datarow

问题 Is there a reason why I can\'t do the following: foreach (var Item in DataTable.Rows) { rather than having to do foreach (DataRow Item in DataTable.Rows) { I would have thought this was possible, like it is on other datatypes. For example: foreach (var Employee in Staff) { // string[] Staff etc... When I try the first foreach loop, I get the the error CS0021: Cannot apply indexing with [] to an expression of type \'object\' . Why can\'t the compiler figure out that .Rows returns a collections

问题 I\'m looking for a simple way to make a clone of a DataRow. Kind of like taking a snapshot of that Row and saving it. The values of original Row are then free to change but we still have another saved copy which doesn\'t change. Is this the correct way to do it? DataRow Source, Destination; //Assume we create some columns and fill them with values Destination.ItemArray = Source.ItemArray; Will this just set Snapshot\'s ItemArray reference to point to the one in Source or does it actually make

问题 I can\'t seem to get an answer all together for my real issue Invalid parameter when retrieving image from DB So Imma try piece by piece. Working with Visual Studio 2012 in C# and MS Access 2010. My solution is an app non-web related. I\'m not sure about this part so here my question is on how to correctly get the image of an OLE Object that is in a row from a query into a byte array ( byte[] ), because certainly it isn\'t how I\'m doing it with the following code. The row I\'m talking about