You filter data by setting the Filter property to a string expression that returns the desired records.
You sort data by setting the Sort property to the column name you want to sort on; append DESC to sort in descending order, or append ASC to sort in ascending order.
If your application does not use BindingSource components, then you can filter and sort data using DataView objects. For more information, see DataViews (ADO.NET).
Set the Filter property to the expression you want to return. For example, the following code returns customers with a CompanyName that starts with "B":
CustomersBindingSource.Filter = "CompanyName like 'B'"
customersBindingSource.Filter = "CompanyName like 'B'";
Set the Sort property to the column you want to sort on. For example, the following code sorts customers on the CompanyName column in descending order:
CustomersBindingSource.Sort = "CompanyName Desc"
customersBindingSource.Sort = "CompanyName Desc";
You forget important thing
CustomersBindingSource.Filter = "CompanyName like 'B%'"