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这里的current problem:
执行卸载字符串命令行参数以下this solution:
下面是我们在非功能代码的形式:命令行参数:函数返回类型为数组?
const MAX_PATH = 260;
function GetUninstallString(): TArrayOfString;
var
sUnInstPath: String;
sUnInstallString: String;
sUnInstallStringPrm: String;
begin
sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#MyAppName}');
sUnInstallString := '';
if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
if sUnInstallString = '' Then
Begin
sUnInstPath := ExpandConstant('Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{#MyAppName}');
RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString);
End;
if sUnInstallString <> '' Then
Begin
sUnInstallStringPrm:= copy(sUnInstallString, pos(' ', sUnInstallString) + 1, MAX_PATH);
MsgBox(sUnInstallStringPrm, mbInformation, MB_OK);
Delete(sUnInstallString, pos(' ', sUnInstallString), MAX_PATH);
End;
Result := [sUnInstallString, UnInstallStringPrm];
end;
/////////////////////////////////////////////////////////////////////
function IsUpgrade(): Boolean;
begin
Result := (GetUninstallString() <> '');
end;
/////////////////////////////////////////////////////////////////////
function UnInstallOldVersion(): Integer;
var
sUnInstallString: String;
iResultCode: Integer;
begin
// Return Values:
// 1 - uninstall string is empty
// 2 - error executing the UnInstallString
// 3 - successfully executed the UnInstallString
// default return value
Result := 0;
// get the uninstall string of the old app
sUnInstallString := GetUninstallString();
if sUnInstallString <> '' then begin
sUnInstallString := RemoveQuotes(sUnInstallString);
if ShellExec('open', sUnInstallString, '','', SW_SHOW, ewWaitUntilTerminated, iResultCode) then
Result := 3
else
Result := 2;
end else
Result := 1;
end;
/////////////////////////////////////////////////////////////////////
procedure CurStepChanged(CurStep: TSetupStep);
begin
if (CurStep=ssInstall) then
begin
if (IsUpgrade()) then
begin
UnInstallOldVersion();
end;
end;
end;
有关于如何很小信息在这种情况下使用GetUninstallString。有可能吗?
不知道,作为一种替代,含有sUnInstallString ...字符串数组可以与上述固定装置内的参数作为阵列似乎适合更好一点通过,尽管返回类型。
非常感谢您的帮助。在这种情况下,Wise使用了8.3个名字,因此空间很容易 - 但是。 :) –