我怎樣才能加快在SQL數據庫表中插入文本文件？

Question

我的文本文件是

Town 1, Street Address, Street number 1, Region 1, 125 07 
Town 1, Street Address 12, Street number 1, Region 34, 141 07 
Town 2, Street Address 345, Street number 1, Region 23, 190 07 
Town 2, Street Address 233, Street number 1, Region , 190 11 

我目前做的插入在SQL數據庫表如下。

var fileContents = System.IO.File.ReadAllText(Server.MapPath(@"~/App_Data/zipcodes.txt"), Encoding.GetEncoding(1253)); 
var Line = fileContents.Split(new string[] {"\n", "\r\n"}, StringSplitOptions.RemoveEmptyEntries); 
var Array = new string[5]; 
foreach (string s in Line) 
    { 
     Array = s.Split(','); 
     storeDB.ZipCodes.Add(new ZipCodes {Town = Array[0], 
              StreetAddress = Array[1], 
              StreetNumber = Array[2], 
              Region = Array[3], 
              PostalCode = Array[4].Replace(" ", "")}); 
    } 
    storeDB.SaveChanges(); 

由於該文件包含50000+條記錄，我想以另一種方式插入，速度更快。任何建議？

Answer 1

您可以使用BULK INSERT

BULK INSERT db_name.schema.table 
FROM '...path .../zipcodes.txt' 
WITH ( 
    FIELDTERMINATOR = ',', 
    ROWTERMINATOR = '\n' 
    ); 

有許多配置可在需要時像CODEPAGE或FIRSTROW等等...

Answer 2

SqlBulkCopy是你在尋找什麼（它是特殊類快速負載大數據量到SQL Server）：

using (SqlConnection cn = new SqlConnection(...)) 
{ 
     cn.Open(); 
     using (SqlBulkCopy copy = new SqlBulkCopy(cn)) 
     { 
      copy.WriteToServer(dataTable); 
     } 
} 

只需加載您的CSV到DataTable第一（這是微不足道的）

http://www.codeproject.com/Tips/309564/SQL-Bulk-copy-method-to-insert-large-amount-of-dat