當(dāng)前位置：首頁 > 前端技术 > vue >内容正文

vue

vue通过class获取dom_.NET Core通过Json或直接获取图形验证码（务必收藏备用）

發(fā)布時間：2023/12/15 vue 35 豆豆

生活随笔收集整理的這篇文章主要介紹了 vue通过class获取dom_.NET Core通过Json或直接获取图形验证码（务必收藏备用）小編覺得挺不錯的,現(xiàn)在分享給大家,幫大家做個參考.

(給DotNet加星標(biāo)，提升.Net技能)

轉(zhuǎn)自：殷慈航cnblogs.com/jiyuwu/p/11803979.html

很多人寫的博客大家看了會一知半解，不知道怎么用，應(yīng)該引用什么類庫或者代碼不全，這樣很多小白很是頭疼，尤其是嘗新技術(shù)更是如此。我們這邊不止告訴你步驟，而且還提供開源demo。

隨著時間的推移，我們的demo庫會日益強大請及時收藏

GitHub：https://github.com/jiyuwu/TemplateCore

一、首先你需要Nuget引用類庫

Install-Package ZKWeb.System.Drawing -Version 4.0.1

二、創(chuàng)建公共類VerifyCodeHelper和CommonHelper

1、CommonHelper中添加圖形處理方法

#region 驗證碼
public static byte[] Bitmap2Byte(Bitmap bitmap){
using (MemoryStream stream = new MemoryStream())
{
bitmap.Save(stream, ImageFormat.Jpeg);
byte[] data = new byte[stream.Length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(data, 0, Convert.ToInt32(stream.Length));
return data;
}
}
#endregion
public static string CodeJson(string code, string msg){
return "{\"code\":\"" + code + "\",\"msg\":\"" + msg + "\"}";
}

2、VerifyCodeHelper添加圖形處理方法

public class VerifyCodeHelper
{
#region 單例模式
//創(chuàng)建私有化靜態(tài)obj鎖
private static readonly object _ObjLock = new object();
//創(chuàng)建私有靜態(tài)字段，接收類的實例化對象
private static VerifyCodeHelper _VerifyCodeHelper = null;
//構(gòu)造函數(shù)私有化
private VerifyCodeHelper() { }
//創(chuàng)建單利對象資源并返回
public static VerifyCodeHelper GetSingleObj(){
if (_VerifyCodeHelper == null)
{
lock (_ObjLock)
{
if (_VerifyCodeHelper == null)
_VerifyCodeHelper = new VerifyCodeHelper();
}
}
return _VerifyCodeHelper;
}
#endregion

#region 生產(chǎn)驗證碼
public enum VerifyCodeType { NumberVerifyCode, AbcVerifyCode, MixVerifyCode };

///
/// 1.數(shù)字驗證碼
///
///
///
private string CreateNumberVerifyCode(int length){
int[] randMembers = new int[length];
int[] validateNums = new int[length];
string validateNumberStr = "";

//生成起始序列值
int seekSeek = unchecked((int)DateTime.Now.Ticks);
Random seekRand = new Random(seekSeek);
int beginSeek = seekRand.Next(0, Int32.MaxValue - length * 10000);
int[] seeks = new int[length];
for (int i = 0; i < length; i++)
{
beginSeek += 10000;
seeks[i] = beginSeek;
}
//生成隨機數(shù)字
for (int i = 0; i < length; i++)
{
Random rand = new Random(seeks[i]);
int pownum = 1 * (int)Math.Pow(10, length);
randMembers[i] = rand.Next(pownum, Int32.MaxValue);
}
//抽取隨機數(shù)字
for (int i = 0; i < length; i++)
{
string numStr = randMembers[i].ToString();
int numLength = numStr.Length;
Random rand = new Random();
int numPosition = rand.Next(0, numLength - 1);
validateNums[i] = Int32.Parse(numStr.Substring(numPosition, 1));
}
//生成驗證碼
for (int i = 0; i < length; i++)
{
validateNumberStr += validateNums[i].ToString();
}
return validateNumberStr;
}
///
/// 2.字母驗證碼
///
/// 字符長度
/// 驗證碼字符
private string CreateAbcVerifyCode(int length){
char[] verification = new char[length];
char[] dictionary = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',

