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我在LabeledEdit的OnChange中写了如下代码来生成该LabeledEdit.txt的拼音字头
procedure TDict1Frm.LabeledEdit2Change(Sender: TObject);
var
i: integer;
flag: Boolean;
begin
flag:=false;
//判断被提取拼音字头的字符串是否为纯汉字字符串
if (length(LabeledEdit2.Text) mod 2) <> 0 then
flag:=false
else
for i:=1 to length(LabeledEdit2.Text) do
if (i mod 2)=1 then
if (WORD(LabeledEdit2.Text) shl 8 + WORD(LabeledEdit2.Text[i+1]) >= $B0A1)
and (WORD(LabeledEdit2.Text) shl 8 + WORD(LabeledEdit2.Text[i+1]) <= $D7F9) then
flag:=true
else
flag:=false;
if flag = true then
LabeledEdit3.Text:=GetPYIndexString(LabeledEdit2.Text);
end;
GetPYIndexString(ChString:string);为拼音字头生成函数，如下
function GetPYIndexString( ChString:string):string;
var
i:integer;
begin //根据一个汉字字符串取得拼音字头，不对汉字字符串做校验
if ChString = '' then
result:='';
for i:=1 to length(ChString) do
if (i mod 2) = 1 then
case WORD(ChString) shl 8 + WORD(ChString[i+1]) of
$B0A1..$B0C4 : result := result+'A';
$B0C5..$B2C0 : result := result+'B';
$B2C1..$B4ED : result := result+'C';
$B4EE..$B6E9 : result := result+'D';
$B6EA..$B7A1 : result := result+'E';
$B7A2..$B8C0 : result := result+'F';
$B8C1..$B9FD : result := result+'G';
$B9FE..$BBF6 : result := result+'H';
$BBF7..$BFA5 : result := result+'J';
$BFA6..$C0AB : result := result+'K';
$C0AC..$C2E7 : result := result+'L';
$C2E8..$C4C2 : result := result+'M';
$C4C3..$C5B5 : result := result+'N';
$C5B6..$C5BD : result := result+'O';
$C5BE..$C6D9 : result := result+'P';
$C6DA..$C8BA : result := result+'Q';
$C8BB..$C8F5 : result := result+'R';
$C8F6..$CBF9 : result := result+'S';
$CBFA..$CDD9 : result := result+'T';
$CDDA..$CEF3 : result := result+'W';
$CEF4..$D188 : result := result+'X';
$D1B9..$D4D0 : result := result+'Y';
$D4D1..$D7F9 : result := result+'Z';
end;
end;
问题来了，当我输入几个中文字符串后，按回退键删除全部字符串时，在接受拼音字头的
LabeledEdit中总是剩下原先第一个汉字的拼音字头，百思不得其解，希望高人指教！
procedure TDict1Frm.LabeledEdit2Change(Sender: TObject);
var
i: integer;
flag: Boolean;
begin
flag:=false;
//判断被提取拼音字头的字符串是否为纯汉字字符串
if (length(LabeledEdit2.Text) mod 2) <> 0 then
flag:=false
else
for i:=1 to length(LabeledEdit2.Text) do
if (i mod 2)=1 then
if (WORD(LabeledEdit2.Text) shl 8 + WORD(LabeledEdit2.Text[i+1]) >= $B0A1)
and (WORD(LabeledEdit2.Text) shl 8 + WORD(LabeledEdit2.Text[i+1]) <= $D7F9) then
flag:=true
else
flag:=false;
if flag = true then
LabeledEdit3.Text:=GetPYIndexString(LabeledEdit2.Text);
end;
GetPYIndexString(ChString:string);为拼音字头生成函数，如下
function GetPYIndexString( ChString:string):string;
var
i:integer;
begin //根据一个汉字字符串取得拼音字头，不对汉字字符串做校验
if ChString = '' then
result:='';
for i:=1 to length(ChString) do
if (i mod 2) = 1 then
case WORD(ChString) shl 8 + WORD(ChString[i+1]) of
$B0A1..$B0C4 : result := result+'A';
$B0C5..$B2C0 : result := result+'B';
$B2C1..$B4ED : result := result+'C';
$B4EE..$B6E9 : result := result+'D';
$B6EA..$B7A1 : result := result+'E';
$B7A2..$B8C0 : result := result+'F';
$B8C1..$B9FD : result := result+'G';
$B9FE..$BBF6 : result := result+'H';
$BBF7..$BFA5 : result := result+'J';
$BFA6..$C0AB : result := result+'K';
$C0AC..$C2E7 : result := result+'L';
$C2E8..$C4C2 : result := result+'M';
$C4C3..$C5B5 : result := result+'N';
$C5B6..$C5BD : result := result+'O';
$C5BE..$C6D9 : result := result+'P';
$C6DA..$C8BA : result := result+'Q';
$C8BB..$C8F5 : result := result+'R';
$C8F6..$CBF9 : result := result+'S';
$CBFA..$CDD9 : result := result+'T';
$CDDA..$CEF3 : result := result+'W';
$CEF4..$D188 : result := result+'X';
$D1B9..$D4D0 : result := result+'Y';
$D4D1..$D7F9 : result := result+'Z';
end;
end;
问题来了，当我输入几个中文字符串后，按回退键删除全部字符串时，在接受拼音字头的
LabeledEdit中总是剩下原先第一个汉字的拼音字头，百思不得其解，希望高人指教！