Save data to Excel file using Microsoft Excel

Sometimes we need to save data to Excel file using Microsoft Excel. To do that we might need to create the Excel file, need to create table on that with some columns and then save data to the table of Excel file. This is pretty easy enough. Have a look on that.

Save data to Excel table:

private void InsertDataOnExcellTable(string submitttedExcellPath, Test submittedExcellData)
{
    if (!string.IsNullOrEmpty(submitttedExcellPath) && submittedExcellData != null)
    {
        if (!string.IsNullOrEmpty(submittedExcellData.FileName))
        {
            string fullFileName = submitttedExcellPath + Path.DirectorySeparatorChar + 
                                  submittedExcellData.FileName;
            string xlFileExtension = ".xls";
            if (!fullFileName.Contains(xlFileExtension))
            {
                fullFileName = fullFileName + xlFileExtension;
            }
            string connectionString = ConnectionString.GetConStr(fullFileName);
            if (!string.IsNullOrEmpty(connectionString))
            {
                if (this.CreateTableOnExcell(fullFileName, connectionString) == true)
                {
                    lock (new object())
                    {
                        System.Data.OleDb.OleDbConnection myConnection;
                        System.Data.OleDb.OleDbCommand myCommand = new System.Data.OleDb.OleDbCommand();
                        string sql = null;
                        myConnection = new System.Data.OleDb.OleDbConnection(connectionString);
                        myConnection.Open();
                        myCommand.Connection = myConnection;
                        sql = "Insert into [Sheet1$] "
                            + "( "
                            + "[Title],[FirstName],[Surname],[Email],[TelePhoneNumber],[OrderNumber],[SubmissionDate]"
                            + " )"
                            + " values "
                            + "('" + submittedExcellData.Title + "','" 
                            + submittedExcellData.FirstName + "','" 
                            + submittedExcellData.SurName + "','" 
                            + submittedExcellData.Email + "','" 
                            + submittedExcellData.TelePhoneNumber + "','" 
                            + submittedExcellData.OrderNumber + "','" 
                            + submittedExcellData.SubmissionDate + "')";
                        myCommand.CommandText = sql;
                        myCommand.ExecuteNonQuery();
                        myConnection.Close();
                    }
                }
            }
        }
    }
}

Create table on Excell file,

private bool CreateTableOnExcell(string submittedFullPath, string submittedConnStr)
{
    if (!string.IsNullOrEmpty(submittedConnStr) && !string.IsNullOrEmpty(submittedFullPath))
    {
        if (this.CreateExcellFile(submittedFullPath))
        {
            lock (new object())
            {
                OleDbConnection connExcel = new OleDbConnection(submittedConnStr);
                OleDbCommand cmdExcel = new OleDbCommand();
                cmdExcel.Connection = connExcel;
                System.Data.DataTable excelSchema = null;
                try
                {
                    ////Check if the Sheet Exists
                    connExcel.Open();
                    excelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                }
                catch
                {
                }
                finally
                {
                    connExcel.Close();
                }
                DataRow[] dr = excelSchema != null ? 
                  excelSchema.Select("TABLE_NAME = 'Sheet1'") : null;
                ////if not Create the Sheet
                if (dr == null || dr.Length == 0)
                {
                    string excelCommand = "CREATE TABLE";
                    string sheetName = "[Sheet1]";
                    ////All Column Name
                    StringBuilder tableColumn = new StringBuilder();
                    tableColumn.Append("(");
                    tableColumn.Append("Title varchar(20)");
                    tableColumn.Append(",");
                    tableColumn.Append("FirstName varchar(20)");
                    tableColumn.Append(",");
                    tableColumn.Append("Surname varchar(20)");
                    tableColumn.Append(",");
                    tableColumn.Append("Email varchar(20)");
                    tableColumn.Append(",");
                    tableColumn.Append("TelePhoneNumber varchar(20)");
                    tableColumn.Append(",");
                    tableColumn.Append("OrderNumber varchar(20)");
                    tableColumn.Append(",");
                    tableColumn.Append("SubmissionDate varchar(20)");
                    tableColumn.Append(")");
                    tableColumn.Append(";");
                    StringBuilder exelQuery = new StringBuilder();
                    exelQuery.Append(excelCommand);
                    exelQuery.Append(" ");
                    exelQuery.Append(sheetName);
                    exelQuery.Append(" ");
                    exelQuery.Append(tableColumn.ToString());
                    if (cmdExcel != null)
                    {
                        cmdExcel.CommandText = exelQuery.ToString();
                        connExcel.Open();
                        cmdExcel.ExecuteNonQuery();
                        connExcel.Close();
                    }
                }
            }
            return true;
        }
    }
    return false;
}

