Reading an Excel File From C#

Question

I have a connection string to read an excel file from my C# project that looks like this..

String ConnectionString  = \"Provider=Microsoft.ACE.OLEDB.12.0;\"          


        

Answer 1

Following Code will Read the Excel file & Fill DataTable with its data

try
            {
                string connectionString = string.Empty;

                if (Path.GetExtension(ExcelFileName) == ".xlsx")
                {
                    connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ExcelFileName +
                        ";Extended Properties=Excel 12.0;";
                }
                else
                {
                    connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFileName + ";Extended Properties=Excel 8.0;";
                }

                OleDbCommand selectCommand = new OleDbCommand();
                OleDbConnection connection = new OleDbConnection();
                OleDbDataAdapter adapter = new OleDbDataAdapter();
                connection.ConnectionString = connectionString;

                if (connection.State != ConnectionState.Open)
                    connection.Open();

                DataTable dtSchema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

                List SheetsName = GetSheetsName(dtSchema);
                for (int i = 0; i < SheetsName.Count; i++)
                {
                    selectCommand.CommandText = "SELECT * FROM [" + SheetsName[i] + "]";
                    selectCommand.Connection = connection;
                    adapter.SelectCommand = selectCommand;
                    DataTable Sheet = new DataTable();
                    Sheet.TableName = SheetsName[i].Replace("$", "").Replace("'", "");
                    adapter.Fill(Sheet);

                    if (Sheet.Rows.Count > 0)
                    {
                        Records.Tables.Add(Sheet);                        
                    }
                }
            }
            catch (Exception ex)
            {
                WriteLog(ex);
            }