Get column names from excel file of a specific sheet using c# with OleDbConnection

Question

So far I have managed to get the column names of the whole excel file, but what I would like to do is to get the column names of the excel file of a given table (sheet). How could I modify the code to achieve this. I have been trying for a while now with no positive results, any help much appreciated.

public static List<String> ReadSpecificTableColumns(string filePath, string sheetName)
    {
        var columnList = new List<string>();
        try
        {
            var excelConnection = new OleDbConnection("provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + filePath + "';Extended Properties='Excel 12.0;IMEX=1'");
            excelConnection.Open();
            var columns = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, null);
            excelConnection.Close();

            if (columns != null)
            {
                columnList.AddRange(from DataRow column in columns.Rows select column["Column_name"].ToString());
            }

        }
        catch (Exception exception)
        {
            Console.WriteLine(exception.Message);
        }

        return columnList;
    }

Solution 1

You did not include sheet name in your code.
You can try below code:

var adapter = new OleDbDataAdapter("SELECT * FROM [" +sheetName + "$]", excelConnection);
var ds = new DataSet();
adapter.Fill(ds, "myTable");
DataTable data = ds.Tables["myTable"];

foreach(DataColumn  dc in data.Columns){
...
}

Solution 2

What about using such snippet:

var adapter = new OleDbDataAdapter("SELECT * FROM [" +sheetName + "$A1:Z1]", excelConnection);
var table = new DataTable();
adapter.Fill(table);

For connection string with "HDR=Yes" it will read first row and the destination table will have all columns but no data.