'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
};
Random random = new Random();
for (int i = 0; i < length; i++)
{
verification[i] = dictionary[random.Next(dictionary.Length - 1)];
}
return new string(verification);
}
///
/// 3.混合驗證碼
///
/// 字符長度
/// 驗證碼字符
private string CreateMixVerifyCode(int length){
char[] verification = new char[length];
char[] dictionary = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
};
Random random = new Random();
for (int i = 0; i < length; i++)
{
verification[i] = dictionary[random.Next(dictionary.Length - 1)];
}
return new string(verification);
}
///
/// 產(chǎn)生驗證碼(隨機產(chǎn)生4-6位)
///
/// 驗證碼類型：數(shù)字，字符，符合
///
public string CreateVerifyCode(VerifyCodeType type){
string verifyCode = string.Empty;
Random random = new Random();
int length = random.Next(4, 6);
switch (type)
{
case VerifyCodeType.NumberVerifyCode:
verifyCode = GetSingleObj().CreateNumberVerifyCode(length);
break;
case VerifyCodeType.AbcVerifyCode:
verifyCode = GetSingleObj().CreateAbcVerifyCode(length);
break;
case VerifyCodeType.MixVerifyCode:
verifyCode = GetSingleObj().CreateMixVerifyCode(length);
break;
}
return verifyCode;
}
#endregion

#region 驗證碼圖片
///
/// 驗證碼圖片 => Bitmap
///
/// 驗證碼
/// 寬
/// 高
/// Bitmap
public Bitmap CreateBitmapByImgVerifyCode(string verifyCode, int width, int height){
Font font = new Font("Arial", 14, (FontStyle.Bold | FontStyle.Italic));
Brush brush;
Bitmap bitmap = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bitmap);
SizeF totalSizeF = g.MeasureString(verifyCode, font);
SizeF curCharSizeF;
PointF startPointF = new PointF(0, (height - totalSizeF.Height) / 2);
Random random = new Random(); //隨機數(shù)產(chǎn)生器
g.Clear(Color.White); //清空圖片背景色
for (int i = 0; i < verifyCode.Length; i++)
{
brush = new LinearGradientBrush(new Point(0, 0), new Point(1, 1), Color.FromArgb(random.Next(255), random.Next(255), random.Next(255)), Color.FromArgb(random.Next(255), random.Next(255), random.Next(255)));
g.DrawString(verifyCode[i].ToString(), font, brush, startPointF);
curCharSizeF = g.MeasureString(verifyCode[i].ToString(), font);
startPointF.X += curCharSizeF.Width;
}
//畫圖片的干擾線
for (int i = 0; i < 10; i++)
{
int x1 = random.Next(bitmap.Width);
int x2 = random.Next(bitmap.Width);
int y1 = random.Next(bitmap.Height);
int y2 = random.Next(bitmap.Height);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}
//畫圖片的前景干擾點
for (int i = 0; i < 100; i++)
{
int x = random.Next(bitmap.Width);
int y = random.Next(bitmap.Height);
bitmap.SetPixel(x, y, Color.FromArgb(random.Next()));
}
g.DrawRectangle(new Pen(Color.Silver), 0, 0, bitmap.Width - 1, bitmap.Height - 1); //畫圖片的邊框線
g.Dispose();
return bitmap;
}
///
/// 驗證碼圖片 => byte[]
///
/// 驗證碼
/// 寬
/// 高
/// byte[]
public byte[] CreateByteByImgVerifyCode(string verifyCode, int width, int height){
Font font = new Font("Arial", 14, (FontStyle.Bold | FontStyle.Italic));
Brush brush;
Bitmap bitmap = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bitmap);
SizeF totalSizeF = g.MeasureString(verifyCode, font);
SizeF curCharSizeF;
PointF startPointF = new PointF(0, (height - totalSizeF.Height) / 2);
Random random = new Random(); //隨機數(shù)產(chǎn)生器
g.Clear(Color.White); //清空圖片背景色
for (int i = 0; i < verifyCode.Length; i++)
{
brush = new LinearGradientBrush(new Point(0, 0), new Point(1, 1), Color.FromArgb(random.Next(255), random.Next(255), random.Next(255)), Color.FromArgb(random.Next(255), random.Next(255), random.Next(255)));
g.DrawString(verifyCode[i].ToString(), font, brush, startPointF);
curCharSizeF = g.MeasureString(verifyCode[i].ToString(), font);
startPointF.X += curCharSizeF.Width;
}
//畫圖片的干擾線
for (int i = 0; i < 10; i++)
{
int x1 = random.Next(bitmap.Width);
int x2 = random.Next(bitmap.Width);
int y1 = random.Next(bitmap.Height);
int y2 = random.Next(bitmap.Height);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}

//畫圖片的前景干擾點
for (int i = 0; i < 100; i++)
{
int x = random.Next(bitmap.Width);
int y = random.Next(bitmap.Height);
bitmap.SetPixel(x, y, Color.FromArgb(random.Next()));
}
g.DrawRectangle(new Pen(Color.Silver), 0, 0, bitmap.Width - 1, bitmap.Height - 1); //畫圖片的邊框線
g.Dispose();

