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When I export the contents of a datatable to excel, the leading 0s of the
first column are truncated. Is there a way to keep this from happening?
Updated 14-Jan-14 21:48pm
Karthik_Mahalingam 15-Jan-14 3:44am    
post your code

While exporting to excel, adding "\t" before the value being inserted
for example:
string test = "000456";
string insertValueAs = "\t" + test;

the string test would then be considered as a string value and not an integer value. Thus, it would retain the leading zeros.
Let me know if it helps or not.
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ars88 5-Apr-14 1:31am    
Thnx. It works great
The best you could do is to convert the column format to Text
That can be done by

In the following I am converting the format of the C1 column to Text
range["C1"].Value="00129";/*Then you have to specify the value*/  

the above will give the exact value you assigned to the column.

You can also look at the other formats like Pincode, Creditcard number format in the following[^]
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The best way to do it is to format the column as a number, with the appropriate number of leading zeros - that way you can still use it as a numeric value.
This creates a new file, with the first column formatted to show two digits, with a leading zero:
Excel.Application excel = new Excel.Application();
excel.Visible = true;
Excel.Workbook wb = excel.Workbooks.Add(1);
Excel.Worksheet ws = (Excel.Worksheet) wb.Sheets[1];
ws.Cells[1, 1].EntireColumn.NumberFormat = "00";
But you can open an existing file instead and apply the formatting in exactly the same way.
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Shivam Sharma 25-Aug-20 13:23pm    
Excel.Application is using which library references ?
OriginalGriff 25-Aug-20 16:32pm    
It's a lot, lot quicker to look at the documentation:
Excel.Range formatRange;
formatRange = xlWorkSheet.get_Range("a1", "b1");
formatRange.NumberFormat = "@";
xlWorkSheet.Cells[1, 1] = "098";

Full Source : C# Excel Formatting

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