How to send all rows from a datatable to an excel file

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In the following I am unable to send all the rows of datatable 'dttxfile' to an excel file.
Only one row is sent. How to send all rows?

System.Data.DataTable dttxfile = new System.Data.DataTable();
da2.Fill(dttxfile);
DataColumnCollection dcCollection = dttxfile.Columns;
Microsoft.Office.Interop.Excel.ApplicationClass ExcelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
ExcelApp.Application.Workbooks.Add(Type.Missing);
for (int j = 1; j < dttxfile.Columns.Count + 1; j++)
{

ExcelApp.Cells[ii, j] = dcCollection[j-1].ToString();
ExcelApp.Cells[ii + 1, j] = dttxfile.Rows[ii - 1][j - 1].ToString();
}

Posted 7-Feb-14 20:53pm

S.Rajendran from Coimbatore

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Mehdi Gholam · Accepted Answer · 2014-02-07T20:57:00

Solution 1

You need a loop for your rows :

C#

System.Data.DataTable dttxfile = new System.Data.DataTable();
da2.Fill(dttxfile);
DataColumnCollection dcCollection = dttxfile.Columns;
Microsoft.Office.Interop.Excel.ApplicationClass ExcelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
ExcelApp.Application.Workbooks.Add(Type.Missing);
for(int ii=1 ; ii< dttxfile.Rows.Count+1; ii++) // add this line
for (int j = 1; j < dttxfile.Columns.Count + 1; j++)
{
if(ii==1) // add this
ExcelApp.Cells[ii, j] = dcCollection[j-1].ToString();
ExcelApp.Cells[ii + 1, j] = dttxfile.Rows[ii - 1][j - 1].ToString();
}

Posted 7-Feb-14 20:57pm

Mehdi Gholam

Updated 7-Feb-14 21:52pm

v2

Comments

S.Rajendran from Coimbatore 8-Feb-14 3:46am

SqlDataAdapter da2 = new SqlDataAdapter("select Carttxno from txfile where carttxno='" + v_carttxno + "'", sqlCon);
It works but the excel file has the column name 'Carttxno' of the table in all the 3 rows instead of values of the column 'carttxno'.
In my table 'txfile' I have 3 rows with values '341' in all the 3 rows. As per the code the excel file looks like this:
carttxno
carttxno
carttxno
341
Whereas it should look like:
341
341
341

S.Rajendran from Coimbatore 8-Feb-14 3:49am

in the datatable 'dttxfile' the 3 rows are perfect and looks like.
341
341
341

Mehdi Gholam 8-Feb-14 3:52am

See the edited solution.

S.Rajendran from Coimbatore 8-Feb-14 4:21am

Thanks. It works.