public static int InStr (int StartPos, string? String1, string? String2, Microsoft.VisualBasic.CompareMethod Compare = Microsoft.VisualBasic.CompareMethod.Binary);
public static int InStr (int Start, string? String1, string? String2, Microsoft.VisualBasic.CompareMethod Compare = Microsoft.VisualBasic.CompareMethod.Binary);
public static int InStr (int StartPos, string String1, string String2, Microsoft.VisualBasic.CompareMethod Compare = Microsoft.VisualBasic.CompareMethod.Binary);
public static int InStr (int Start, string String1, string String2, Microsoft.VisualBasic.CompareMethod Compare = Microsoft.VisualBasic.CompareMethod.Binary);
static member InStr : int * string * string * Microsoft.VisualBasic.CompareMethod -> int
static member InStr : int * string * string * Microsoft.VisualBasic.CompareMethod -> int
Public Function InStr (StartPos As Integer, String1 As String, String2 As String, Optional Compare As CompareMethod = Microsoft.VisualBasic.CompareMethod.Binary) As Integer
Public Function InStr (Start As Integer, String1 As String, String2 As String, Optional Compare As CompareMethod = Microsoft.VisualBasic.CompareMethod.Binary) As Integer
本例使用
InStr
函数返回一个字符串在另一个字符串中的第一个匹配项的位置。
' String to search in.
Dim searchString As String = "XXpXXpXXPXXP"
' Search for "P".
Dim searchChar As String = "P"
Dim testPos As Integer
' A textual comparison starting at position 4. Returns 6.
testPos = InStr(4, searchString, searchChar, CompareMethod.Text)
' A binary comparison starting at position 1. Returns 9.
testPos = InStr(1, SearchString, SearchChar, CompareMethod.Binary)
' If Option Compare is not set, or set to Binary, return 9.
' If Option Compare is set to Text, returns 3.
testPos = InStr(searchString, searchChar)
' Returns 0.
testPos = InStr(1, searchString, "W")
通常， InStr 函数在分析字符串时使用。
InStrB以前版本的 Visual Basic 中的 函数返回字节数，而不是字符位置。 它主要用于转换双字节字符集 (DBCS) 应用程序中的字符串。 所有 Visual Basic 2005 字符串都在 Unicode 中， InStrB 不再受支持。
Compare 参数的设置是：
返回的常量
Value
InStrRev(String, String, Int32, CompareMethod)
StrComp(String, String, CompareMethod)
ArgumentException
字符串 (Visual Basic)
字符串介绍 (Visual Basic)
Option Compare 语句
public static int InStr (string? String1, string? String2, Microsoft.VisualBasic.CompareMethod Compare = Microsoft.VisualBasic.CompareMethod.Binary);
public static int InStr (string String1, string String2, Microsoft.VisualBasic.CompareMethod Compare = Microsoft.VisualBasic.CompareMethod.Binary);
static member InStr : string * string * Microsoft.VisualBasic.CompareMethod -> int
Public Function InStr (String1 As String, String2 As String, Optional Compare As CompareMethod = Microsoft.VisualBasic.CompareMethod.Binary) As Integer
本例使用 InStr 函数返回一个字符串在另一个字符串中的第一个匹配项的位置。 在第一个示例中，搜索从第四个字符开始，并返回下一个小写“p”，因为 CompareMethod 是 Text ，因此不区分大小写。 无论起始位置如何，该位置始终相对于字符串的开头。
' String to search in.
Dim searchString As String = "XXpXXpXXPXXP"
' Search for "P".
Dim searchChar As String = "P"
Dim testPos As Integer
' A textual comparison starting at position 4. Returns 6.
testPos = InStr(4, searchString, searchChar, CompareMethod.Text)
' A binary comparison starting at position 1. Returns 9.
testPos = InStr(1, SearchString, SearchChar, CompareMethod.Binary)
' If Option Compare is not set, or set to Binary, return 9.
' If Option Compare is set to Text, returns 3.
testPos = InStr(searchString, searchChar)
' Returns 0.
testPos = InStr(1, searchString, "W")
通常， InStr 函数在分析字符串时使用。
InStrB以前版本的 Visual Basic 中的 函数返回字节数，而不是字符位置。 它主要用于转换双字节字符集 (DBCS) 应用程序中的字符串。 所有 Visual Basic 2005 字符串都在 Unicode 中， InStrB 不再受支持。
Compare 参数的设置是：
返回的常量
Value
InStrRev(String, String, Int32, CompareMethod)
StrComp(String, String, CompareMethod)
ArgumentException
字符串 (Visual Basic)
字符串介绍 (Visual Basic)
Option Compare 语句
