/// <summary>
/// 图形验证码
/// </summary>
/// <returns></returns>
public IActionResult ValidateCode()
{
string code = "";
MemoryStream ms = VierificationCodeServices.Create(out code);
HttpContext.Session.SetString("LoginValidateCode", code);
Response.Body.Dispose();
return(File(ms.ToArray(), @"image/png"));
}
/// <summary>
/// 图形验证码
/// </summary>
/// <returns></returns>
public IActionResult GenYZM([FromServices] VierificationCodeServices _vierificationCodeServices)
{
string code = "";
System.IO.MemoryStream ms = _vierificationCodeServices.CreateYZM(out code);
HttpContext.Session.SetString("Code", code);
Response.Body.Dispose();
return(File(ms.ToArray(), @"image/png"));
}
public HttpResponseMessage CreateCheckCodeImage()
{
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
string checkCode = VierificationCodeServices.RndNum();
var image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22); //12.5 22
var g = Graphics.FromImage(image);
try
{
//生成随机生成器
var random = new Random();
//清空图片背景色
g.Clear(Color.White);
//画图片的背景噪音线
for (var i = 0; i < 25; i++)
{
var x1 = random.Next(image.Width);
var x2 = random.Next(image.Width);
var y1 = random.Next(image.Height);
var y2 = random.Next(image.Height);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}
var font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
var brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(checkCode, font, brush, 2, 2);
//画图片的前景噪音点
for (var i = 0; i < 100; i++)
{
var x = random.Next(image.Width);
var y = random.Next(image.Height);
image.SetPixel(x, y, Color.FromArgb(random.Next()));
}
//画图片的边框线
g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
var ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
result.Content = new ByteArrayContent(ms.ToArray());
result.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("image/Gif");
Common.Cookie.setcookieCode("Code", checkCode, 5);
return(result);
}
finally
{
g.Dispose();
image.Dispose();
}
}
public ActionResult GetVerificationCode()
{
string code = string.Empty;
MemoryStream ms = VierificationCodeServices.Create(out code);
TempData[VerificationCode] = code;
Response.Body.Dispose();
byte[] bytes = ms.ToArray();
ms.Dispose();
return(File(bytes, @"image/png"));
}
