C# get column name from excel with interop

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Hi everyone,

I'm working with Excel files on this days.

I need to insert a column beetween some others.

I'm using this code and it's works fine.

Excel.Range araAt = raporWrkS.Range["K1"];
                                            araAt.EntireColumn.Insert(Excel.XlInsertShiftDirection.xlShiftToRight,
                    Excel.XlInsertFormatOrigin.xlFormatFromRightOrBelow);

On this code i wrote K1 just for sample. And works in a if loop.
I'm starting from the first column and going to right with every new data. But sometimes i need to insert a new column beetween this columns.And using this code than.

But how can i write column name automatically. For example if new row must to be added on F1 than K1 must be F1. So i need to get column name from that. But i can't get column name. Looked lot of documents on internet but all of them has NUMERICAL column name.

Could you show me a way, about how can i get the column name ?

Thank you.

What I have tried:

Looked the internet for ColumnName property or something like that.

Posted 21-Jun-17 9:55am

kozmikadam

Updated 21-Jun-17 22:04pm

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kozmikadam 22-Jun-17 4:02am

I solved my problem. Get column count ( i get with for loop ) and then i convert it to alphabetical version.

private string GetExcelColumnName(int columnNumber)
{
int dividend = columnNumber;
string columnName = String.Empty;
int modulo;

while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
dividend = (int)((dividend - modulo) / 26);
}

return columnName;
}

3 solutions

Solution 4

I wonder why you are using those coordinates which is a GUI thing for users ?
Why don't you tell your program to use directly the column number ?

C#

    Excel.Range araAt = raporWrkS.cells(columnNumber,1);
    araAt.EntireColumn.Insert(Excel.XlInsertShiftDirection.xlShiftToRight,
Excel.XlInsertFormatOrigin.xlFormatFromRightOrBelow);

Posted 22-Jun-17 7:46am

Patrice T

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kozmikadam 23-Jun-17 2:42am

Hi, accually i looked like an answer like this one. And couldn't find. I will try this suggestion today. Thank you.

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kozmikadam · Accepted Answer · 2017-06-21T22:04:00

Here is the solution.

First of all i get column count with a for loop. I count every column in this loop. Already have this loop also.

And then convert the count of column to alphabetical version with this code.

private string GetExcelColumnName(int columnNumber)
{
    int dividend = columnNumber;
    string columnName = String.Empty;
    int modulo;

    while (dividend > 0)
    {
        modulo = (dividend - 1) % 26;
        columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
        dividend = (int)((dividend - modulo) / 26);
    } 

    return columnName;
}

Bhola Ram Sahu · Accepted Answer · 2017-06-21T20:30:00

You can get column name from the bellow code. Then you can put new column name.

Excel.Application xlApp = new Excel.Application();
    Excel.Workbook xlWorkbook = xlApp.Workbooks.Open("workbookname");
    Excel.Worksheet xlWorksheet = xlWorkbook.Sheets[1]; // assume it is the first sheet
    int columnCount = xlWorksheet.UsedRange.Columns.Count;
    List<string> columnNames = new List<string>();
    for (int c = 1; c < columnCount; c++)
    {
        if (xlWorksheet.Cells[1, c].Value2 != null)
        {
            string columnName = xlWorksheet.Columns[c].Address;
            Regex reg = new Regex(@"(\$)(\w*):");
            if (reg.IsMatch(columnName))
            {
                Match match = reg.Match(columnName);
                columnNames.Add(match.Groups[2].Value);
            }
       }
    }

C# get column name from excel with interop

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