I'm using Desformat=Spreadsheet in Reports Builder 10.1.2.02
One of the columns I'm displaying is a number with leading zeros. In the database view it is a VARCHAR2(10) column. I want to preserve the leading zeros.
In the html output file created by Desformat=Spreadsheet, the leading zeros are included. This is one example of the column from a row in which the value (0002800773) has leading zeros:
<TD ALIGN="right" DIR="LTR"><SPAN STYLE="FONT-SIZE: 8pt; FONT-FAMILY: arial; COLOR: #000000; FONT-STYLE: normal; FONT-WEIGHT: 400">0002800773</SPAN></TD>
But when I open it in Excel, the leading zeros are removed. I think it is because the number format defaults to "General":

If I create a csv file, the columns also default to "General". Instead of letting it default, if I open Excel and click on Data >> From Text, the Text Import Wizard opens and I'm able to change the default format from General to Text for all columns. When I do this, the leading zeros are displayed in the spreadsheet.

However, I want to generate the spreadsheet automatically and email it to certain users. I don't want to have to generate it manually (using Data >> From Text).
In Reports Builder, is there a way to get Excel to use a Column format of Text?