How to create excel file using c# windows form

Question

I try to create excel file using c# windows form visual studio 2015

i need to create excel file with excel 2007 with extension xlsx

after i click the button and got to path i need to create i not found file found in path

so that what is wrong in code bellow :

public Boolean AddExcelRow2007(String strFilePath)
       {
           if (!File.Exists(strFilePath)) return false;
           string strExcelConn = "Provider = Microsoft.ACE.OLEDB.12.0;" +
   "Data Source =" +strFilePath + "; Excel 12.0; HDR = YES;";
           OleDbConnection connExcel = new OleDbConnection(strExcelConn);
           OleDbCommand cmdExcel = new OleDbCommand();
           try
           {
               cmdExcel.Connection = connExcel;

               //Check if the Sheet Exists
               connExcel.Open();
               DataTable dtExcelSchema;
               dtExcelSchema =
               connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
               connExcel.Close();
               DataRow[] dr =
         dtExcelSchema.Select("TABLE_NAME = 'tblData'");

       //if not Create the Sheet
               if (dr == null || dr.Length == 0)
               {
                   cmdExcel.CommandText = "CREATE TABLE[tblData]" +
           " (ID varchar(10), Name varchar(50));";
                   connExcel.Open();
                   cmdExcel.ExecuteNonQuery();
                   connExcel.Close();
               }

               //Add New Row to Excel File
               cmdExcel.CommandText = "INSERT INTO[tblData]" + "(ID, Name) values('0', 'Start')";


               connExcel.Open();
               cmdExcel.ExecuteNonQuery();
               connExcel.Close();
               return true;
           }
           catch
           {
               return false;
           }
           finally
           {
               cmdExcel.Dispose();
               connExcel.Dispose();
           }
       }

and after that i call

private void button6_Click_1(object sender, EventArgs e)
       {

          AddExcelRow2007("D:\\Book300.xlsx");
       }

But excel file not created

so that what is wrong in code above 

Answer 1

Hey Ahmed,

Please review your code and question, as you are asking 'excel file was not created' and in your code, you are returning false, if file doesnot exists

 

if (!File.Exists(strFilePath)) return false;

 

Please check the below link for your reference: 

 http://csharp.net-informations.com/excel/csharp-create-excel.htm

Answer 2

Hi, check this link for generating Excel from database.

 

https://www.e-iceblue.com/Tutorials/Spire.XLS/Spire.XLS-Program-Guide/Data-Export-/Import-Export-Datatable-to-Excel-from-Database.html

Answer 3

my problem only in creating excel so that i try with another way 

in the code here excel file  created but not open so that can you tell me why not open after created

my code as bellow

public void CreateSheetIfNotExists()
       {
           using (System.Data.OleDb.OleDbConnection databaseConnection = new System.Data.OleDb.OleDbConnection())
           {

               DataTable schemaTable = default(DataTable);

               databaseConnection.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=D:\\Book310.xlsx;Extended Properties=Excel 12.0;";

               databaseConnection.Open();

               schemaTable = databaseConnection.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] {
           null,
           null,
           "Sheet1$"
       });

               if (schemaTable.Rows.Count == 0)
               {
                   string SQLDDLCommand = "CREATE TABLE [Sheet1] (UserID INTEGER, UserName CHAR(255))";
                   System.Data.OleDb.OleDbCommand excelCommand = new System.Data.OleDb.OleDbCommand(SQLDDLCommand, databaseConnection);
                   excelCommand.ExecuteNonQuery();

               }

               databaseConnection.Close();
           }
       }

after that file 310 created but not open

when open file i get this error