VS05自带打包功能（virusplayer ）

public override void Install(System.Collections.IDictionary stateSaver)

        {

            base.Install(stateSaver);

            Form1 fr = new Form1();

            if (fr.ShowDialog() == System.Windows.Forms.DialogResult.OK)

            {

                try

                {

                    XmlDocument xmldocument = new XmlDocument();

                    xmldocument.Load(Path.Combine(getpath(), "Web.config"));



                    //'查找到appsettings中的节点



                    //XmlNode node=new XmlNode();



                    bool FoundIt = false;

                    XmlNodeList nodes = xmldocument.SelectSingleNode("/configuration/connectionStrings").ChildNodes;

                    foreach (XmlNode node in nodes)

                    {

                        if (node.Name == "add")

                        {

                            if (node.Attributes["name"].Value == "myconnString")

                            {

                                //'写入连接字符串

                                node.Attributes["connectionString"].Value = String.Format("Data Source={0};User ID={1};pwd={2};Initial Catalog={3}",

                                    fr.DbServer, fr.LoginName, fr.Password, fr.Db);

                                FoundIt = true;

                                xmldocument.Save(Path.Combine(getpath(), "Web.config"));

                            }

                        }

                    }



                    if (!FoundIt)

                    {

                        throw new ApplicationException("Web.Config 文件没有包含connectionString连接字符串设置");

                    }

                    else

                    {

                        CreateVirtualDir(fr.SiteName, this.Context.Parameters[""]);

                    }



                }

                catch (Exception ex)

                {

                    throw ex;

                }

            }

            else

            {

                throw new ApplicationException("应用程序数据库安装失败");

            }

        }