Strings.Mid Method

Returns a string that contains characters from a specified string.

Syntax

Public Shared Function Mid (
str As String,
Start As Integer,
Length As Integer) As String

Parameters

str

Type: System.String Required. String expression from which characters are returned.

Start

Type: System.Int32 Required. Integer expression. Starting position of the characters to return. If Start is greater than the number of characters in str, the Mid function returns a zero-length string (""). Start is one based.

Length

Type: System.Int32 Optional. Integer expression. Number of characters to return. If omitted or if there are fewer than Length characters in the text (including the character at position Start), all characters from the start position to the end of the string are returned. Return Value Type: System.String A string that consists of the specified number of characters starting from the specified position in the string.

Return Value

Type: System.String A string that consists of the specified number of characters starting from the specified position in the string.

Visual Basic has a Mid function and a Mid statement. These elements both operate on a specified number of characters in a string, but the Mid function returns the characters while the Mid statement replaces the characters. For more information, see Mid Statement.

Exceptions

Exception Condition ArgumentException Start <= 0 or Length < 0.

Remarks

To determine the number of characters in str, use the Len function. Visual Basic has a Mid function and a Mid statement. These elements both operate on a specified number of characters in a string, but the Mid function returns the characters while the Mid statement replaces the characters. For more information, see Mid Statement. System_CAPS_note

Note

The MidB function in previous versions of Visual Basic returns a string in bytes rather than characters. It is used primarily for converting strings in double-byte character set (DBCS) applications. All Visual Basic strings are in Unicode, and MidB is no longer supported.