Question

我一直在玩UniObjects .NET。

我希望能够运行SELECT查询并将数据输入到可以运行数据的表单中。

我一直在使用的文档位于http://www.rocketsoftware.com/u2/products/universe/resources/technical-manuals/universe-v11r1/uonet-v11r1.pdf

我目前正在使用

运行查询

            // UniCommans is a new instance of the CreateUniCommand() method
            UniCommand cmd = us1.CreateUniCommand();

            string UVDatabaseName = "SLCUST";

            // Command is the query that will be sent to the server to be rum
            cmd.Command = "SELECT " + UVDatabaseName + " USING DICT " + UVDatabaseName + " WITH CUSREF PRICECODE";

但我不知道如何将数据输入到它们提供的数据类型对象之一：

UniDynArray
UniFile

UniSelectList

        // OpenSession is used to open a new session to the database
        us1 = UniObjects.OpenSession("92.0.0.1", "username", "password", "/path/TOFILE", "uvcs");

        // Create new instance a UniCommand
        UniCommand cmd = us1.CreateUniCommand();

        string UVDatabaseName = "SLCUST";

        // Command is the query that will be sent to the server to be run
        cmd.Command = "SELECT " + UVDatabaseName + " USING DICT " + UVDatabaseName + " WITH CUSREF PRICECODE";

        // Buffer size for receiving data can be get/set using CommandBlockSize
        // 0 is unlimited, the full data set will be received
        cmd.CommandBlockSize = 0;

        // Execute() executes the Command on the server
        cmd.Execute();

        // A status response is returned as a string in Response
        string response_str = cmd.Response;

        Console.WriteLine(response_str);

        // Check for the response of the UniCommand
        // UVS_COMPLETE = The command was completed, or unsuccessful
        if (cmd.CommandStatus == UniObjectsTokens.UVS_COMPLETE)
        {


            // How do I loop through the data set from my query?



        }

我已经知道我可以使用以下代码运行WHOLE表：

// Create a Uni file, required for you can use a database file
UniFile custfile = us1.CreateUniFile("SLCUST");

// Create a select list from the ID returned from cmd.Response;
UniSelectList selectList = us1.CreateUniSelectList(0);

selectList.Select(custfile);


bool lLastRecord = selectList.LastRecordRead;

while (!lLastRecord)
{
    string s = selectList.Next();
    Console.WriteLine("Record ID:" + s);
    lLastRecord = selectList.LastRecordRead;
}

当我运行命令时，我得到以下响应字符串

4665条记录被选择为SELECT list＃0

这就是如何访问列表'0'，我已经尝试了但是它是如何将它按到正确的类类型：

UniSelectList selectList = us1.CreateUniSelectList(0);

Answer 1

你越来越近了。默认情况下，“SELECT”命令将生成一个键列表到选择列表0。所以你只需要为它分配一个UniSelectList对象。您实际上并不想查看命令响应，除非您要检查命令是否生成错误：

 // OpenSession is used to open a new session to the database
    us1 = UniObjects.OpenSession("92.0.0.1", "username", "password", "/path/TOFILE", "uvcs");

    // Create new instance a UniCommand
    UniCommand cmd = us1.CreateUniCommand();

    string UVDatabaseName = "SLCUST";

    // Command is the query that will be sent to the server to be run
    cmd.Command = "SELECT " + UVDatabaseName + " USING DICT " + UVDatabaseName + " WITH CUSREF PRICECODE";

    UniSelectList uSelect = uSession.selectList (0);
    // Execute() executes the Command on the server
    cmd.Execute();

    while (!lLastRecord)
    {
      string s = uSelect.Next();
      Console.WriteLine("Record ID:" + s);
      lLastRecord = selectList.LastRecordRead;
    }

Uni Objects .NET运行查询并获取结果集

1 个答案: