C# 通过SQLXMLBULKLOADLib插入时防止重复
我想知道是否有一种方法可以防止在使用时插入重复的行?我曾尝试将C# 通过SQLXMLBULKLOADLib插入时防止重复,c#,sql-server,xml,sqlxml,C#,Sql Server,Xml,Sqlxml,我想知道是否有一种方法可以防止在使用时插入重复的行?我曾尝试将唯一的非聚集索引添加到SQL表中,但是通过SQLXMLBulkLoad4Class插入失败 所以我的代码看起来像这样 SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class objBL = new SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class(); objBL.ConnectionString = "Provider=sqloledb;server=server;databas
唯一的非聚集索引
添加到SQL表中,但是通过SQLXMLBulkLoad4Class
插入失败
所以我的代码看起来像这样
SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class objBL = new SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class();
objBL.ConnectionString = "Provider=sqloledb;server=server;database=databaseName;integrated security=SSPI";
objBL.ErrorLogFile = "error.xml";
objBL.KeepIdentity = false;
objBL.Execute ("schema.xml","data.xml");
我的xml如下所示:
<?xml version="1.0" encoding="UTF-8"?>
<foo>
<row>
<BICYCLE_NUM>624</BICYCLE_NUM>
<BICYCLE_ORDER>1</BICYCLE_ORDER>
</row>
<row>
<BICYCLE_NUM>623</BICYCLE_NUM>
<BICYCLE_ORDER>2</BICYCLE_ORDER>
</row>
<row>
<BICYCLE_NUM>681</BICYCLE_NUM>
<BICYCLE_ORDER>3</BICYCLE_ORDER>
</row>
<row>
<BICYCLE_NUM>625</BICYCLE_NUM>
<BICYCLE_ORDER>4</BICYCLE_ORDER>
</row>
<row>
<BICYCLE_NUM>680</BICYCLE_NUM>
<BICYCLE_ORDER>5</BICYCLE_ORDER>
</row>
</foo>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:sql="urn:schemas-microsoft-com:mapping-schema">
<xsd:element name="row" sql:relation="BICYCLE"
sql:key-fields="BICYCLE_NUM">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="BICYCLE_NUM" type="xsd:integer" />
<xsd:element name="BICYCLE_ORDER" type="xsd:integer" />
</xsd:sequence>
</xsd:complexType>
</xsd:element>
CREATE TABLE BICYCLE (
BICYCLE_NUM INT ,
BICYCLE_ORDER INT
GO
CREATE UNIQUE NONCLUSTERED INDEX IX_BICYCLE_NUM__BICYCLE_ORDER
ON Wagon (BICYCLE_NUM, BICYCLE_ORDER);
我试图设置CheckConstraints=true
,但结果是一样的
SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class objBL = new SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class
{
ConnectionString = connectionString,
ErrorLogFile = "error.xml",
KeepIdentity = true,
CheckConstraints = true
};
我的问题是如何防止使用SQLXMLBULKLOADLib插入重复项 在探索
SQLXMLBulkLoad4Class
之后,找到了IgnoreDuplicateKeys
属性。因此,我们可以使用IgnoreDuplicateKeys
属性:
SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class objBL = new SQLXMLBULKLOADLib.SQLXMLBulkLoad4Class
{
ConnectionString = connectionString,
ErrorLogFile = "error.xml",
ISQLXMLBulkLoad_IgnoreDuplicateKeys = true,
IgnoreDuplicateKeys = true
};
objBL.Execute(xsdScheme, xmlFileName);
此外,应使用约束
,而不是唯一的非聚集索引
:
CREATE TABLE BICYCLE
(
BICYCLE_NUM INT
, BICYCLE_ORDER INT
, CONSTRAINT PK_BICYCLENUM_BICYCLEORDER PRIMARY KEY
NONCLUSTERED (BICYCLE_NUM, BICYCLE_ORDER)
)
GO
SQLXML非常古老,您应该避免在新项目中使用它。@DavidBrowne Microsoft感谢您的回复。但是,我们可以使用什么替代方法?使用SqlBulkCopy,或者将XML发送到SQL Server并使用.nodes()或OPENXML解析它@DavidBrowne Microsoft如果我们使用
SqlBulkCopy
,那么我们应该通过C
解析xml
文件,然后通过SqlBulkCopy
插入解析的数据?是的。如果文档非常大,则使用XDocument或XmlReader和XDocument的组合解析XML。然后加载一个数据表,如果数据表很大,则安装一个IDataReader。