C# 如何通过拼接XML调用存储过程来优化系统性能

   平常新增多条记录，需要多次访问数据库，这样会影响性能；如果把新增的数据拼接成XML形式，作为参数传给存储过程来处理，这只访问数据库一次，执行速度会快很多。

1.C#代码如下：XML拼接的字段不能出现&等其他执行存储过程不支持的符号，需要转义，C#里面的方法是 1.Server.HtmlEncode(参数值);2. ReplaceXmlStr(参数值);

/// <summary>
/// XML特殊字符替换
/// </summary>
/// <param name="str"></param>
public static string ReplaceXmlStr(string str)
{
if (!string.IsNullOrEmpty(str))
{
  str = str.Replace("'", " "); //20140420 add
  str = str.Replace("<", "&lt;");
  str = str.Replace(">", "&gt;");
  str = str.Replace("&", "&amp;");
  str = str.Replace("'", "&apos;");
  str = str.Replace(""", "&quot;");
}
  return str;
}

另外注意：

foreach循环不要这样写：

MovementItemWmsInfoToXM = string.Format(MovementItemWmsInfoToXML, item.SkuCode, item.MovenmentCode, item.Effect,
                    item.Skunum, item.PropertityStock, item.PromotionCode.Replace("&", "%"), item.StockoutCount, item.StockSerialNumber,
                        !string.IsNullOrEmpty(item.UnitPrice) ? double.Parse(item.UnitPrice).ToString("0.00") : "0"
                        ,item.ShipperId)
strBuilder.AppendLine(MovementItemWmsInfoToXM);

应该这样写：

strBuilder.AppendFormat(MovementItemWmsInfoToXML, item.SkuCode, item.MovenmentCode, item.Effect,
                    item.Skunum, item.PropertityStock, item.PromotionCode.Replace("&", "%"), item.StockoutCount, item.StockSerialNumber,
                        !string.IsNullOrEmpty(item.UnitPrice) ? double.Parse(item.UnitPrice).ToString("0.00") : "0"
                        ,item.ShipperId);

或strBuilder.Append(string.Format(MovementItemWmsInfoToXML, item.SkuCode, item.MovenmentCode, item.Effect,item.Skunum, item.PropertityStock, item.PromotionCode.Replace("&", "%"), item.StockoutCount, item.StockSerialNumber,!string.IsNullOrEmpty(item.UnitPrice) ? double.Parse(item.UnitPrice).ToString("0.00") : "0",item.ShipperId));

//拼接XML
private static string MovementItemWmsInfoToXML = "<MovementItemWmsInfoTO SkuCode="{0}" MovenmentCode="{1}" Effect="{2}" Skunum="{3}"  PropertityStock="{4}" " +
  "PromotionCode="{5}"  StockoutCount="{6}"  StockSerialNumber="{7}"  UnitPrice="{8}"  ShipperId="{9}"/>";

/// <summary>
/// 调用存储过程插入MovementItemWmsInfo信息
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public int InsertMovementItemWmsInfoByListstring(List<MovementItemWmsInfoTO> list)
{
    int result = 0;
    try
    {
        if (list != null && list.Count > 0)
        {
            StringBuilder strBuilder = new StringBuilder();
            foreach (MovementItemWmsInfoTO item in list)
            {
                strBuilder.AppendLine(string.Format(MovementItemWmsInfoToXML, item.SkuCode, item.MovenmentCode, item.Effect,
                    item.Skunum, item.PropertityStock, item.PromotionCode.Replace("&", "%"), item.StockoutCount, item.StockSerialNumber,
                        !string.IsNullOrEmpty(item.UnitPrice) ? double.Parse(item.UnitPrice).ToString("0.00") : "0"
                        ,item.ShipperId));
            }

            List<SqlParameter> param = new List<SqlParameter>();
            param.Add(new SqlParameter("@MovementItemWmsInfoToXML", strBuilder.ToString()));

            result = Convert.ToInt32(SqlHelper.ExecuteScalar(SqlHelper.connectionString, CommandType.StoredProcedure, "Proc_InsertMovementItemWmsInfo", param.ToArray()));
            LogInfo.GetErrorInfoByExcetion("[移库单拆分]添加总数：“" + list.Count + "”,执行成功数“" + result + "”。
 SQL语句：" + strBuilder.ToString());
        }
        return result;
    }
    catch (Exception ee)
    {
        LogInfo.GetErrorInfoByExcetion("异常信息:"+ee.Message);
        return result;
    }
}

