1
Answer

Big Data or any other technology for .Net Developers

Photo of Ankur Agarwal

Ankur Agarwal

9y
561
1
Hi Mahesh,
 
I am working on .Net from past 7 years but don't know why not getting the satisfaction in terms of level of work and compensation , would be great if you can suggest me something , should i explore the Big data world and  if yes and what is path for a .Net developer to move to Big data .
 
i will be very thankful to you 

Answers (1)

1
Photo of Amit Gupta
NA 16.5k 25.7k 8y
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
0
Photo of Alex Smith
NA 356 6.8k 8y
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
-1
Photo of ahmed salah
NA 510 30.3k 8y
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
  1. public void CreateSheetIfNotExists()  
  2.        {  
  3.            using (System.Data.OleDb.OleDbConnection databaseConnection = new System.Data.OleDb.OleDbConnection())  
  4.            {  
  5.   
  6.                DataTable schemaTable = default(DataTable);  
  7.   
  8.                databaseConnection.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=D:\\Book310.xlsx;Extended Properties=Excel 12.0;";  
  9.   
  10.                databaseConnection.Open();  
  11.   
  12.                schemaTable = databaseConnection.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] {  
  13.            null,  
  14.            null,  
  15.            "Sheet1$"  
  16.        });  
  17.   
  18.                if (schemaTable.Rows.Count == 0)  
  19.                {  
  20.                    string SQLDDLCommand = "CREATE TABLE [Sheet1] (UserID INTEGER, UserName CHAR(255))";  
  21.                    System.Data.OleDb.OleDbCommand excelCommand = new System.Data.OleDb.OleDbCommand(SQLDDLCommand, databaseConnection);  
  22.                    excelCommand.ExecuteNonQuery();  
  23.                      
  24.                }  
  25.               
  26.                databaseConnection.Close();  
  27.            }  
  28.        }  
after that file 310 created but not open
when open file i get this error