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[英]Windows Workflow Foundation 3 wait inside parallel activity
[英]windows Workflow foundation - passing custom variable between different activity in a workflow
我正在將自定義變量類型從一個動作傳遞到工作流中的另一個動作。 這是自定義對象的定義
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;
}
}
在操作的第一步期間,它將運行以下代碼以從文件加載配置數據,並將其存儲在函數Execute中返回的對象(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;
}
}
在工作流的后續活動中,我想獲取存儲在該對象中的數據。 但是,以下代碼將出現編譯錯誤,因為EnvironmentDetail對象找不到函數GetDatabaseConnectionString。
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
}
}
編譯警告為以下“ System.Activities.InArgument”不包含“ GetDatabaseConnectionString”的定義,並且找不到擴展方法“ GetDatabaseConnectionString”接受類型為“ System.Activities.InArgument”的第一個參數(您是否缺少使用指令還是程序集引用?)
事實證明, EnvironmentDetail
的類型為InArgument
(或InArgument<ConfigEnvironment>
),但不是ConfigEnvironment
類型。您需要執行context.Get<ConfigEnvironment>()
以獲取ConfigEnvironment
類型的變量。
讓我知道這是否解決了您的問題,或者還有其他問題;-)
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