Question

我遇到了SqlBulkCopy（在c＃，框架4.5.1中）的问题，其中有效的XML字符串导致错误System.Data.SqlClient.SqlException：{“XML解析：第1行，字符29，字符串文字期待“}”

表格是......

CREATE TABLE [dbo].[JobManager_BigTextTest](
[PKID] [int] IDENTITY(1,1) NOT NULL,
[BigXML] [xml] NOT NULL, PK_JobManager_BigTextTest] PRIMARY KEY CLUSTERED 
(
    [PKID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [Data]
) ON [Data] TEXTIMAGE_ON [Data]

XML的SQL插入（工作正常）是......

INSERT INTO JobManager_BigTextTest
(
    BigXML
)
VALUES
(
    '<ArrayOfTriggerEvent xmlns="http://schemas.datacontract.org/2004/07/RRD.JobManager.AutomatedWorkScheduler.Triggers" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><TriggerEvent i:type="a:ScheduleEvent" xmlns:a="http://schemas.datacontract.org/2004/07/RRD.JobManager.AutomatedWorkScheduler.Triggers.Events"><a:Schedule i:type="b:IncrementalSchedule" xmlns:b="http://schemas.datacontract.org/2004/07/RRD.JobManager.AutomatedWorkScheduler.Schedules"><b:DaysOfMonth xmlns:c="http://schemas.microsoft.com/2003/10/Serialization/Arrays"/><b:DaysOfWeek xmlns:c="http://schemas.datacontract.org/2004/07/System"/><b:Frequency>Daily</b:Frequency><b:LastDayOfMonth>false</b:LastDayOfMonth><b:LastExecuted i:nil="true"/><b:LastModified>2014-08-21T14:40:30.6116736-05:00</b:LastModified><b:EndTime i:nil="true"/><b:Increment>PT5M</b:Increment><b:StartTime>PT0S</b:StartTime></a:Schedule></TriggerEvent><TriggerEvent i:type="a:ScheduleEvent" xmlns:a="http://schemas.datacontract.org/2004/07/RRD.JobManager.AutomatedWorkScheduler.Triggers.Events"><a:Schedule i:type="b:SpecificSchedule" xmlns:b="http://schemas.datacontract.org/2004/07/RRD.JobManager.AutomatedWorkScheduler.Schedules"><b:DaysOfMonth xmlns:c="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><c:int>8</c:int><c:int>11</c:int><c:int>24</c:int></b:DaysOfMonth><b:DaysOfWeek xmlns:c="http://schemas.datacontract.org/2004/07/System"/><b:Frequency>Monthly</b:Frequency><b:LastDayOfMonth>false</b:LastDayOfMonth><b:LastExecuted i:nil="true"/><b:LastModified>2014-08-21T14:40:30.6116736-05:00</b:LastModified><b:StartTimes xmlns:c="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><c:duration>PT11H</c:duration><c:duration>PT11H30M</c:duration><c:duration>PT13H30M</c:duration></b:StartTimes></a:Schedule></TriggerEvent></ArrayOfTriggerEvent>'
)

我用来创建空DataTable的c＃代码是......

public static DataTable GetDataTableFromSqlDestination(string tableName)
{
    tableName = MakeInjectionProof(tableName); // error if injection discovered
    var dataTable = new DataTable();
    var query = $"SELECT * FROM [{tableName}] WHERE 1 = 0";

    using (var connection = new SqlConnection("my_connection"))
    using (var command = new SqlCommand(query, connection))
    {
        command.CommandTimeout = connection.ConnectionTimeout;
        command.CommandType = CommandType.Text;
        connection.Open();

        var da = new SqlDataAdapter(command);

        da.FillSchema(dataTable, SchemaType.Mapped);

        connection.Close();

        dataTable.PrimaryKey = null; // strip off primary key
        dataTable.Columns.Remove("PKID");
    }

    return dataTable;
}

向DataTable添加一行（或多行）后，执行批量复制的c＃方法被调用...

public static void BulkCopyProcessChunk
(
    string tableName,
    DataTable dataTable,
    SqlConnection connection,
    SqlTransaction transaction
)
{
    using (var sbc = new SqlBulkCopy(connection, SqlBulkCopyOptions.Default, transaction))
    {
        sbc.BulkCopyTimeout = 0; // Indefinite time out
        sbc.DestinationTableName = tableName;

        sbc.BatchSize = dataTable.Rows.Count;

        foreach (DataColumn r in dataTable.Columns)
        {
            sbc.ColumnMappings.Add(r.ColumnName, r.ColumnName);
        }

        sbc.WriteToServer(dataTable); // <--- error occurs here
    }
}

XML DataColumn（BigXML）的数据类型为System.String，最大长度为-1。谁能告诉我这里发生了什么？

Answer 1

错误消息指向第1行，字符29 ...

此时，default-namespace-attribute需要一个字符串文字......您将以double qoutes提供名称空间。所以一切似乎都没问题，但是：

有几个帖子（e.g. this one）指出与SqlBulkCopy和双qoutes相关的问题。

您可以尝试以下操作：

使用单个qoutes而不是doubled：<ArrayOfTriggerEvent xmlns='Your namespace' NextAttr='SomeVAlue' ...
尝试逃避"字符。通常，这可以通过将符号加倍（xmlns=""Your namespace""）或使用转义字符来完成。试试\"，^"或反引号（`"）......

更多information on Escape Characters

SqlBulkCopy出错：字符无效但XML字符串似乎有效

1 个答案: