System.OutOfMemoryException While loading data from dataset to Excel

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Hello

I am trying to load data from dataset to excel sheet like this

C#

Excel.ExcelPackage app = new Excel.ExcelPackage();
app.Workbook.Worksheets.Add("Sheet1").Cells["A1"].LoadFromDataTable(uploadDS.Tables[0], true);

Here iam getting error like System.outofmemory exception.

I am uploading to dataset like this:

C#

SqlDataAdapter uploadDA = new SqlDataAdapter(query, uploadCon);
 DataSet uploadDS = new DataSet("UploadDataset");
uploadDA.Fill(uploadDS);

Thanks for any help.

Posted 26-Nov-13 3:27am

njdcjk

Updated 26-Nov-13 3:34am

RaisKazi

v2

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Comments

Ron Beyer 26-Nov-13 9:33am

So what line do you get the out of memory exception on?

njdcjk 26-Nov-13 9:37am

app.Workbook.Worksheets.Add("Sheet1").Cells["A1"].LoadFromDataTable(uploadDS.Tables[0], true);

Adam Zgagacz 26-Nov-13 9:40am

Most likely query to the database is producing more than memory can handle. Can you investigate first what your query produces?

thatraja 26-Nov-13 10:13am

How many rows & columns?

Herman<T>.Instance 26-Nov-13 10:22am

are you using EPPLUS? Write to a FILEstream in stead of a Memorystream

njdcjk 27-Nov-13 2:35am

Iam having 60 columns and 20k rows

2 solutions

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Dave Kreskowiak · Answer 1 · 2013-11-26T04:23:00

Solution 1

How many rows and columns are you trying to stuff into Excel?? Excel cannot hold an infinite amount of data. You probably really are running the machine out of memory or you're Exceeding the amount of data that Excel can hold in a single sheet/workbook.

Posted 26-Nov-13 4:23am

Dave Kreskowiak

Comments

njdcjk 26-Nov-13 23:49pm

Iam jst using 20k records

Dave Kreskowiak 27-Nov-13 7:53am

OK, now how much data is in each row?? You have to figure out what the worst possible case is for each row and multiply that by the number of records.

thatraja · Answer 2 · 2013-11-26T04:24:00

Solution 2

In past I have answered similar question, check it out.
best way to use .net Datatable with a huge data[^]
Also check this for excel limitations
Exporting to Microsoft Excel[^]

Posted 26-Nov-13 4:24am

thatraja