Renaming file name using C#

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I have a task in that i get a mdf file, and i have to attach programatically that file to database and when another file comes i have to detach that and take backup of that and attach new one. My problem is, by taking backup i want to give names of that file in incremental order like backup1, backup2.....and so on. I need help how can i give names in incremental order programatically.

Posted 16-Jun-11 2:43am

sandeep.somvanshi83

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Wayne Gaylard · Answer 1 · 2011-06-16T02:54:00

I would keep an int variable in the Application Settings, which I would use and increment every time I needed to backup. Something like this (where Properties.Settings.Default.fileCount is the variable stored in Application Settings

C#

int currentFileNumber = Properties.Settings.Default.fileCount;
           string newFileName = String.Format("YourFileName{0}.mdb", currentFileNumber + 1);
           File.Copy(string.Format("YourFileName{0}.mdb", currentFileNumber), string.Format("YourFileName{0}.mdb", currentFileNumber + 1));
           Properties.Settings.Default.fileCount = currentFileNumber + 1;
           Properties.Settings.Default.Save();

Hope this helps

Kim Togo · Answer 2 · 2011-06-16T02:52:00

Solution 3

Use Directory Class[^] and Directory.EnumerateFiles[^] to find all files in the folder with "backup*".

Use LINQ to sort and get the MAX file count name. Like

C#

var file = (from file in Directory.EnumerateFiles(@"c:\archives1\library\", "backup*.txt")
            order by file
            select file).LastOrDefault();

And then use File class[^] file operation.

Posted 16-Jun-11 2:52am

Kim Togo

v3

Comments

Sergey Alexandrovich Kryukov 16-Jun-11 14:34pm

Sure, a 5.
--SA

Kim Togo 16-Jun-11 14:39pm

Thanks SA

amit28august · Answer 3 · 2011-06-16T02:50:00

If want to do that then u can do that by global variable or if u want it to exist after re-executing the application then u can do it by keeping value in xml file

C#

DataSet ds = new DataSet();

ds.ReadXml("XMLFile1.xml");
int dfs = int.Parse(ds.Tables[0].Rows[0]["value"].ToString());

// Create a new XmlTextWriter instance
XmlTextWriter writer = new XmlTextWriter("XMLFile1.xml", System.Text.Encoding.UTF8);

// start writing!
writer.WriteStartDocument();
writer.WriteStartElement("Visit");
writer.WriteStartElement("Count");
writer.WriteElementString("value", (dfs + 1).ToString());
writer.WriteEndElement();
writer.WriteEndElement();
writer.WriteEndDocument();
writer.Close();

Here is the XML

XML

<?xml version="1.0" encoding="UTF-8"?>
<Visit>
  <Count>
    <text>Visitor</text>
    <value>222</value>
  </Count>
</Visit>

BobJanova · Answer 4 · 2011-06-16T02:46:00

Solution 1

File.Move[^]
For taking the backup (i.e. copying to a new name)
File.Copy[^]

Posted 16-Jun-11 2:46am

BobJanova