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Added: ValueExists method

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Fixed: Registry check if value exists to prevent unneccesary exceptions
This commit is contained in:
Mark van Renswoude 2004-06-08 18:45:47 +00:00
parent 3f8b9fc77b
commit c90841f23e
3 changed files with 37 additions and 20 deletions
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2
X2UtSettings.pas
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@ -60,6 +60,8 @@ type
procedure WriteInteger(const AName: String; AValue: Integer); virtual; abstract;
procedure WriteString(const AName, AValue: String); virtual; abstract;
function ValueExists(const AName: String): Boolean; virtual; abstract;
procedure GetSectionNames(const ADest: TStrings); virtual; abstract;
procedure GetValueNames(const ADest: TStrings); virtual; abstract;

8
X2UtSettingsINI.pas
View File

@ -65,6 +65,8 @@ type
procedure WriteInteger(const AName: String; AValue: Integer); override;
procedure WriteString(const AName, AValue: String); override;
function ValueExists(const AName: String): Boolean; override;
procedure GetSectionNames(const ADest: TStrings); override;
procedure GetValueNames(const ADest: TStrings); override;
@ -174,6 +176,12 @@ end;
{========================= TX2INISettings
Enumeration
========================================}
function TX2INISettings.ValueExists;
begin
Result := FData.ValueExists(FSection, AName);
end;
procedure TX2INISettings.GetSectionNames;
var
slSections: TStringList;

47
X2UtSettingsRegistry.pas
View File

@ -71,6 +71,8 @@ type
procedure WriteInteger(const AName: String; AValue: Integer); override;
procedure WriteString(const AName, AValue: String); override;
function ValueExists(const AName: String): Boolean; override;
procedure GetSectionNames(const ADest: TStrings); override;
procedure GetValueNames(const ADest: TStrings); override;
@ -169,50 +171,48 @@ end;
========================================}
function TX2RegistrySettings.ReadBool;
begin
if OpenRead() then
Result := ADefault;
if (OpenRead()) and (FData.ValueExists(AName)) then
try
Result := FData.ReadBool(AName)
except
Result := ADefault;
end
else
Result := ADefault;
// Silently ignore exceptions so the
// default value gets returned
end;
end;
function TX2RegistrySettings.ReadFloat;
begin
if OpenRead() then
Result := ADefault;
if (OpenRead()) and (FData.ValueExists(AName)) then
try
Result := FData.ReadFloat(AName)
except
Result := ADefault;
end
else
Result := ADefault;
end;
end;
function TX2RegistrySettings.ReadInteger;
begin
if OpenRead() then
Result := ADefault;
if (OpenRead()) and (FData.ValueExists(AName)) then
try
Result := FData.ReadInteger(AName)
except
Result := ADefault;
end
else
Result := ADefault;
end;
end;
function TX2RegistrySettings.ReadString;
begin
if OpenRead() then
Result := ADefault;
if (OpenRead()) and (FData.ValueExists(AName)) then
try
Result := FData.ReadString(AName)
except
Result := ADefault;
end
else
Result := ADefault;
end;
end;
@ -253,6 +253,7 @@ begin
FData.GetKeyNames(ADest);
end;
procedure TX2RegistrySettings.GetValueNames;
begin
if OpenRead() then
@ -280,4 +281,10 @@ begin
FData.DeleteValue(AName);
end;
function TX2RegistrySettings.ValueExists;
begin
if OpenRead() then
Result := FData.ValueExists(AName);
end;
end.