Question

如何枚举出局域网内的sqlsever数据库服务器名

Answer 1

程序运行界面如下：

服务器列表中是局域网中所有的 SQL SERVER 服务器,选择服务器后输入用户名和密码，下拉数据库列表，程序会列出此服务器中的所有数据库.
程序源代码如下：
unit SqlServers;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Buttons, ComCtrls , SQLDMO_TLB;//注意别忘了引入此文件
type
TdmoObject = record
SQL_DMO : _SQLServer;
lConnected : boolean;
end;

type
TFormServersList = class(TForm)
Label1: TLabel;
Label2: TLabel;
CB_ServerNames: TComboBox;
CB_DataNames: TComboBox;
Label3: TLabel;
Label4: TLabel;
Ed_Login: TEdit;
Ed_Pwd: TEdit;
BitBtn1: TBitBtn;
BitBtn2: TBitBtn;
procedure FormCreate(Sender: TObject);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure FormShow(Sender: TObject);
procedure BitBtn2Click(Sender: TObject);
procedure CB_DataNamesDropDown(Sender: TObject);
private
server_Names : TStringList;
//对象集合
PdmoObject : array of TdmoObject;
//获取所有的远程服务器
Function GetAllServers(ServerList : TStringList) : Boolean;
{Private declarations}
public
{Public declarations}
end;

var
FormServersList: TFormServersList;
implementation

{$R *.DFM}

{TForm1}

Function TFormServersList.GetAllServers(ServerList : TStringList) : Boolean;
var
sApp : _Application ;
sName : NameList;
iPos : integer;
begin
Result := True ;
try
sApp := CoApplication_.Create ; //创建的对象不用释放，delphi 自己会释放
sName := sApp.ListAvailableSQLServers;
except
Result := False;
Exit;
end;
if sName.Count > 0 then // 之所以　iPos 从1开始,是因为0 位置为空值即 ' '
for iPos := 1 to sName.Count - 1 do
begin
CB_ServerNames.Items.Add(sName.Item(iPos));
ServerList.Add(sName.Item(iPos));
end;
end;

procedure TFormServersList.FormCreate(Sender: TObject);
var
lcv : integer;
begin
server_Names := TStringList.Create;
if not GetAllServers(server_Names) then
begin
Application.MessageBox('无法获取服务器列表,可能缺少客户端DLL库函数','错误提示',MB_OK);
exit;
end;
for lcv := 0 to server_Names.Count - 1 do
begin
SetLength(PdmoObject,lcv + 1);
with PdmoObject[lcv] do
begin
SQL_DMO := CoSQLServer.Create;
SQL_DMO.Name := Trim(server_Names[lcv]);
//登陆安全属性，NT 身份验证
SQL_DMO.LoginSecure := false;
// 设置一个连接超时
SQL_DMO.LoginTimeout := 3;
//自动重新登陆，如果第一次失败后
SQL_DMO.AutoReconnect := true;
SQL_DMO.ApplicationName := server_Names[lcv];
lConnected := false;
end;
end;
end;

procedure TFormServersList.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
server_Names.Free;
end;

procedure TFormServersList.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Action := CaFree;
end;

procedure TFormServersList.FormShow(Sender: TObject);
begin
if CB_ServerNames.Items.Count > 0 then //列举所有服务器名字
CB_ServerNames.Text := CB_ServerNames.Items.Strings[0];
end;

procedure TFormServersList.BitBtn2Click(Sender: TObject);
begin
Close ;
end;

procedure TFormServersList.CB_DataNamesDropDown(Sender: TObject);
var
icount ,Server_B : integer;
begin
CB_DataNames.Clear;
Screen.Cursor := CrHourGlass;
Server_B := CB_ServerNames.Items.IndexOf(CB_ServerNames.Text) ;
with PdmoObject[Server_B].SQL_DMO do
begin
if not PdmoObject[Server_B].lConnected then
try
Connect(Name,Trim(Ed_Login.Text),Trim(Ed_Pwd.Text));
except
Screen.Cursor := CrDefault ;
Application.MessageBox('请检查用户名或密码是否正确','连接失败',MB_OK);
Exit ;
end;
if not VerifyConnection(SQLDMOConn_ReconnectIfDead) then
begin
ShowMessage('在试图连接到SQL SERVER 2000 时出现错误' + #10#13 +
'确信是否加在了动态连接库SQLDMO.DLL');
exit;
end else
PdmoObject[Server_B].lConnected := True ;
Databases.Refresh(true);
for icount := 1 to Databases.Count do
CB_DataNames.Items.Add(Databases.Item(icount,null).name);
end;
Screen.Cursor := CrDefault ;
end
end.