针对版本'v2.0.50727'的错误混合模式程序集..在运行安装程序时创建表，安装程序类

Question

我有窗口应用程序，已经制作了一些 custom action，编辑 userinterface 在安装应用程序时从用户检索值，并在创建表时进一步在安装程序类中获取以下错误消息

Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot
be loaded in the 4.0 runtime without additional configuration information.

我google了很多，发现在下面添加会解决问题（不适合我）

 <startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
    <supportedRuntime version="v2.0.50727"/>
  </startup>

以前我的 app.confg 看起来像

<startup>
      <supportedRuntime version="v2.0.50727"/>
  </startup>

代码：Installer1.cs

public override void Install(IDictionary stateSaver)
        {
            base.Install(stateSaver);
            string targetDirectory = Context.Parameters["targetdir"];
            string servername = Context.Parameters["dbservername"];
            string dbname = Context.Parameters["dbname"];
            string strconnectionstring = "Data Source='" + servername + "';Initial Catalog='" + dbname + "';Integrated Security=True";

            if (servername == "")
            {
                throw new InstallException("You did not Specify SQL Servername!");
            }

            else if (dbname == "")
            {
                throw new InstallException("You did not specify the database name!");
            }

            string exePath = string.Format("{0}abc..exe", targetDirectory);
            System.Configuration.Configuration conf = ConfigurationManager.OpenExeConfiguration(exePath);
            conf.ConnectionStrings.ConnectionStrings["abc"].ConnectionString = strconnectionstring;
            conf.Save(ConfigurationSaveMode.Modified);


            using (SqlConnection con1 = new SqlConnection(strconnectionstring))
            {
                System.Diagnostics.Debugger.Break();
                string getScript = "Use " + dbname + "; CREATE TABLE supportContacts ( id int identity primary key,  type varchar(20),  details varchar(30)  )";
               // string strscript = getScript;
                Server server = new Server(new ServerConnection(con1));
                server.ConnectionContext.ExecuteNonQuery(getScript );
                con1.Close();
            }   


        }

调试时我知道错误发生在 server.ConnectionContext.ExecuteNonQuery(strupdatescript);

Answer 1

对我来说，以下工作：

<startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>

Answer 2

我遇到了同样的问题。如果有人能揭露什么可以解决这个问题，非常感谢。

我找到了/答案:)。为我工作。

http://reedcopsey.com/2011/09/15/setting-uselegacyv2runtimeactivationpolicy-at-runtime/