IndexOf Method (String)
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Reports the zero-based index of the first occurrence of the specified string in this instance.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function IndexOf ( _
value As String _
) As Integer
public int IndexOf(
string value
)
public:
int IndexOf(
String^ value
)
member IndexOf :
value:string -> int
public function IndexOf(
value : String
) : int
Parameters
- value
Type: System. . :: . .String
The string to seek.
Return Value
Type: System. . :: . .Int32
The zero-based index position of value if that string is found, or -1 if it is not. If value is String..::..Empty, the return value is 0.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | value is null Nothing nullptr unit a null reference (Nothing in Visual Basic) . |
Remarks
Index numbering starts from zero.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see dd66cd4c-b087-415f-9c3e-94e3a1835f74.