EdmFunctions.Left Method
Creates a DbFunctionExpression that invokes the canonical 'Left' function with the specified arguments, which must have a string and integer numeric result type. The result type of the expression is string.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
public static DbFunctionExpression Left( this DbExpression stringArgument, DbExpression length )
Parameters
- stringArgument
- Type: System.Data.Common.CommandTrees.DbExpression
An expression that specifies the string from which to extract the leftmost substring.
- length
- Type: System.Data.Common.CommandTrees.DbExpression
An expression that specifies the length of the leftmost substring to extract from stringArgument.
Return Value
Type: System.Data.Common.CommandTrees.DbFunctionExpressionA new DbFunctionExpression that returns the the leftmost substring of length length from stringArgument.
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 | stringArgumentlength |
| ArgumentException | stringArgument |
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.
