Formatting columns in Excel

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Hey guys, Im stuck on a really small problem. Ihave an application that once completed writes the results out to an excel file. I want to format the excle file. i.e colours and fonts but im having no luck. code below,

C#

public void WriteOutToExcel(System.Data.DataTable objDataTable, string csFileName)
       {

           Microsoft.Office.Interop.Excel.Application xlApp;
           Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
           Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
           object misValue = System.Reflection.Missing.Value;
           int iRowCount = 0;
           int iColumnCount = 0;

           string filename = String.Format("{0:yyyy-MM-dd}__{1}", DateTime.Now, csFileName);
           string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), filename);

           xlApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
           xlWorkBook = xlApp.Workbooks.Add(misValue);

           xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

           //Created the Header columns
           iRowCount += 1;
           for (int i = 0; i < objDataTable.Columns.Count; i++)
           {
               iColumnCount += 1;
               xlApp.Cells[iRowCount, iColumnCount] = objDataTable.Columns[i].ColumnName;

           }

           // loop through the datatable and insert all the results
           foreach (DataRow row in objDataTable.Rows)
           {
               iRowCount += 1;
               iColumnCount = 0;
               object[] array = row.ItemArray;
               for (int i = 0; i < array.Length ; i++)
               {
                   iColumnCount += 1;
                   xlApp.Cells[iRowCount, iColumnCount] = array[i].ToString();
               }

           }

           //Save the file.
           xlWorkBook.SaveAs(path, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
           xlWorkBook.Close(true, misValue, misValue);
           xlApp.Quit();

           //Finally destroy all the objects.
           if (xlApp != null)
               Marshal.ReleaseComObject(xlApp);
           if (xlWorkBook != null)
               Marshal.ReleaseComObject(xlWorkBook);
           if (xlWorkSheet != null)
               Marshal.ReleaseComObject(xlWorkSheet);

       }

Any help is greatly apreciated thanks.

Posted 20-Apr-12 4:38am

frostcox

Updated 20-Apr-12 4:44am

Sandeep Mewara

v2

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Sandeep Mewara 20-Apr-12 10:45am

Always wrap your code in PRE tag for better readability.

2 solutions

Solution 2

To add style, select the range to which to apply a style, and set the appropriate properties. I don't have a dev environment in from of me, so this'll be a bit off, but for example, something like this would set your first three column headers to bold

C#

xlWorkSheet.Range("A0:C0").Font.Bold = True;

For other things, you should explore the Excel enums in your interop and use those in assigning values (most start with xl, so you can find them in intellisense).

Posted 20-Apr-12 5:37am

woopsydoozy

Comments

frostcox 20-Apr-12 12:13pm

Nice one thanks for your help.

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Maciej Los · Accepted Answer · 2012-04-20T05:32:00

I don't know where is the problem...

You need to know Microsoft Excel Objects[^], especially: borders, font, interior.

In VB:

VB

xlRange = xlWorkSheet.Range("A1:A5")
'borders
xlRange.Borders.LineStyle = xlDouble
xlRange.Borders(xlEdgeBottom).Color = vbRed
'font
xlRange.Font.Bold = True
'interior
xlRange.Interior.ColorIndex = vbYellow

And a little tip:
Copying data from recordset, try to use MS Excel method for Worksheet:

VB

xlWorksheet.Range("A1").CopyFromRecordset (objRecordset)

It's much, much quickest then copying it in the for ... to... next loop.

That's all!