DbExpressionBuilder.Where Method
Creates a new DbFilterExpression that filters the elements in the given input set using the specified predicate.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
public static DbFilterExpression Where( this DbExpression source, Func<DbExpression, DbExpression> predicate )
Parameters
- source
- Type: System.Data.Common.CommandTrees.DbExpression
An expression that specifies the input set.
- predicate
- Type: System.Func<DbExpression, DbExpression>
A method representing the predicate to evaluate for each member of the input set. This method must produce an expression with a Boolean result type that provides the predicate logic.
Return Value
Type: System.Data.Common.CommandTrees.DbFilterExpressionA new DbQuantifierExpression that represents the Any operation.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type DbExpression. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).| Exception | Condition |
|---|---|
| ArgumentNullException | source or predicate is null. |
| ArgumentNullException | The expression produced by predicate is null. |
| ArgumentException | The expression produced by predicate does not have a Boolean result type. |
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
