LINQ 查询的同一条记录

Thu, 29 May 2008 14:21:40 GMT

星期四天气:多云

延迟加载中,多次查询同一条记录,会返回同一个对象. 但如果设置ObjectTrackingEnabled = false,则是不同的.

Attach,可以管理被反序列化的对象,将其从新投入DataContent的怀抱.

刚刚VS2008 完成了一个工具软件,里面充满了LINQ,贴几个有特点的以示留念!

Wed, 07 May 2008 08:58:53 GMT

星期三天气:晴

LINQ to Sting:

var s = "Server=172.17.1.1;uid=test;pwd=123;database=test".split(';')

获取服务器地址:(from valuer in s

where value.ToLower().Contains("server")
select value.Split('=')).First().ElementAt(1)

LINQ TO XML

private void WriterBlock(DataTable dttBlock)
        {
            XElement xmlBlock = new XElement(
                "Blocks",
                from DataRow row in dttBlock.AsEnumerable()
                select new XElement(
                    "Block",
                    new XElement("ModuleID", row.Field("cModuleID")),
                    new XElement("UnitID", row.Field("cUnitID")),
                    new XElement("BlockWidth", row.Field("iBlockWidth")),
                    new XElement("BlockHeight", row.Field("iBlockHeight")),
                    new XElement("BlockPath", row.Field("cBlockPath"))
                    )
                );
            var searchModuleID = (from module in dttBlock.AsEnumerable()
                                  select module.Field("cModuleID")).Distinct();
            foreach (var moduleID in searchModuleID)
            {
                List eleBlock = (from XElement ele in xmlBlock.Elements("Block")
                                          where ele.Element("ModuleID").Value == moduleID
                                          select ele).ToList();
                System.IO.FileStream file = System.IO.File.Create("C:\\TestDownload\\RIT-" + moduleID + "-03.SQL", 512);
                using (var temp = new System.IO.StreamWriter(file))
                {
                    foreach (XElement ele in eleBlock)
                    {
                        temp.WriteLine(@"INSERT INTO tFrrBlockUnit (cUnitID, iBlockWidth, iBlockHeight, cBlockPath) VALUES ('{0}', '{1}', '{2}', '{3}')",
                            ele.Element("UnitID").Value,
                            ele.Element("BlockWidth").Value,
                            ele.Element("BlockHeight").Value,
                            ele.Element("BlockPath").Value
                            );
                    }
                }
            }
        }

不及格的程序员-八神: LINQ to What

LINQ 查询的同一条记录

刚刚VS2008 完成了一个工具软件,里面充满了LINQ,贴几个有特点的以示留念!