EdmFunctions.IndexOf Method (DbExpression, DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'IndexOf' function with the specified arguments, which must each have a string result type. The result type of the expression is Edm.Int32.

Namespace:   System.Data.Common.CommandTrees.ExpressionBuilder
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbFunctionExpression IndexOf(
	this DbExpression searchString,
	DbExpression stringToFind
)

Parameters

searchString
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the string to search for stringToFind.

stringToFind
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the string to locate within searchString should be checked.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that returns the first index of stringToFind in searchString.

Exception Condition
ArgumentNullException

searchStringstringToFind

ArgumentException

searchStringstringToFind

The index returned by IndexOf is <b>1-based</b>.

.NET Framework
Available since 4.5
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