Question

我使用以下代码在xml列中的sql数据库中保存了一个数据集。

XmlDataDocument dd = new XmlDataDocument(dataset);

并使用

将此xml文档作为sql参数传递

param.value = new XmlNodeReader(dd);

XML就像

<NewDataSet><SubContractChangeOrders><AGCol>1</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>006</Contract_x0020_Number><ContractID>30</ContractID><ChangeOrderID>211</ChangeOrderID><Amount>0.0000</Amount><Udf_CostReimbursableFlag>false</Udf_CostReimbursableFlag><Udf_CustomerCode /><Udf_SubChangeOrderStatus /></SubContractChangeOrders><SubContractChangeOrders><AGCol>2</AGCol><SCO_x0020_Number>002</SCO_x0020_Number><Contract_x0020_Number>006</Contract_x0020_Number><ContractID>30</ContractID><ChangeOrderID>212</ChangeOrderID><Amount>0.0000</Amount><Udf_CostReimbursableFlag>false</Udf_CostReimbursableFlag></SubContractChangeOrders><SubContractChangeOrders><AGCol>3</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>111</Contract_x0020_Number><ContractID>87</ContractID><ChangeOrderID>12</ChangeOrderID><Amount>300.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>4</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>222</Contract_x0020_Number><ContractID>80</ContractID><ChangeOrderID>6</ChangeOrderID><Amount>100.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>5</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>777</Contract_x0020_Number><ContractID>79</ContractID><ChangeOrderID>5</ChangeOrderID><Amount>200.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>6</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>786</Contract_x0020_Number><ContractID>77</ContractID><ChangeOrderID>3</ChangeOrderID><Amount>100.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>7</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>787</Contract_x0020_Number><ContractID>78</ContractID><ChangeOrderID>4</ChangeOrderID><Amount>500.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>8</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con 009</Contract_x0020_Number><ContractID>219</ContractID><ChangeOrderID>78</ChangeOrderID><Amount>9000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>9</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con 010</Contract_x0020_Number><ContractID>220</ContractID><ChangeOrderID>79</ChangeOrderID><Amount>13000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>10</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con 012</Contract_x0020_Number><ContractID>222</ContractID><ChangeOrderID>83</ChangeOrderID><Amount>2300.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>11</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con 020</Contract_x0020_Number><ContractID>226</ContractID><ChangeOrderID>86</ChangeOrderID><Amount>5400.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>12</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con 021</Contract_x0020_Number><ContractID>227</ContractID><ChangeOrderID>87</ChangeOrderID><Amount>2300.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>13</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con001</Contract_x0020_Number><ContractID>208</ContractID><ChangeOrderID>72</ChangeOrderID><Amount>3000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>14</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con002</Contract_x0020_Number><ContractID>209</ContractID><ChangeOrderID>73</ChangeOrderID><Amount>400.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>15</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con003</Contract_x0020_Number><ContractID>210</ContractID><ChangeOrderID>74</ChangeOrderID><Amount>6000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>16</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con004</Contract_x0020_Number><ContractID>211</ContractID><ChangeOrderID>75</ChangeOrderID><Amount>9000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>17</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Con005</Contract_x0020_Number><ContractID>213</ContractID><ChangeOrderID>76</ChangeOrderID><Amount>17000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>18</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>Cont001</Contract_x0020_Number><ContractID>228</ContractID><ChangeOrderID>89</ChangeOrderID><Amount>2000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>19</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>PUR001</Contract_x0020_Number><ContractID>229</ContractID><ChangeOrderID>88</ChangeOrderID><Amount>1000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>20</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>PUR002</Contract_x0020_Number><ContractID>230</ContractID><ChangeOrderID>90</ChangeOrderID><Amount>3000.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>21</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>SC-002</Contract_x0020_Number><ContractID>2</ContractID><ChangeOrderID>7</ChangeOrderID><Amount>200.0000</Amount></SubContractChangeOrders><SubContractChangeOrders><AGCol>22</AGCol><SCO_x0020_Number>001</SCO_x0020_Number><Contract_x0020_Number>SC-004</Contract_x0020_Number><ContractID>7</ContractID><ChangeOrderID>65</ChangeOrderID><Amount>1000.0000</Amount></SubContractChangeOrders></NewDataSet>

我正在尝试按如下方式阅读

using (SqlConnection con = new SqlConnection("Server=#####;Initial Catalog=#####;User ID=####;Pwd=########"))
        {
            using (SqlCommand com = new SqlCommand("select * from dbo.tbl_#####", con))
            {
                using (SqlDataAdapter ada = new SqlDataAdapter(com))
                {
                    ada.Fill(dt);
                    MemoryStream ms = new MemoryStream();
                    object contractXML1 = dt.Rows[0]["SCOXML1"]; 
                    System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    bf.Serialize(ms, contractXML1);
                    ms.Seek(0, SeekOrigin.Begin);
                    ds.ReadXml(ms);
                }
            }
        }

我收到以下错误

根级别的数据无效。第1行，第6位。

有什么想法吗？

更新

我将代码更改为以下内容。我能够获得数据集的结构，其中包含所有表格。但不是数据。

using (SqlConnection con = new SqlConnection("Server=###;Initial Catalog=####;User ID=###;Pwd=######"))
        {
            using (SqlCommand com = new SqlCommand("select * from dbo.tbl_####", con))
            {
                using (SqlDataAdapter ada = new SqlDataAdapter(com))
                {
                    ada.Fill(dt);
                    MemoryStream ms = new MemoryStream();
                    object contractXML1 = dt.Rows[0]["SCOXML1"];
                    object schema = dt.Rows[0]["xmlSchemaHistory"];
                    XmlSerializer xs = new XmlSerializer(typeof(object));
                    xs.Serialize(ms, contractXML1);
                    ms.Position = 0;
                    xDoc.Load(ms);
                    xDocSc.LoadXml(schema.ToString());
                    ds.ReadXmlSchema(new XmlNodeReader(xDocSc));
                    ds.ReadXml(new XmlNodeReader(xDoc));
                }
            }
        }

但是底层的xml文档正在拥有数据。有什么想法吗？

NLV

Answer 1

为什么使用二进制格式化程序？事实上，你为什么要序列化？您的XML列不是使用SQL Server XML数据类型吗？如果是这样，那么您需要使用SqlXml数据类型检索数据。

之前我从未使用过XML列和 DataTables。我通常会为此目的使用SqlDataReader。但是，我可以给你一个提示：一旦你有一个SqlXml对象，就可以得到XmlReader。获得XmlReader后，即可：

DataTable dt = new DataTable("tableName");
dt.ReadXml(xmlReader);

请参阅“ReadXml(XmlReader)”和“SqlXml.CreateReader Method”。

Answer 2

这是一个黑暗中的镜头，但您的XML可能在XML中有一个字节顺序标记（BOM），而二进制格式化程序无法在不指定编码的情况下正确处理它。如果是这种情况，那么您可能必须先将XML加载到编码流中。

Dataset.ReadXml（） - 给定编码中的字符无效

2 个答案: