[英]Enumerate Microsoft SQL database servers on the local network, using delphi
您可以使用NetServerEnum函数,通过SV_TYPE_SQLSERVER
参数中的SV_TYPE_SQLSERVER
值进行过滤,另一个选项是使用SQLOLEDB Enumerator
ADO对象。
我用这个代码:
uses ActiveX,
ComObj,
OleDB,
DB,
ADOInt,
ADODB;
procedure ListAvailableSQLServers(Names: TStringList);
var
RSCon: ADORecordsetConstruction;
Rowset: IRowset;
SourcesRowset: ISourcesRowset;
SourcesRecordset: _Recordset;
SourcesName, SourcesType: TField;
function PtCreateADOObject(const ClassID: TGUID): IUnknown;
var
Status: HResult;
FPUControlWord: Word;
begin
asm
FNSTCW FPUControlWord
end;
Status := CoCreateInstance(
CLASS_Recordset,
nil,
CLSCTX_INPROC_SERVER or
CLSCTX_LOCAL_SERVER,
IUnknown,
Result);
asm
FNCLEX
FLDCW FPUControlWord
end;
OleCheck(Status);
end;
begin
SourcesRecordset :=
PtCreateADOObject(CLASS_Recordset)
as _Recordset;
RSCon :=
SourcesRecordset
as ADORecordsetConstruction;
SourcesRowset :=
CreateComObject(ProgIDToClassID('SQLOLEDB Enumerator'))
as ISourcesRowset;
OleCheck(SourcesRowset.GetSourcesRowset(
nil,
IRowset, 0,
nil,
IUnknown(Rowset)));
RSCon.Rowset := RowSet;
with TADODataSet.Create(nil) do
try
Recordset := SourcesRecordset;
SourcesName := FieldByName('SOURCES_NAME');
SourcesType := FieldByName('SOURCES_TYPE');
Names.BeginUpdate;
Names.Clear;
try
while not EOF do
begin
if (SourcesType.AsInteger = DBSOURCETYPE_DATASOURCE) and
(SourcesName.AsString <> '') then
Names.Add(SourcesName.AsString);
Next;
end;
finally
Names.EndUpdate;
end;
finally
Free;
end;
end;
procedure GetServer();
var
oItems: TStringList;
begin
oItems:= TStringList.Create;
try
ListAvailableSQLServers(oItems);
// To something with oItems
ShowMessage(oItems.Text);
finally
oItems.Free;
end;
end;
要枚举所有可用的Microsoft SQL Server,您可以遵循以下优秀教程:
包含在Zarko的教程中,有一个链接可以下载完整的源代码(直接下载) ,这对于快速测试并检查它是否符合您的需求非常有用。
编辑 Zarko Gajic的主要例程是:
procedure ListAvailableSQLServers(Names : TStrings);
var
RSCon: ADORecordsetConstruction;
Rowset: IRowset;
SourcesRowset: ISourcesRowset;
SourcesRecordset: _Recordset;
SourcesName, SourcesType: TField;
function PtCreateADOObject(const ClassID: TGUID): IUnknown;
var
Status: HResult;
FPUControlWord: Word;
begin
asm
FNSTCW FPUControlWord
end;
Status := CoCreateInstance(
CLASS_Recordset,
nil,
CLSCTX_INPROC_SERVER or CLSCTX_LOCAL_SERVER,
IUnknown,
Result);
asm
FNCLEX
FLDCW FPUControlWord
end;
OleCheck(Status);
end;
begin
SourcesRecordset := PtCreateADOObject(CLASS_Recordset) as _Recordset;
RSCon := SourcesRecordset as ADORecordsetConstruction;
SourcesRowset := CreateComObject(ProgIDToClassID('SQLOLEDB Enumerator')) as ISourcesRowset;
OleCheck(SourcesRowset.GetSourcesRowset(nil, IRowset, 0, nil, IUnknown(Rowset)));
RSCon.Rowset := RowSet;
with TADODataSet.Create(nil) do
try
Recordset := SourcesRecordset;
SourcesName := FieldByName('SOURCES_NAME'); { do not localize }
SourcesType := FieldByName('SOURCES_TYPE'); { do not localize }
Names.BeginUpdate;
try
while not EOF do
begin
if (SourcesType.AsInteger = DBSOURCETYPE_DATASOURCE) and (SourcesName.AsString <> '') then
Names.Add(SourcesName.AsString);
Next;
end;
finally
Names.EndUpdate;
end;
finally
Free;
end;
end;
我不知道我能添加什么,而不会贬低Zarko的解释。
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