Create Excel file:

private bool CreateExcellFile(string submittedFullPath)
{
    if (!string.IsNullOrEmpty(submittedFullPath))
    {
        lock (new object())
        {
            if (!File.Exists(submittedFullPath))
            {
                ////Ex = Microsoft.Office.Interop.Excel;
                Ex.Application exelApp = null;
                Ex.Workbook exelWorkBook = null;
                Ex.Worksheet exelWorkSheet = null;
                object misValue = System.Reflection.Missing.Value;
                try
                {
                    ////Create an Excell Application
                    exelApp = new Ex.ApplicationClass();
                    if (exelApp != null)
                    {
                        if (exelApp.Workbooks != null)
                        {
                            ////Add an Workbook to the current Excell Application
                            exelWorkBook = exelApp.Workbooks.Add(misValue);
                        }
                    }
                    if (exelWorkBook != null)
                    {
                        ////Getting Sheet1
                        exelWorkSheet = (Ex.Worksheet)exelWorkBook.Worksheets.get_Item(1);
                        if (exelWorkSheet != null)
                        {
                            //// Naming the Table Data Column
                            exelWorkSheet.Cells[1, 1] = "Title";
                            exelWorkSheet.Cells[1, 2] = "FirstName";
                            exelWorkSheet.Cells[1, 3] = "Surname";
                            exelWorkSheet.Cells[1, 4] = "Email";
                            exelWorkSheet.Cells[1, 5] = "TelePhoneNumber";
                            exelWorkSheet.Cells[1, 6] = "OrderNumber";
                            exelWorkSheet.Cells[1, 7] = "SubmissionDate";
                        }
                        ////Save the Excell file to its Specified location
                        exelWorkBook.SaveAs(submittedFullPath, Ex.XlFileFormat.xlWorkbookNormal, 
                          misValue, misValue, misValue, misValue, 
                          Ex.XlSaveAsAccessMode.xlExclusive, misValue, 
                          misValue, misValue, misValue, misValue);
                    }
                }
                catch
                {
                }
                finally
                {
                    if (exelWorkBook != null)
                    {
                        exelWorkBook.Close(true, misValue, misValue);
                    }
                    if (exelApp != null)
                    {
                        exelApp.Quit();
                    }
                }
                this.ReleaseObject(exelWorkSheet);
                this.ReleaseObject(exelWorkBook);
                this.ReleaseObject(exelApp);
            }
            return true;
        }
    }
    return false;
}

Release the Object by force,

private void ReleaseObject(object submittedObj)
{
    try
    {
        //// By force realeasing the Object if the Garbage Collector not doing it right now
        System.Runtime.InteropServices.Marshal.ReleaseComObject(submittedObj);
        submittedObj = null;
    }
    catch
    {
        submittedObj = null;
    }
    finally
    {
        GC.Collect();
    }
}

And then the Connection String,

public static string GetConStr(string submittedPath)
{
    string connectionString = string.Empty;
    if (!string.IsNullOrEmpty(submittedPath))
    {
        connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + 
           submittedPath + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=0\"";
    }
    return connectionString;
}