Excel not inserting leading zero

问题

I am using Office OpenXml to write to an Excel file. The file is a template so it already has all my headers and formatting for my columns. I am inserting numbers that have leading zeroes to a "special" column which is basically a 10 digit number. However in my code I can see that it is setting the value to for example 0000000004. The result in the sheet with a value of 4 in that cell and the actual cell showing 0000000004.

Here is my code to write to the cell.

  if (reader[2].ToString().Length < 9)
  {


        myworksheet.Cell(firstrow, 12).Value = reader[2].ToString(); //0045678945

  }
  else
  {
        myworksheet.Cell(firstrow, 12).Value = reader[2].ToString().Substring(0, 9); //0045678945

  }

when I open the excel sheet like I stated above my value is 45678945 instead of 0045678945

Any help would be appreciated.

回答1:

If I understand correctly:

Excel shows numbers with leading zeroes, reading them from C# via OOXML you don't see the leading zeroes.

Chances are Excel is setting some formatting rules instead of storing the actual leading zeroes.

Several ways to counteract that. Here are the "cheapest" ones that come to mind, pick one:

format the column in Excel as text
in C# code don't expect the leading zeroes and instead add them

回答2:

The easiest way to get the result you want is to prepend an apostrophe to the value you put in the cell - this tells Excel it is a string:

Cell.Value= "'" & "000123"

Will show up as 000123

Here is a bit of code to show how things work (at least how they work for me, in Excel 2010):

Sub testFormat()
[A1].Value = "000123"
[A2].Value = "'000123"
[A3].Value = "000123"
[A3].NumberFormat = "@"
[A4].Value = "'000123"
[A4].NumberFormat = "@"
End Sub

The result of this is as follows:

As you can see, there are three cells that show the leading zeros:

A cell into which I entered the string with an apostrophe in front
A cell that was formatted with the "@" (="text") format
A cell that had the apostrophe AND the text formatting

I'm not sure what you did to make the apostrophe appear in your spreadsheet... But I'm hoping the above will inspire you to solve your problem.

回答3:

In order to get leading zeros to not be truncated from within Excel you need to set the number format for the cells to Text.

回答4:

I believe if you set the cell's DataType to either a String or SharedString the leading 0's will be preserved. Excel will see this as text and just treat the value literally and not try to apply any formatting rules.

cell.DataType = new EnumValue<CellValues>( CellValues.SharedString );

OR cell.DataType = new EnumValue( CellValues.String );

回答5:

If you are using a DataTable you need to Take another DataTable and then you need to iterate through entire cells in the datatable and prepend the cells text with space i.e with '&nbsp';.We cannot modify the rows in the same table because it will throw an exception saying "Collection was Modified".We have to take a new datatable.

Consider the following code.

    //To get the result with leading zero's in excel this code is written.
    DataTable dtUpdated=new DataTable();
    //This gives similar schema to the new datatable
    dtUpdated = dtReports.Clone();
        foreach (DataRow row in dtReports.Rows)
        {
            for (int i = 0; i < dtReports.Columns.Count; i++)
            {
                string oldVal = row[i].ToString();
                string newVal = "&nbsp;"+oldVal;
                row[i] = newVal;
            }
            dtUpdated.ImportRow(row); 
        }

We can bind this updated table to datagrid so that it can be useful for Excel Conversion.

来源：https://stackoverflow.com/questions/15143753/excel-not-inserting-leading-zero

标签

openxml

openxml-sdk

spreadsheetml