C # Operations Clipboard read the data instances in the Clipboard

Source: Internet
Author: User
Tags string format

The example in this article describes how C # operations Clipboard read data in the Clipboard. Share to everyone for your reference. The specific analysis is as follows:

1 Customize a class and ensure it is serializable: Implement the ISerializable interface, or use the [Serializable] tag (if there is a parent class, the parent class will also need to be marked; you can [NonSerialized ()] mark a field in the class that you do not want to serialize)

2 registering a custom data format: Calling a static method Dataformats.getformat ()

3 Save data to Clipboard: Using the IDataObject interface, create a data object and set the data; call the Clipboard.setdataobject () method

4 Get data from clipboard: Call the GetDataPresent () of the DataObject instance to ensure that the data format is compatible with the application; Call IDataObject's GetData () method to get the data

Sample programs:

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26-27--28 29---30 31--32 33 34 35 36 37 38-39 40 41 42 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 5 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108-109 Using System; Using System.Collections.Generic; Using System.ComponentModel; Using System.Data; Using System.Drawing; Using System.Linq; Using System.Text; Using System.Windows.Forms; Using System.Runtime.Serialization.Formatters.Binary; namespace _clipboardtest_ {public partial class Form1:form {[System.Runtime.InteropServices.DllImport ("user32")] Priv Ate static extern IntPtr SetClipboardViewer (INTPTR hwnd); [System.Runtime.InteropServices.DllImport ("user32")] private static extern IntPtr Changeclipboardchain (INTPTR hwnd, IntPtr hwndnext); [System.Runtime.InteropServices.DllImport ("user32")] private static extern int SendMessage (INTPTR hwnd, int wmsg, IntPtr WParam, IntPtr lParam); const int wm_drawclipboard = 0x308; const int wm_changecbchain = 0x30d; Public Form1 () {InitializeComponent ();} private void Form1_Load (object sender, EventArgs e) {//Get the next window handle to the observation chain NEXTCLIPHW nd = SetClipboardViewer (this. Handle); } protected override void WndProc (ref System.Windows.Forms.Message m) { Switch (m.msg) {case Wm_drawclipboard://Pass Wm_drawclipboard message to the window in the next observation chain SendMessage (Nextcliphwnd, m.msg, M.wparam, M . LParam); IDataObject idata = Clipboard.getdataobject (); Detect text if (Idata.getdatapresent (dataformats.text) | idata.getdatapresent (Dataformats.oemtext)) { This.richTextBox1.Text = (String) idata.getdata (Dataformats.text); }//Detect image if (Idata.getdatapresent (Dataformats.bitmap)) {pictureBox1.Image = Clipboard.getimage (); MyItem Item = new myitem (); Item. CopyToClipboard (); //Detect the custom type if (Idata.getdatapresent typeof (myitem). FullName)) {//MyItem item = (myitem) idata.getdata (typeof (myitem). FullName); MyItem item = GetFromClipboard (); if (item!= null) {This.richTextBox1.Text = Item. ItemName; }} break; Default:base. WndProc (ref m); Break } private void Form1_Closed (object sender, System.EventArgs e) {//Deletes this observation window from the observation chain (first argument: handle to the window to be deleted;//second argument: Handle to the next window in the watch chain ) Changeclipboardchain (this. Handle, Nextcliphwnd); Pass the change message Wm_changecbchain message to the window in the next observation chain SendMessage (Nextcliphwnd,Wm_changecbchain, this. Handle, Nextcliphwnd); } IntPtr Nextcliphwnd; Protected static myitem GetFromClipboard () {myitem item = NULL; IDataObject dataobj = Clipboard.getdataobject (); string format = typeof (myitem). FullName; if (dataobj.getdatapresent (format)) {item = dataobj.getdata (format) as myitem;} return item; } [Serializable] public class MyItem {public myitem () {itemname = ' This is a Custom Item ';} public string ItemName { get {return itemname;}} private string ItemName;   public void CopyToClipboard () {Dataformats.format Format = Dataformats.getformat (typeof (myitem). FullName); IDataObject dataobj = new DataObject (); Dataobj.setdata (format. Name, False, this); Clipboard.setdataobject (Dataobj, false); } } }

I hope this article will help you with your C # programming.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.