IndexOf Method (String, Int32)

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Reports the zero-based index of the first occurrence of the specified string in this instance. The search starts at a specified character position.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public int IndexOf(
	string value,
	int startIndex
)

Parameters

value
Type: System..::..String
The string to seek.
startIndex
Type: System..::..Int32
The search starting position.

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 startIndex.

Index numbering starts from 0. The startIndex parameter can range from 0 to the length of the string instance. If startIndex equals the length of the string instance, the method returns -1.

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