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我正在将自定义变量类型从一个操作传递到工作流中的另一个操作。这是自定义对象的定义

       public class ConfigDatabase
        {
            public string Name;
            public string Host;
            public string Port;
            public string Instance;
            public string User;
            public string Password;
        }

        public class ConfigDatabases
        {
            public string DatabaseToUse;
            public List<ConfigDatabase> DatabaseList;

            public ConfigDatabases()
            {
                DatabaseList = new List<ConfigDatabase>();
            }
        }

        public class ConfigEnvironment
        {
            public ConfigDatabases EnvironmentConfigDatabase;

            public ConfigEnvironment()
            {
                EnvironmentConfigDatabase = new ConfigDatabases();
            }

            public ConfigDatabase ReturnDatabaseInfo()
            {
                ConfigDatabase ConfigDatabaseInfo = new ConfigDatabase();
                for (int Count1 = 0; Count1 < EnvironmentConfigDatabase.DatabaseList.Count; Count1++)
                {
                    if (EnvironmentConfigDatabase.DatabaseList[Count1].Name == EnvironmentConfigDatabase.DatabaseToUse)
                    {
                        ConfigDatabaseInfo = EnvironmentConfigDatabase.DatabaseList[Count1];
                        return ConfigDatabaseInfo;
                    }
                }
                return ConfigDatabaseInfo;
            }

            public string GetDatabaseConnectionString()
            {
                ConfigDatabase DatabaseInfo = ReturnDatabaseInfo();
                string ConnectionString = "Data Source=(description=(address=(protocol=tcp)(host=" + DatabaseInfo.Host + ")(port=" + DatabaseInfo.Port + "))(connect_data=(sid=" + DatabaseInfo.Instance + ")));User ID=" + DatabaseInfo.User + ";Password=" + DatabaseInfo.Password + ";";
                return ConnectionString;
            }
        }

在操作的第一步中，它将运行以下代码以从文件加载配置数据并存储在函数 Execute 返回的对象（ConfigEnvironment）中

public sealed class InitializeEnvironment : CodeActivity<ConfigEnvironment>
{
    // Define an activity input argument of type string
    public InArgument<string> EnvironmentFileLocation { get; set; }

    // If your activity returns a value, derive from CodeActivity<TResult>
    // and return the value from the Execute method.
    protected override ConfigEnvironment Execute(CodeActivityContext context)
    {
        // Obtain the runtime value of the Text input argument
        string EnvironmentFile = context.GetValue(this.EnvironmentFileLocation);
        EnvironmentConfigInitialization EnvironmentInitialize = new EnvironmentConfigInitialization(EnvironmentFile);
        ConfigEnvironment EnvironmentDetail = EnvironmentInitialize.LoadData();
        return EnvironmentDetail;
    }
}

在工作流的后续活动中，我想获取存储在这个对象中的数据。但是，由于 EnvironmentDetail 对象找不到函数 GetDatabaseConnectionString，以下代码会出现编译错误。

public sealed class ExecuteSQL : CodeActivity<DataRowCollection>
{
    // Define an activity input argument of type string
    public InArgument<string> SQLScript { get; set; }
    public InArgument<ConfigEnvironment> EnvironmentDetail { get; set; }

    // If your activity returns a value, derive from CodeActivity<TResult>
    // and return the value from the Execute method.
    protected override DataRowCollection Execute(CodeActivityContext context)
    {

        string connectionString4 = EnvironmentDetail.GetDatabaseConnectionString(); //This create a compile error

}

}

编译警告是以下“System.Activities.InArgument”不包含“GetDatabaseConnectionString”的定义，并且找不到接受“System.Activities.InArgument”类型的第一个参数的扩展方法“GetDatabaseConnectionString”（您是否缺少使用指令还是程序集引用？）

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1 回答 1

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事实证明，EnvironmentDetailis 属于 Type InArgument（或InArgument<ConfigEnvironment>），但不是 TypeConfigEnvironment 您需要执行 acontext.Get<ConfigEnvironment>()来获取 Type 的变量ConfigEnvironment。

让我知道这是否解决了您的问题或者是否还有其他问题；-)

于 2013-03-14T20:53:11.197 回答