2

嘿,目前我不确定它是如何得到官方支持的,但是有报道称人们成功地将 monodroid 与 vici coolStorage 一起使用。我已经能够将程序集放入我的项目并进行编译,但是,某些类在我尝试使用它们时会引发编译时错误。特别是在尝试像网站上的 monoTouch 示例那样连接时。.


string dbName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), "mydb.db3");

// The following line will tell CoolStorage where the database is,
// create it if it does not exist, and call a delegate which
// creates the necessary tables (only if the database file was
// created new)

CSConfig.SetDB(dbName, true, () => {
   CSDatabase.ExecuteNonQuery(@"CREATE TABLE person 
                                 (PersonID INTEGER PRIMARY KEY AUTOINCREMENT,
                                  Name TEXT(50) NOT NULL,
                                  DateOfBirth TEXT(30) NULL)");

});

尝试使用 CSConfig 的方法时没有智能感知,当我尝试将 3 个 args 传递给 CSConfig.SetDB() 时,我收到无效数量的 args 错误。

4

2 回答 2

4

我认为他们的样本有问题。如果您使用 Visual Studio 程序集浏览器或 MonoDevelop 程序集浏览器,甚至只是monop -r:Vici.CoolStorage.MT.dll Vici.CoolStorage.CSConfig,您将看到以下重载SetDB

public static void SetDB (CSDataProvider db);
public static void SetDB (CSDataProvider db, string contextName);
public static void SetDB (string dbName);
public static void SetDB (string dbName, Action creationDelegate);
public static void SetDB (string dbName, SqliteOption sqliteOption);
public static void SetDB (string dbName, SqliteOption sqliteOption, Action creationDelegate);

这些都不接受bool作为第二个参数,所以我认为他们的样本有问题。

修复方法是按照编译器的说明进行操作,并使用实际存在的重载:

CSConfig.SetDB(dbName, () => {
    CSDatabase.ExecuteNonQuery(
        @"CREATE TABLE person 
        (PersonID INTEGER PRIMARY KEY AUTOINCREMENT,
         Name TEXT(50) NOT NULL,
         DateOfBirth TEXT(30) NULL)");
});
于 2011-09-07T14:05:50.877 回答
0

好的,这就是交易。该示例是错误的,显然该项目是开源的。

所以在最新版本中。bool 没有过载。请参阅源代码片段。



using System;
using System.IO;
using Mono.Data.Sqlite;

namespace Vici.CoolStorage
{
    [Flags]
    public enum SqliteOption
    {
        None = 0,
        CreateIfNotExists = 1,
        UseConnectionPooling = 2
    }

    public static partial class CSConfig
    {
        public static void SetDB(string dbName)
        {
            SetDB(dbName,SqliteOption.UseConnectionPooling);
        }

        public static void SetDB(string dbName, Action creationDelegate)
        {
            SetDB(dbName,SqliteOption.UseConnectionPooling|SqliteOption.CreateIfNotExists, creationDelegate);
        }

        public static void SetDB(string dbName, SqliteOption sqliteOption)
        {
            SetDB(dbName,sqliteOption,null);
        }

        public static void SetDB(string dbName, SqliteOption sqliteOption, Action creationDelegate)
        {
            bool exists = File.Exists(dbName);
            bool createIfNotExists = (sqliteOption & SqliteOption.CreateIfNotExists) != 0;
            bool usePooling = (sqliteOption & SqliteOption.UseConnectionPooling) != 0;

            if (!exists && createIfNotExists)
            SqliteConnection.CreateFile(dbName);

            SetDB(new CSDataProviderSQLite("Data Source=" + dbName + ";Pooling=" + usePooling), DEFAULT_CONTEXTNAME);

            if (!exists && createIfNotExists && creationDelegate != null)
                creationDelegate();
        }
    }
}

于 2011-09-07T14:09:53.570 回答