Articolo
11/18/2011

Strings.Mid Method (String, Int32, Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Returns a string containing a specified number of characters from a string.

Namespace: Microsoft.VisualBasic
Assembly: Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

Syntax

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

public static string Mid(
    string str,
    int Start,
    int Length
)

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
Returns a string containing a specified number of characters from a string.

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.

Examples

This example uses the Mid function to return a specified number of characters from a string.

' Creates text string.
Dim TestString As String = "Mid Function Demo"
' Returns "Mid".
Dim FirstWord As String = Mid(TestString, 1, 3)
' Returns "Demo".
Dim LastWord As String = Mid(TestString, 14, 4)
' Returns "Function Demo".
Dim MidWords As String = Mid(TestString, 5)

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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