C # tcp automatic update program,

C # tcp automatic update program,

The. NETTCP automatic update procedure involves the following steps:

Step 1: Enable listening on the server

ServiceHost host; private void button1_Click (object sender, EventArgs e) {host = new ServiceHost (typeof (WCFService. service); host. open (); if (host. state = CommunicationState. opened) {this. button1.Enabled = false; this. button2.Enabled = true;} this. label1.Text = host. state. toString ();}View Code

Step 2: create a service connection on the client.

Step 3: the client selects the Update file (including a Read_File)

# Region select file button private void btn_SelectFiles_Click (object sender, EventArgs e) {dt_updatefile.Clear (); OpenFileDialog File_XuanZe = new OpenFileDialog (); File_XuanZe.Multiselect = true; // multiple files can be selected simultaneously. File_XuanZe.Filter = "Dll files (*. dll) | *. dll | Txt files (*. txt) | *. txt | Access files (*. mdb) | *. mdb | All files (*. *) | *. * "; if (DialogResult. OK = File_XuanZe.ShowDialog () {for (int I = 0; I <bytes; I ++) {byte [] buff = Read_File (File_XuanZe.FileNames [I]); // For the third column, set a textbox as the version number. // For the fourth column, store the path sample in the image folder. the executable file is in dt_updatefile.Rows.Add (I + 1, file_XuanZe.SafeFileNames [I], txt_version.Text, @ "\ image \", buff) ;}} dataGridView1.DataSource = dt_updatefile ;} # endregion # region converts a file to byte [] Read_File public byte [] Read_File (string str_path) {byte [] arrFile = null; // define a byte array using (FileStream fs = new FileStream (str_path, FileMode. open, FileAccess. read) // path is the file path {arrFile = new byte [fs. length]; // defines the length of the byte [] array as the Length fs of the file. read (arrFile, 0, arrFile. length); // read the fs file into the arrFile array. 0 refers to the offset, which is read from 0 and arrFile. length refers to the length to be read, that is, the length of the entire file return arrFile; }}# endregionView Code

Step 4: Upload the updated file after data serialization and Compression

# Region Upload File button private void btn_UpdateFile_Click (object sender, EventArgs e) {DataSet ds = new DataSet (); if (dt_updatefile.DataSet! = Null) {partition (dt_updatefile);} ds. Tables. Add (dt_updatefile); client. Update_System (partition (ds); Load_OldFiles (); dt_updatefile.Clear ();} # endregionView Code

Step 5: The Server accepts the data and writes a file to modify the version information in XML.

# Region receives the update packet Update_System public void Update_System (byte [] byte_files) {DataSet ds = data_serializer.getzipbytessurrow.dataset (byte_files) from the client. // decompress the package into a dataset circular file, modify the corresponding value DataTable dt = ds in Version_Config.xml. tables [0]; foreach (DataRow dr in dt. rows) {string path = System. appDomain. currentDomain. baseDirectory + @ "\" + dr ["Col_Version"] + dr ["Col_File_Path"]; if (! Directory. exists (path) {Directory. createDirectory (path);} if (File. exists (path + dr ["Col_File_Name"]. toString () {// File exists. delete (path + dr ["Col_File_Name"]. toString () ;}# duplicate files are not excluded from region write-back files. // check whether the file exists. If the file exists, change it to the original file name + year, month, day, hour, minute, and second, if the file does not exist, write byte [] buffer = (byte []) dr ["Col_File_Size"]; FileStream fs = new FileStream (path + dr ["Col_File_Name"]. toString (), FileMode. create, FileAccess. write); Stream stream = new MemoryStream (byte []) dr ["Col_File_Size"]); int count = 0; while (count = stream. read (buffer, 0, buffer. length)> 0) {fs. write (buffer, 0, count);} // clear the buffer fs. flush (); // close the stream fs. close (); # endregion // The file is written. Now, the configXml value is modified. update_Xml (dr ["Col_File_Name"]. toString (), dr ["Col_Version"]. toString (), dr ["Col_File_Path"]. toString () ;}# endregionView Code

Step 6: the client detects the version number and updates the program.

# Region download file btn_DownFiles_Click private void btn_DownFiles_Click (object sender, EventArgs e) {System. xml. xmlDocument xDoc = new System. xml. xmlDocument (); xDoc. load (System. windows. forms. application. executablePath + ". config "); System. xml. xmlNode xNode; System. xml. xmlElement xElem1; xNode = xDoc. selectSingleNode ("// appSettings"); xElem1 = (System. xml. xmlElement) xNode. selectSingleNode ("// add [@ key = 've Rsion '] "); DataSet ds = data_serializer.getzipbytessurrow.dataset (client. downFiles (ConfigurationManager. appSettings ["version"]); DataTable dt_file = ds. tables [0]; // linq Double maxSV = Creat_Version (); foreach (DataRow dr in dt_file.Rows) {string path = System. appDomain. currentDomain. baseDirectory + dr ["Col_File_Path"]; if (! Directory. exists (path) {Directory. createDirectory (path);} if (File. exists (path + dr ["Col_File_Name"]. toString () {// File exists. delete (path + dr ["Col_File_Name"]. toString () ;}# duplicate files are not excluded from region write-back files. // check whether the file exists. If the file exists, change it to the original file name + year, month, day, hour, minute, and second, if the file does not exist, write byte [] buffer = (byte []) dr ["Col_File_Size"]; FileStream fs = new FileStream (path + dr ["Col_File_Name"]. toString (), FileMode. create, FileAccess. write); Stream stream = new MemoryStream (byte []) dr ["Col_File_Size"]); int count = 0; while (count = stream. read (buffer, 0, buffer. length)> 0) {fs. write (buffer, 0, count);} // clear the buffer fs. flush (); // close the stream fs. close (); # endregion} // the file has been written. Now, the xml value xElem1.SetAttribute ("value", maxSV. toString (); xDoc. save (System. windows. forms. application. executablePath + ". config ") ;}# endregionView Code

The preceding steps are generally used. The specific information such as classes is not posted in the code. You can download the source code for research.

Defects:

First, the client call does not determine whether the service is enabled.

Second, the file storage path is not complete yet.

Third: I did not think of my brain for the moment.

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