C＃中的XMLWriter问题

Question

My issue is that I can't have the XML's file name be saved based on the text of a given field: here is the line:

XmlTextWriter writer = new XmlTextWriter(@"{0}\ops\op-" + OpName.Text.Replace(" ", "_") + ".xml", 
                                         System.Text.Encoding.UTF8);

The issue I get is that it can't find the path: C:\\[stuff]\\{0}\\op\\op-.xml and if I remove the {0} (in the code) I get can't find C:\\op\\op-.xml

I am needing it to find C:\\[stuff]\\op\\ so it can make the file in that folder.

How could I change this line?

Answer 1

What does {0} represents in your path? XmlTextWriter constructor takes file path, not a formatted string. It would be much more readable if you'd prepare your file path in steps, eg. by utilizing Path.Combine method:

var fileName = string.Format("op-{0}.xml", OpName.Text.Replace(" ", "_"));
var rootDir = /* this would be {0} from your original example */
var filePath = Path.Combine(rootDir, "ops", fileName);

XmlTextWriter writer = new XmlTextWriter(filePath, System.Text.Encoding.UTF8);

Answer 2

string additionalStr=OpName.Text.Replace(" ", "_"); if (string.IsNullOrEmpty(additionalStr)) { return; //or throw error or make default file name depending on the required logic } string directoryPath=String.Format(@"{0}\ops\",dirPrefix); bool isDirectoryExists=Directory.Exists(directoryPath); if (!isDirectoryExists){ //required logic. for example set default directory } string fileName=additionalStr+".xml"; string filePath=Path.Combine(directoryPath,fileName); XmlTextWriter writer = new XmlTextWriter(filePath,System.Text.Encoding.UTF8);