Question

We are pulling a huge data from sql server DB. It has around 25000 rows with 2500 columns. The requirement is to read the data and export it to spread sheet, so pagination is not a choice. When the records are less it is able to pull the data but when it grows to the size i mentioned above it is throwing exception.

public DataSet Exportexcel(string Username)
{
    Database db = DatabaseFactory.CreateDatabase(Config);
    DbCommand dbCommand = 
        db.GetStoredProcCommand("Sp_ExportADExcel");
    db.AddInParameter(dbCommand, "@Username", DbType.String, 
        Username);
    return db.ExecuteDataSet(dbCommand);
}

Please help me in resolving this issue.

Answer 1

The requirement is to read the data and export it to spread sheet, so
pagination is not a choice.

Why not read data in steps. Instead of getting all records at once why not get limited number of records every time and write them to excel. Continue until you have processed all the records