无法导出到 XML

Question

我有一个名为Sort.sdf 的sql 紧凑型数据库连接到我的网站，并带有一个名为“sort”的表。我需要将表中的所有记录导出到 XML 文件，但我不断收到以下错误并且找不到解决方案：

A network-related or instance-specific error occurred while 
establishing a connection to SQL Server. The server was not 
found or was not accessible. 

Verify that the instance name is correct and that SQL Server
is configured to allow remote connections. (provider: Named 
Pipes Provider, error: 40 - Could not open a connection to 
SQL Server)

我已经使用相同的连接成功地将数据插入到数据库中，所以我认为那里没有问题。

SqlCeConnection conn = new SqlCeConnection("Data Source=|DataDirectory|Sort.sdf");
conn.Open();

DataSet ds = new DataSet();
System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter("Select * from Sort", conn.ConnectionString);
da.Fill(ds); //error on this line

ds.WriteXml(@"c:\temp\output.xml", XmlWriteMode.WriteSchema);

Answer 1

SqlCeConnection cnn = new SqlCeConnection("Data Source=|DataDirectory|Sort.sdf");
cnn.Open();
SqlCommand cmd = new SqlCommand("select * from  sort", cnn);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds=new DataSet();
da.Fill(ds);

StreamWriter xmldoc=new StreamWriter(Server.MapPath("~/Testdo.xml"), false); 
ds.WriteXml(xmldoc);
xmldoc.Close();