Question

我想手动拨打Installer.Install：

ProjectInstaller installer = new ProjectInstaller();
installer.Install(new Dictionary<int, int>());

问题：

System.ArgumentException was unhandled.
The value "_reserved_lastInstallerAttempted" is not of type "System.Int32"
and cannot be used in this generic collection.
       at System.ThrowHelper.ThrowWrongKeyTypeArgumentException(Object key, Type targetType)
       at System.Collections.Generic.Dictionary`2.System.Collections.IDictionary.Add(Object key, Object value)
       at System.Configuration.Install.Installer.Install(IDictionary stateSaver)
       at CSShellExtContextMenuHandler.ProjectInstaller.Install(IDictionary stateSaver) in C:\Users\win7pro32bit\Documents\lab\CSShellExtContextMenuHandler\ProjectInstaller.cs:line 40
       at Starter.Program.Main(String[] args) in C:\Users\win7pro32bit\Documents\lab\Starter\Program.cs:line 14

作为参数，我尝试了new Dictionary<int, int>，new Dictionary<string, string>和其他参数，但都没有效果。 documentation无济于事。有什么期待？

Answer 1

通过.NET Reflector运行System.Configuration.Install.Installer类会显示以下Install方法的内部实现：

public virtual void Install(IDictionary stateSaver)
{
    if (stateSaver == null)
    {
        throw new ArgumentException(Res.GetString("InstallNullParameter", new object[] { "stateSaver" }));
    }
    try
    {
        this.OnBeforeInstall(stateSaver);
    }
    catch (Exception exception)
    {
        this.WriteEventHandlerError(Res.GetString("InstallSeverityError"), "OnBeforeInstall", exception);
        throw new InvalidOperationException(Res.GetString("InstallEventException", new object[] { "OnBeforeInstall", base.GetType().FullName }), exception);
    }
    int num = -1;
    ArrayList list = new ArrayList();
    try
    {
        for (int i = 0; i < this.Installers.Count; i++)
        {
            this.Installers[i].Context = this.Context;
        }
        for (int j = 0; j < this.Installers.Count; j++)
        {
            Installer installer = this.Installers[j];
            IDictionary dictionary = new Hashtable();
            try
            {
                num = j;
                installer.Install(dictionary);
            }
            finally
            {
                list.Add(dictionary);
            }
        }
    }
    finally
    {
        stateSaver.Add("_reserved_lastInstallerAttempted", num);
        stateSaver.Add("_reserved_nestedSavedStates", list.ToArray(typeof(IDictionary)));
    }
    try
    {
        this.OnAfterInstall(stateSaver);
    }
    catch (Exception exception2)
    {
        this.WriteEventHandlerError(Res.GetString("InstallSeverityError"), "OnAfterInstall", exception2);
        throw new InvalidOperationException(Res.GetString("InstallEventException", new object[] { "OnAfterInstall", base.GetType().FullName }), exception2);
    }
}

stateSaver参数似乎在内部传递一个字符串，int KeyValuePair和一个字符串，IDicitionary [] KeyValuePair：

stateSaver.Add("_reserved_lastInstallerAttempted", num);
stateSaver.Add("_reserved_nestedSavedStates", list.ToArray(typeof(IDictionary)));

我不确定它是如何管理的。也许是因为他们正在初始化IDictionary，他们传递给base.Install方法作为Hashtable？

IDictionary dictionary = new Hashtable();

希望其中一些可以指出你正确的方向。

Installer.Install（IDictionary stateSaver）：期望什么字典类型？

1 个答案: