C# 如何以编程方式更新嵌入式SQL连接的命令属性

使用c openxml-我试图打开一个excel文件，绑定到它的connection.xml流，并更新嵌入式SQL查询。我能够成功地用连接/命令节点替换单个字符序列，但尝试显式设置命令属性，即node.attribute[command].Value=select*from。。。。正在导致一个已损坏的

xmlDoc.Load(wkb.WorkbookPart.ConnectionsPart.GetStream());

csNode = xmlDoc.SelectSingleNode("*/*/*[@connection]");

csNode.Attributes["command"].Value = Regex.Replace(csNode.Attributes["command"].Value,        @"\(\[\w*\].\[\w*\].\[\w*\].\[\w*\].*\)", "(" + subQry + ")", RegexOptions.Multiline);

xmlDoc.Save(wkb.WorkbookPart.ConnectionsPart.GetStream()); 

wkb.Close();

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不确定这是否是解决此问题的唯一方法，但我可以通过删除原始connections.xml流并创建/附加一个具有正确值的新连接到工作簿来更正此问题

 //select connections node from loaded xml Excel
 csNode = xmlDoc.SelectSingleNode("*/*/*[@connection]");

 //store original node values
 oldConnValue = csNode.Attributes["connection"].Value;
 oldCommValue = csNode.Attributes["command"].Value;

 //delete existing ConnectionsPart - to ensure that bleed-over data is not present
 wkb.WorkbookPart.DeletePart(wkb.WorkbookPart.ConnectionsPart);

 //create a replacement ConnectionsPart
 wkb.WorkbookPart.AddNewPart<ConnectionsPart>();

 csNode.Attributes["connection"].Value = oldConnValue; //reassign existing connection value
 csNode.Attributes["command"].Value = baseQry;         //assign new query

 //save changes to stream
 xmlDoc.Save(wkb.WorkbookPart.ConnectionsPart.GetStream());