c# - C# DataTable.Select() - How do I format the filter criteria to include null?

Question

This doesn't work

DataTable myNewTable = myDataTable.Select("Name <> 'n/a'").CopyToDataTable();

myDataTable has a row named Name. I would like to select the rows from this table where Name is not equal to "n/a". It selects but still am missing the null values i need the null values too.

Can anyone help?

Answer 1

Try this

myDataTable.Select("[Name] is NULL OR [Name] <> 'n/a'" )

Edit: Relevant sources:

• DataTable.Select Method (String)
• Expression filtering syntax

Answer 2

Try out Following:

DataRow rows = DataTable.Select("[Name]<>'n/a'")

For Null check in This:

DataRow rows =  DataTable.Select("[Name] <> 'n/a' OR [Name] is NULL" )

Answer 3

The way to check for null is to check for it:

DataRow[] myResultSet = myDataTable.Select("[COLUMN NAME] is null");

You can use and and or in the Select statement.

Answer 4

try this:

var result = from r in myDataTable.AsEnumerable()  
            where r.Field<string>("Name") != "n/a" &&  
                  r.Field<string>("Name") != "" select r;  
DataTable dtResult = result.CopyToDataTable();