Dataset - Out of memory Exception

I am not sure if this actually is the same issue but i had a similar problem a while ago. I had to use the BindingSource property because the datagridview was not correctly releasing the dataset when I had to update it constantly.
Here is some info on "bindingsource":
http://msdn.microsoft.com/en-us/library/system.windows.forms.bindingsource.aspx

and here is an article from MS explaining how to fix the memory leak problem using a BindingSource:
http://connect.microsoft.com/VisualStudio/feedback/details/92260/datagrid-memory-leak-resulted-from-failed-clear-of-databind

Hi lenordiste,

This is in production and i cannot change the code to use the binding source at this time.
There is a lot of manipulation going in there before i fill the grid.
But these are the 3 steps which i think are causingthis issue.



Whenever i use a myadapter.fill(ds), would the new data be appended  to the dataset or overwrite the existing dataset?
I assumed this would overwrite.

msdn documentation for dataadapter says this:
"You can use the Fill method multiple times on the same DataTable. If a primary key exists, incoming rows are merged with matching rows that already exist. If no primary key exists, incoming rows are appended to the DataTable."




Since i am using the ds = new dataset, what happens to the previous dataset would it be removed or no?



Thanks

Another question:

The page that has the grid will be open atleast 12 hrs a day ata stretch.
Can i dispose the dataset after i populate teh gridview?

Would it cause any issues?

hi gamarrojgg,

Depending on the scope of the dataSet variable, if the variable is declared  inside a method it should be destroyed when the method finished, but if it is declared outside a method it would persist until the CLASS that contains it is detroyed.

i think this answers my question.
This ds and dv are declared public to the class.
I may have to explicitly dispose them or use myadapter.dispose as you mentioned.

I might leave this question open for a while before i close.

Thanks

ok, great, another thing would be your Connection to the Database, are you passing a Connection Object to the Dataadapter? or you are passing the STRING CONNECTION?  because the out of memory exception could happend if you have Connections leaks, so you may check that you are closing/disposing your connections

gamarrojgg,

I should not dispose the dataset and dataview i guess that would erase the data from the gridview.
Connections are not a problem. They are being closed.

Or i have to declare the dataset and dataview locally not at form level.

Right now i am having it like this:
Dim dataSet as dataset
dim dv as dataview

public sub mymethod()
dataSet = New DataSet
 myDataAdapter.Fill(dataSet, "Regulars")
 dv = New DataView(dataSet.Tables("Regulars"))
end sub

well, once your Dataview is assigned to the gridview and the DATABIND method of the gridview is called , you can Dispose you dv object.

It wont affect you grid if you dispose the Dataset and Dataview after that.

Hi
Please Select gamarjogg comment ID:ID: 35160424 as answer.
I selected my comment as answer by mistake.

Thanks.

Thanks