c#: Windows delete a file as soon as created

Question

I'm trying to write xml file starting from JSON data using c#. I see this strange issue: file is removed as soon as created. If I debug the code, I see that file is alive until the using closing statement, after this line, file will be deleted.

Could anyone help me?

Below there is my code:

            string path = "c:\\temp\\";
        // Write JSON to XML file
        string json = "{\"WorkOrderId\":\"WOAA_002_FQjjjjjjjj\",\"WorkOrderName\":\"OP_AAA001\",\"InternalKey\":\"WOAA_002_FQ@iKey@OP_AAA001\",\"parameterDataList\":[{\"Description\":\"Valore PR\",\"InspectionType\":\"Numeric\",\"Value\":\"\",\"LowerLimit\":null,\"NominalValue\":null,\"UpperLimit\":null,\"UoM\":\"n/a\",\"Skill\":true,\"Sequence\":\"1\",\"ParameterValueALTDatetime\":\"\"},{\"Description\":\"Valore PR\",\"InspectionType\":\"String\",\"Value\":\"test\",\"LowerLimit\":null,\"NominalValue\":null,\"UpperLimit\":null,\"UoM\":\"n/a\",\"Skill\":true,\"Sequence\":\"2\",\"ParameterValueALTDatetime\":\"\"}]}";


        XmlDocument uiXmlDoc = JsonConvert.DeserializeXmlNode(json, "root");

        // Get data for compose filename
        string woId = "WOAA_PAOLO";
        string operation = "OP_AAA001";
        string dcId = "TK-18-0000000332";

        if (!path.EndsWith("\\")) path += "\\";

        //Compose filename
        string fileName = path + woId + "@" + operation + "@" + dcId + ".xml";


        //Save the xml and then cleanup
        XmlWriterSettings settings = new XmlWriterSettings { Indent = true };


        using (StreamWriter outStream = new StreamWriter(@fileName))
        {
            XmlWriter writer = XmlWriter.Create(outStream, settings);
            uiXmlDoc.Save(writer);

        }

Answer 1

我解决了这个问题，问题出在使用c：/ temp目录，如果我使用它可以工作的另一个目录，我认为这可能是安全性或权限问题。

Answer 2

I wouldn't use the root of the c drive, windows security tends to stop users from writing there without admin credentials. Use the environmental variable %temp%, it'll put the file in the user's temp folder. Here's the link for getting the environmental variable in C#

https://docs.microsoft.com/en-us/dotnet/api/system.environment.getenvironmentvariable?view=netframework-4.7.2

The other advantage is you don't have to worry about the folder not being there and it causing an error.