EdmFunctions.Substring(DbExpression, DbExpression, DbExpression) Method
Definition
Important
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Creates a DbFunctionExpression that invokes the canonical 'Substring' function with the specified arguments, which must have a string and integer numeric result types. The result type of the expression is string.
public:
[System::Runtime::CompilerServices::Extension]
static System::Data::Common::CommandTrees::DbFunctionExpression ^ Substring(System::Data::Common::CommandTrees::DbExpression ^ stringArgument, System::Data::Common::CommandTrees::DbExpression ^ start, System::Data::Common::CommandTrees::DbExpression ^ length);
public static System.Data.Common.CommandTrees.DbFunctionExpression Substring (this System.Data.Common.CommandTrees.DbExpression stringArgument, System.Data.Common.CommandTrees.DbExpression start, System.Data.Common.CommandTrees.DbExpression length);
static member Substring : System.Data.Common.CommandTrees.DbExpression * System.Data.Common.CommandTrees.DbExpression * System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression
<Extension()>
Public Function Substring (stringArgument As DbExpression, start As DbExpression, length As DbExpression) As DbFunctionExpression
Parameters
- stringArgument
- DbExpression
An expression that specifies the string from which to extract the substring.
- start
- DbExpression
An expression that specifies the starting index from which the substring should be taken.
- length
- DbExpression
An expression that specifies the length of the substring.
Returns
A new DbFunctionExpression that returns the substring of length length
from stringArgument
starting at start
.
Exceptions
stringArgument
, start
, or length
is null
.
stringArgument
, start
, or length
is invalid.
Remarks
Substring requires that the index specified by start be <b>1-based</b>.
Applies to
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