using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;namespace WindowsFormsApp25
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){#region 单独设置textBox1.AllowDrop = true;//设置控件AllowDrop的属性textBox2.AllowDrop = true;textBox1.DragEnter += C_DragEnter;//设置控件的DragEnter效果textBox2.DragEnter += C_DragEnter;#endregion#region 批量设置//foreach (Control c in this.Controls)//{//    if (c is TextBox)//    {//        c.AllowDrop = true;//        c.DragEnter += C_DragEnter;//    }//}#endregiontextBox1.DragDrop += TextBox1_DragDrop;}private void TextBox1_DragDrop(object sender, DragEventArgs e){string html = GetHtmlContent(e.Data);string txt = GetStringContent(e.Data);}private void C_DragEnter(object sender, DragEventArgs e){//设置控件的DragEnter效果e.Effect = DragDropEffects.All;}/// <summary>/// 获得网页格式的信息/// </summary>/// <param name="data"></param>/// <returns></returns>public static string GetHtmlContent(IDataObject data){//先判断数据是否为html格式的数据if (data.GetDataPresent(DataFormats.Html)){return data.GetData(DataFormats.Html).ToString();}elsereturn "";}/// <summary>/// 获得文本内容/// </summary>/// <param name="data"></param>/// <returns></returns>public static string GetStringContent(IDataObject data){//先判断数据是否为html格式的数据if (data.GetDataPresent(DataFormats.StringFormat)){return data.GetData(DataFormats.StringFormat).ToString();}elsereturn "";}}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;namespace WindowsFormsApp25
{class RegexObject{public static Regex reglink = new Regex(@"[a-z]+\x3A//[^\x27\x22\x20\x0A\x0D]+", RegexOptions.IgnoreCase);public static Regex regcont = new Regex(@"\x3C\x21\x2D\x2DStartFragment\x2D\x2D\x3E(?<cont>(\w|\W)*?)\x3C\x21\x2D\x2DEndFragment\x2D\x2D\x3E", RegexOptions.IgnoreCase);public static Regex reghtml = new Regex(@"<[^>]*>", RegexOptions.IgnoreCase);public static Regex regimg = new Regex(@"<\W*img[^>]+src\W*\x3D[\x27\x22\W]*(?<img>(\w|\W)*?)[\x27\x22\x20\x3E]", RegexOptions.IgnoreCase);public static Regex regsource = new Regex(@"sourceURL\x3A(?<source>[^\r\n]*)[\r\n]", RegexOptions.IgnoreCase);public static Regex regsup = new Regex(@"\x3Csup\x3E", RegexOptions.IgnoreCase);public static Regex regsub = new Regex(@"\x3Csub\x3E", RegexOptions.IgnoreCase);public static Regex regsupsubend = new Regex(@"\x3C/su(b|p)\x3E", RegexOptions.IgnoreCase);public static Regex regemail = new Regex(@"([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,5})+", RegexOptions.IgnoreCase);public static Regex regehttp = new Regex(@"((http|https)://)?(www\.)?[A-Za-z0-9]+\.(com|net|cn|com\.cn|com\.net|net\.cn)", RegexOptions.IgnoreCase);public static Regex regdate = new Regex(@"((?<!\d)((\d{2,4}(\.|年|\/|\-))((((0?[13578]|1[02])(\.|月|\/|\-))((3[01])|([12][0-9])|(0?[1-9])))|(0?2(\.|月|\/|\-)((2[0-8])|(1[0-9])|(0?[1-9])))|(((0?[469]|11)(\.|月|\/|\-))((30)|([12][0-9])|(0?[1-9]))))|((([0-9]{2})((0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))(\.|年|\/|\-))0?2(\.|月|\/|\-)29))日?(?!\d))");public static Regex regDomain = new Regex(@"(?<mydomain>(?<Protocol>\w+):\/\/(?<Domain>[\w.\x2D]+))\/?\S*", RegexOptions.IgnoreCase);public static Regex regWWW = new Regex(@"(?<url>http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?)", RegexOptions.IgnoreCase);//((http|https)://)?(www\.)?[A-Za-z0-9]+\.(com|net|cn|com\.cn|com\.net|net\.cn)public static Regex regyear = new Regex(@"\d{4}");public static string GetWWW(string txt){return regWWW.Match(txt).Value;}public static string GetYear(string txt){return regyear.Match(txt).Value;}public static string Getdomain(string url){return regDomain.Match(url).Groups["Domain"].Value;}/// <summary>/// 截取日期/// </summary>/// <param name="txt"></param>/// <returns></returns>public static string GetDate(string txt){return regdate.Match(txt).Value.ToString();}/// <summary>/// 只获得如https://www.baidu.com的部分/// </summary>/// <param name="txt"></param>/// <returns></returns>public static string GetHttp(string txt){return regehttp.Match(txt).Value.ToString();}/// <summary>/// 获取当前拖拽的内容（拖拽文本）/// </summary>/// <param name="text"></param>/// <returns></returns>public static string GetText(string text){string cont = regcont.Match(text).Groups["cont"].Value;string r = reghtml.Replace(cont, "").Trim();return r;}/// <summary>/// 获得链接字段的网址（将要打开的网页）/// </summary>/// <param name="text"></param>/// <returns></returns>public static string GetLink(string text){string cont = regcont.Match(text).Groups["cont"].Value;string r = reglink.Match(cont).Value;return r;}/// <summary>/// 获得链接字段的当前网址（现在的网址）/// </summary>/// <param name="text"></param>/// <returns></returns>public static string GetRefPage(string text){return regsource.Match(text).Groups["source"].Value.Trim();}/// <summary>/// 获取网址信息（包含version,源网址和当前拖拽链接的网址信息）/// </summary>/// <param name="text"></param>/// <returns></returns>public static string ReplaceSubSup(string text){text = regsup.Replace(text, "(↑");text = regsub.Replace(text, "(↓");text = regsupsubend.Replace(text, ")").Trim();return text;}}
}