从现有数据集中添加新数据源以用于本地报告？

Question

When using wizard to add a new Data Source to the project, there are 4 options, one goes for Database , one goes for Service , one goes for Object and the last goes for Sharepoint . I'm focusing on Database and Object , these two options are almost the same in how they get data, both of them use SQL query to fetch data, the difference here is Database will get data from a procedure or function stored on the server whereas Object will get data from a method which executes some SQL query remotely. Using two of these options will make me re-create/re-execute my SQL statement to get data, which is very unnecessary because I already have a Dataset filled with data (for displaying in DataGridView), so why the hell do I have to re-execute the exact SQL statement I've executed when filling my Dataset?

To help you image the context more easily, I'll post some code here:

DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter("My SQL SELECT query", mySqlConnection);
da.Fill(ds,"myTable");

Now I want to add ds as a new DataSource for my local report, using wizard doesn't seem able to help, the new DataSource I want here can be created through the exact "My SQL SELECT query" above, that means ds is already what I want, however I don't know how to make it available for my local report's data source.

I hope you understand my problem here, I don't want to do thing which has already been done.

Answer 1

If I understood correctly... You could use an Object method that returns your datasource from your dataset not using SQL if you have the dataset in memory as a dataset. You can use LINQ or the Select() method of a datatable inside your dataset to filter the data.

http://msdn.microsoft.com/en-us/library/det4aw50.aspx

http://msdn.microsoft.com/en-us/library/bb552415.aspx

hope it helps.