//保存圖片數(shù)據(jù)
MemoryStream stream = new MemoryStream();
bitmap.Save(stream, ImageFormat.Jpeg);
//輸出圖片流
return stream.ToArray();
}
#endregion

三、后臺控制器根據(jù)請求返回相應(yīng)圖形數(shù)據(jù)

#region 驗證碼
#region 混合驗證碼
[HttpGet]
public string MixVerifyCodeJson(){
string code = VerifyCodeHelper.GetSingleObj().CreateVerifyCode(VerifyCodeHelper.VerifyCodeType.MixVerifyCode);
var bitmap = VerifyCodeHelper.GetSingleObj().CreateBitmapByImgVerifyCode(code, 100, 40);
byte[] imgBt = CommonHelper.Bitmap2Byte(bitmap);
string uuid = Guid.NewGuid().ToString();
return CommonHelper.CodeJson(uuid, Convert.ToBase64String(imgBt));
}
[HttpGet]
public IActionResult MixVerifyCode(){
string code = VerifyCodeHelper.GetSingleObj().CreateVerifyCode(VerifyCodeHelper.VerifyCodeType.MixVerifyCode);
var bitmap = VerifyCodeHelper.GetSingleObj().CreateBitmapByImgVerifyCode(code, 100, 40);
MemoryStream stream = new MemoryStream();
bitmap.Save(stream, ImageFormat.Png);
return File(stream.ToArray(), "image/png");
}
#endregion

#region 數(shù)字驗證碼
[HttpGet]
public string NumberVerifyCodeJson(){
string code = VerifyCodeHelper.GetSingleObj().CreateVerifyCode(VerifyCodeHelper.VerifyCodeType.NumberVerifyCode);
var bitmap = VerifyCodeHelper.GetSingleObj().CreateBitmapByImgVerifyCode(code, 100, 40);
byte[] imgBt = CommonHelper.Bitmap2Byte(bitmap);
string uuid = Guid.NewGuid().ToString();
return CommonHelper.CodeJson(uuid, Convert.ToBase64String(imgBt));
}
[HttpGet]
public IActionResult NumberVerifyCode(){
string code = VerifyCodeHelper.GetSingleObj().CreateVerifyCode(VerifyCodeHelper.VerifyCodeType.NumberVerifyCode);
var bitmap = VerifyCodeHelper.GetSingleObj().CreateBitmapByImgVerifyCode(code, 100, 40);
MemoryStream stream = new MemoryStream();
bitmap.Save(stream, ImageFormat.Png);
return File(stream.ToArray(), "image/png");
}
#endregion

#region 字母驗證碼
[HttpGet]
public IActionResult AbcVerifyCode(){
string code = VerifyCodeHelper.GetSingleObj().CreateVerifyCode(VerifyCodeHelper.VerifyCodeType.AbcVerifyCode);
var bitmap = VerifyCodeHelper.GetSingleObj().CreateBitmapByImgVerifyCode(code, 100, 40);
MemoryStream stream = new MemoryStream();
bitmap.Save(stream, ImageFormat.Png);
return File(stream.ToArray(), "image/png");
}
[HttpGet]
public string AbcVerifyCodeJson(){
string code = VerifyCodeHelper.GetSingleObj().CreateVerifyCode(VerifyCodeHelper.VerifyCodeType.AbcVerifyCode);
var bitmap = VerifyCodeHelper.GetSingleObj().CreateBitmapByImgVerifyCode(code, 100, 40);
byte[] imgBt = CommonHelper.Bitmap2Byte(bitmap);
string uuid = Guid.NewGuid().ToString();
return CommonHelper.CodeJson(uuid, Convert.ToBase64String(imgBt));
}
#endregion
#endregion

四、前端請求分為直接請求文件或json圖形數(shù)據(jù)并渲染至Img標(biāo)簽

五、效果如圖

注意：我們機遇屋該項目將長期為大家提供ASP.NET Core各種好用demo，旨在幫助.NET開發(fā)者提升競爭力和開發(fā)速度，建議盡早收藏該模板集合項目。

推薦閱讀

(點擊標(biāo)題可跳轉(zhuǎn)閱讀)

ASP.NET Core如何使用壓縮中間件提高Web應(yīng)用程序性能

.NET Core+Topshelf+Quartz創(chuàng)建Windows定時任務(wù)服務(wù)

.NET Core實現(xiàn)健康檢查

看完本文有收獲？請轉(zhuǎn)發(fā)分享給更多人

關(guān)注「DotNet」加星標(biāo)，提升.Net技能?

好文章，我在看??

總結(jié)

以上是生活随笔為你收集整理的vue通过class获取dom_.NET Core通过Json或直接获取图形验证码（务必收藏备用）的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。

上一篇： IPMI设置与使用（远程控制服务器）
下一篇： 799 元：小米米家扫拖机器人 1T