Filtering Values In A DataColumn

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1.filtering data view with row filter using boolean value

say i have a dataset called dv

and i have a boolean value i want to filter by "b_DoesWork"

while the column name in the data view that i want to filter on is called 
"Works" how would i filter this since the rowfilter is a string? i tried

dv.rowfilter = "Works = " & b_DoesWork

and get errors back in the IDE that says

Cannot bind to the new value member. Parameter name: value

when I try to set the value of b_DoesWork through a property. what it does 
is sets the b_DoesWork = value when the property is set then updates the row 
filter to be what i stated above... but that error happens... how would you 
go about doing this with a boolean? and technically i will need 5 boolean 
filters on that same row filter in the end... because 5 properties can be 
set boolean wise on this custom control that will be displaying data based 
on the filtered data thanks! 

2.DataColumn.Expression Filter on Child

I have a field in a parent row that needs to be set to the sum of a
field in its children.  That part is easy enough, as follows:

Sum(Child.ColumnName)

However, I need to filter out some of the children rows for the sum.
So what I want is something like this:

Sum(Child.ColumnName) WHERE Child.OtherColumnName = 'Some String'

I get an error which essentially states that there should be an
operand to the right of "Where"

Any ideas?

Kelly Smith

3.DataColumn Select and DataView Filter Expression Problem

I am trying to create a user enterable filter for a 
datagrid that has a little intelligence.  I would like 
the filter to be capable of the following type of matches:

For this application, the datagrid displays a list of 
Parts with PartID as the key.  An example of a PartID is 
12345-B11.  When a user enters a filter value in an 
attempt to reduce the datagrid to similar PartIDs they 
may enter the PartID as 12345B11.  How do I enter an 
DataView.RowFilter(expression) to accomplish this?  The 
obvious expression would be the following (which works 
fine as a SQL Query), but the .NET Framework doesn't 
support the SQL Replace function:

"Replace(PartID, '-', '') LIKE '%XXXXXX%'"

With Query Analyzer, this produces the desired result.  
How do I accomplish this with a DataView?  I would like 
to avoid either 1) Adding a new column to the DataView 
which stores the value = Replace(PartID, '-', '') or 2) 
spin through the DataView copying the desired rows one at 
a time to a new DataTable.

4.How to add a datacolumn which points to another datacolumn

Hi,

I need to add a datacolumn into a datatable which points to another 
datacolumn in another datatable. I have come across this article but 
forget from where.

Anyone help would be very appreciated. Thanks in advance.

5.binding datacolumn to another datacolumn in a datagrid

i have a datatable 'Users' with two columns:
'FriendlyName'
'UserName'

i have a datagrid with two columns that I want to bind with the
'Authors' table:

'FriendlyName' : ComboBox column populated from another datatable with
two columns (DisplayMember = 'Name' which holds a FriendlyName and
ValueMember = 'ID' which holds a UserName)

'UserName' : TextBox column to be populated (readonly) from the 'ID'
(ValueMember') of the currently selected 'FriendlyName'
(DisplayedMember)

The idea is that when you select a friendly name from the ComboBox, the
'Author' table then holds that name in 'FriendlyName' and the
corresponding 'UserName'.

I have the combobox column working and both column in the grid that are
binding, but how do I bind the 'ValueMember' of the current combobox to
the second column which is also bound to the 'UserName' column of the
original 'Authors' table?

6. Datacolumn Value changing method

7. DataColumn's Unique property (applies also to null values?)

8. Get Original-Value of an DataColumn?