
I am creating a datatable to write from an Excel spreadsheet to a csv file.

The code skips the first data row, the column headers. The column headers do not get written to the csv.  Sample spreadsheet attached.

The code:
---------------------------
convertExcelToCSV(@"c:\keys\book2.xls", "Sheet1", @"c:\keys\target.csv")

---------------------------
static void convertExcelToCSV(string sourceFile, string worksheetName, string targetFile)
        {
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + sourceFile + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";

            OleDbConnection conn = null;
            StreamWriter wrtr = null;
            OleDbCommand cmd = null;
            OleDbDataAdapter da = null;
           
            try
            {
                conn = new OleDbConnection(strConn);
                conn.Open();
                cmd = new OleDbCommand("SELECT * FROM [" + worksheetName + "$]", conn);
                cmd.CommandType = CommandType.Text;
                wrtr = new StreamWriter(targetFile);
                da = new OleDbDataAdapter(cmd);
                DataTable dt = new DataTable();
                da.Fill(dt);

                for (int x = 0; x < dt.Rows.Count; x++)
                {
                    string st = dt.Rows[x].ToString();
                    for (int y = 0; y < dt.Columns.Count; y++)
                    {
                        if (y > 0)
                        {
                            rowString += ",";
                        }
                        {
                            rowString += "\"" + dt.Rows[x][y].ToString() + "\"";
                           
                        }
                    }
                    wrtr.WriteLine(rowString);
                }
                MessageBox.Show("Done! Your " + sourceFile + " has been converted into " + targetFile + ".");
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.ToString());
            }

            finally
            {
                if (conn.State == ConnectionState.Open)
                    conn.Close();
                    conn.Dispose();
                    cmd.Dispose();
                    da.Dispose();
                    wrtr.Close();

                wrtr.Dispose();

            }

        }
Book2.xls
0
Comment
Question by:Delta7428
[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
  • 3
  • 2
5 Comments
 
LVL 30

Accepted Solution

by:
anarki_jimbel earned 2000 total points
ID: 39288569
This piece of code prints column names:

            DataTable dt = new DataTable();
            Type typeInt32 = Type.GetType("System.Int32");
            Type typeString = Type.GetType("System.String");
            DataColumn dc1 = new DataColumn("A",typeInt32);
            DataColumn dc2 = new DataColumn("B",typeString);
            DataColumn dc3 = new DataColumn("C", typeString);
            dt.Columns.Add(dc1);
            dt.Columns.Add(dc2);
            dt.Columns.Add(dc3);

            string rowString = "";

            for (int y = 0; y < dt.Columns.Count; y++)
            {
                if (y > 0)
                {
                    rowString += ",";
                }
                rowString += dt.Columns[y].ColumnName;


            }
                System.Diagnostics.Debug.WriteLine(rowString);

Open in new window



Output:
A,B,C

Open in new window

0
 

Author Comment

by:Delta7428
ID: 39288609
Thanks.  I will test your code in the morning.

But thinking ... Maybe the data table wasn't the best way to go here.   Maybe I have a spreadsheet that doesn't have column names and the the first row is a data row, not column names.    A datatable always assumes the first row is column names ... makes sense, but may not be what I need for other spreadsheet formats.

Seems like a lot of hoopla to get that first row.
0
 
LVL 30

Expert Comment

by:anarki_jimbel
ID: 39288679
0
 

Author Comment

by:Delta7428
ID: 39292712
Thanks anarki.  I got pulled off on another assignment.  I will get back to you in a day or 2.
0
 

Author Comment

by:Delta7428
ID: 39300612
I posted a follow up question .. copied and pasted and submitted it by mistake...  Decided to take another look at resolving followup question on my own.  Looks like I can't delete a comment so I wiped it out and replaced it with this.
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

Article by: Ivo
C# And Nullable Types Since 2.0 C# has Nullable(T) Generic Structure. The idea behind is to allow value type objects to have null values just like reference types have. This concerns scenarios where not all data sources have values (like a databa…
This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
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 …
Suggested Courses

762 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