2.SQL脚本：

--====================================================
-- Author:Hamilton Tan
-- Create Date:2014-07-22
-- Description:插入MovementItemWmsInfo信息
--====================================================
CREATE PROCEDURE  [dbo].[Proc_InsertMovementItemWmsInfo]
@MovementItemWmsInfoToXML XML
AS
BEGIN
  DECLARE @ERROR INT SET @ERROR = 0;
  DECLARE @rows INT;
  DECLARE @index INT SET @index=1;
  DECLARE @StockSerialNumber INT;
  DECLARE @SkuCode NVARCHAR(200);
  DECLARE @Effect VARCHAR(500);
  DECLARE @PropertityStock INT;
  DECLARE @UnitPrice numeric(18,2);
  DECLARE @shipperid INT;
  DECLARE @Tb_MovementItem TABLE 
     (
        [ID] int IDENTITY(1,1),
         [SkuCode] [nvarchar](200) NULL,
        [MovenmentCode] [nvarchar](200) NULL,
        [Effect] [varchar](500) NULL,
        [Skunum] [int] NULL,
        [PropertityStock] [int] NULL,
        [PromotionCode] [nvarchar](200) NULL,
        [StockoutCount] [int] NULL,
        [StockSerialNumber] [int] NULL,
        [UnitPrice] [numeric](18, 3) NULL,
        [ShipperId] [int] NULL
     );
  --解析移库单MovementItemWmsInfo的XML信息
  IF @MovementItemWmsInfoTOXML IS NOT NULL
  BEGIN
     BEGIN TRY
         INSERT @Tb_MovementItem      
        SELECT
        R.c.value('@SkuCode','nvarchar(200)'),
        R.c.value('@MovenmentCode','nvarchar(200)'),
        R.c.value('@Effect','varchar(500)'),
        R.c.value('@Skunum','int'),
        R.c.value('@PropertityStock','int'),
        R.c.value('@PromotionCode','nvarchar(200)'),
        R.c.value('@StockoutCount','int'),
        R.c.value('@StockSerialNumber','int'),
        R.c.value('@UnitPrice','numeric(18,2)'),
        R.c.value('@ShipperId','int')
        FROM @MovementItemWmsInfoTOXML.nodes('MovementItemWmsInfoTO') R(c) --R为行(Row),c为列(Column),
        /*
         也可以这样写
         SELECT
        Y.x.value('@SkuCode','nvarchar(200)'),
        Y.x.value('@MovenmentCode','nvarchar(200)'),
        Y.x.value('@Effect','varchar(500)'),
        Y.x.value('@Skunum','int'),
        Y.x.value('@PropertityStock','int'),
        Y.x.value('@PromotionCode','nvarchar(200)'),
        Y.x.value('@StockoutCount','int'),
        Y.x.value('@StockSerialNumber','int'),
        Y.x.value('@UnitPrice','numeric(18,2)'),
        Y.x.value('@ShipperId','int')
        FROM @MovementItemWmsInfoTOXML.nodes('MovementItemWmsInfoTO') Y(x) --R为行(Row),c为列(Column),
        */
        /*
        <Rows>
        <Row Name="1" Value="">abcde</Row>
        <Row Name="2" Value="">abcde</Row>
        </Rows>
        
        SELECT
        X.y.value('@Name','nvarchar(200)'), 为1
        X.y.value('Row[1]','nvarchar(200)')为abcde
        FROM @MovementItemWmsInfoTOXML.nodes('MovementItemWmsInfoTO') X(y)
      */
     
    END TRY 
    BEGIN CATCH
       SET @ERROR =-1;
    END CATCH

    --获取总记录数
    SELECT @rows = COUNT(1) FROM  @Tb_MovementItem
    
    --循环处理
    while(@rows>0)
    begin
        select @StockSerialNumber=StockSerialNumber,@SkuCode=SkuCode,@Effect=Effect
        ,@PropertityStock=PropertityStock,@UnitPrice= UnitPrice,@shipperid= ShipperId from @Tb_MovementItem where ID=@index
        
        -- 不能出现StockSerialNumber,SkuCode ,Effect,PropertityStock,UnitPrice,ShipperId相同的记录
        IF NOT EXISTS (select 1 from MovementItemWmsInfo where StockSerialNumber=@StockSerialNumber and SkuCode = @SkuCode and Effect = @Effect 
        and PropertityStock = @PropertityStock and UnitPrice = @UnitPrice and ShipperId = @shipperid)
        BEGIN
            --插入数据
            INSERT INTO [MovementItemWmsInfo]([SkuCode],[MovenmentCode],[Effect],[Skunum],[PropertityStock],[PromotionCode],[StockoutCount],[StockSerialNumber],[UnitPrice],[ShipperId])
              SELECT  [SkuCode],[MovenmentCode],[Effect],[Skunum],[PropertityStock],Replace([PromotionCode],'%','&'),[StockoutCount],[StockSerialNumber],[UnitPrice],[ShipperId] FROM @Tb_MovementItem
         END
         set @rows=@rows-1;
         set @index=@index+1;
     end
 END
 
 select @Error;
 
END