Delphi6函數大全（2）

首部function RightStr(const AText: string; const ACount: Integer): string; $[StrUtils.pas

功能返回字符串AText右邊的ACount個字符

說明RightStr('123456', 3) = '456'

參考function System.Copy

例子Edit3.Text := RightStr(Edit1.Text, SpinEdit1.Value);

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首部function MidStr(const AText: string; const AStart, ACount: Integer): string; $[StrUtils.pas

功能返回字符串AText從AStart開始的ACount個字符

說明其實就是Copy

參考function System.Copy

例子Edit3.Text := MidStr(Edit1.Text, SpinEdit1.Value, SpinEdit2.Value);

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首部function SearchBuf(Buf: PChar; BufLen: Integer; SelStart, SelLength: Integer; SearchString: String; Options: TStringSearchOptions = [soDown]): PChar; $[StrUtils.pas

功能返回第一個搜索到的指針位置

說明這函數常用於文本中搜索字符串

參考<NULL>

例子

///////Begin SearchBuf

function SearchEdit(EditControl: TCustomEdit; const SearchString: String;

SearchOptions: TStringSearchOptions; FindFirst: Boolean = False): Boolean;

var

Buffer, P: PChar;

Size: Word;

begin

Result := False;

if (Length(SearchString) = 0) then Exit;

Size := EditControl.GetTextLen;

if (Size = 0) then Exit;

Buffer := StrAlloc(Size + 1);

try

EditControl.GetTextBuf(Buffer, Size + 1);

P := SearchBuf(Buffer, Size, EditControl.SelStart, EditControl.SelLength,

SearchString, SearchOptions);

if P <> nil then begin

EditControl.SelStart := P - Buffer;

EditControl.SelLength := Length(SearchString);

Result := True;

end;

finally

StrDispose(Buffer);

end;

end;

PRocedure TForm1.Button1Click(Sender: TObject);

var

SearchOptions: TStringSearchOptions;

begin

SearchOptions := [];

if CheckBox1.Checked then

Include(SearchOptions, soDown);

if CheckBox2.Checked then

Include(SearchOptions, soMatchCase);

if CheckBox3.Checked then

Include(SearchOptions, soWholeWord);

SearchEdit(Memo1, Edit1.Text, SearchOptions);

Memo1.SetFocus;

end;

///////End SearchBuf

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首部function Soundex(const AText: string; ALength: TSoundexLength = 4): string; $[StrUtils.pas

功能返回探測字符串

說明根據探測法(Soundex)可以找到相進的字符串;http://www.nara.gov/genealogy/coding.Html

參考<NULL>

例子Edit2.Text := Soundex(Edit1.Text, SpinEdit1.Value);

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首部function SoundexInt(const AText: string; ALength: TSoundexIntLength = 4): Integer; $[StrUtils.pas

功能返回探測整數

說明ALength的值越大解碼準確率越高

參考<NULL>

例子SpinEdit2.Value := SoundexInt(Edit1.Text, SpinEdit1.Value);

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首部function DecodeSoundexInt(AValue: Integer): string; $[StrUtils.pas

功能返回探測整數的解碼

說明DecodeSoundexInt(SoundexInt('hello')) 相當於Soundex('hello')

參考<NULL>

例子Edit2.Text := DecodeSoundexInt(SpinEdit2.Value);

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首部function SoundexWord(const AText: string): Word; $[StrUtils.pas

功能返回探測文字數值

說明沒有參數ALength已經固定為4

參考<NULL>

例子SpinEdit2.Value := SoundexWord(Edit1.Text);

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首部function DecodeSoundexWord(AValue: Word): string; $[StrUtils.pas

功能返回探測文字數值的解碼

說明DecodeSoundexWord(SoundexWord('hello')) 相當於Soundex('hello')

參考<NULL>

例子Edit2.Text := DecodeSoundexWord(SpinEdit2.Value);

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首部function SoundexSimilar(const AText, AOther: string; ALength: TSoundexLength = 4): Boolean; $[StrUtils.pas

功能返回兩個字符串的探測字符串是否相同

說明Result := Soundex(AText, ALength) = Soundex(AOther, ALength)

參考<NULL>

例子CheckBox1.Checked := SoundexSimilar(Edit1.Text, Edit2.Text, SpinEdit1.Value);

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首部function SoundexCompare(const AText, AOther: string; ALength: TSoundexLength = 4): Integer; $[StrUtils.pas

功能返回比較兩個字符串的探測字符串的結果

說明Result := AnsiCompareStr(Soundex(AText, ALength), Soundex(AOther, ALength))

參考function SysUtils.AnsiCompareStr

例子SpinEdit2.Value := SoundexCompare(Edit1.Text, Edit2.Text, SpinEdit1.Value);

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首部function SoundeXProc(const AText, AOther: string): Boolean; $[StrUtils.pas

功能調用SoundexSimilar返回兩個字符串的探測字符串是否相同

說明系統變量AnsiResemblesProc的默認值

參考function StrUtils.AnsiResemblesText

例子[var AnsiResemblesProc: TCompareTextProc = SoundexProc;]