<script>
$(function () {
var controllerName = "@ViewContext.RouteData.Values["controller"].ToString().ToLower()";
$('#nav_' + controllerName).addClass('active');
});
</script>ASP.NET MVC View中获取控制器名称
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标签归档：ASP.NET MVC
ASP.NET MVC 显示HTML后缀
web.config中添加
<validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>ASP.NET MVC在Controller中，把JsonResult转为JSON字符串
string json = new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(jsonResult.Data);
Response.Write(json);ASP.NET MVC缓存absoluteExpiration、slidingExpiration两个参数的疑惑
C#缓存absoluteExpiration、slidingExpiration两个参数的疑惑
看了很多资料终于搞明白cache中absoluteExpiration，slidingExpiration这两个参数的含义。
absoluteExpiration：用于设置绝对过期时间，它表示只要时间一到就过期，所以类型为System.DateTime，当给这个参数设置了一个时间时，slidingExpiration参数的值就只能为Cache.NoSlidingExpiration，否则出错；
slidingExpiration：用于设置可调过期时间，它表示当离最后访问超过某个时间段后就过期，所以类型为System.TimeSpan，当给这个参数设置了一个时间段时，absoluteExpiration的值就只能为Cache.NoAbsoluteExpiration，否则出错；
asp.net mvc生成验证码
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Web.UI;
using System.Drawing.Drawing2D;
using System.IO;
namespace Site.Common
{
/// <summary>
/// 生成验证码的类
/// </summary>
public class ValidateCode
{
public ValidateCode()
{
}
/// <summary>
/// 验证码的最大长度
/// </summary>
public int MaxLength
{
get { return 10; }
}
/// <summary>
/// 验证码的最小长度
/// </summary>
public int MinLength
{
get { return 1; }
}
/// <summary>
/// 生成验证码
/// </summary>
/// <param name="length">指定验证码的长度</param>
/// <returns></returns>
public string CreateValidateCode(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 = (int)seekRand.Next(0, Int32.MaxValue - length * 10000);
int[] seeks = new int[length];
for (int i = 0; i < length; i++)
{
beginSeek += 10000;
seeks[i] = beginSeek;
}
//生成随机数字
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);
}
//抽取随机数字
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));
}
//生成验证码
for (int i = 0; i < length; i++)
{
validateNumberStr += validateNums[i].ToString();
}
return validateNumberStr;
}
/// <summary>
/// 创建验证码的图片
/// </summary>
/// <param name="containsPage">要输出到的page对象</param>
/// <param name="validateNum">验证码</param>
public byte[] CreateValidateGraphic(string validateCode)
{
Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 12.0), 24);
Graphics g = Graphics.FromImage(image);
try
{
//生成随机生成器
Random random = new Random();
//清空图片背景色
g.Clear(Color.White);
//画图片的干扰线
for (int i = 0; i < 25; i++)
{
int x1 = random.Next(image.Width);
int x2 = random.Next(image.Width);
int y1 = random.Next(image.Height);
int y2 = random.Next(image.Height);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}
Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));
LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),
Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(validateCode, font, brush, 3, 2);
//画图片的前景干扰点
for (int i = 0; i < 100; i++)
{
int x = random.Next(image.Width);
int 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);
//保存图片数据
MemoryStream stream = new MemoryStream();
image.Save(stream, ImageFormat.Jpeg);
//输出图片流
return stream.ToArray();
}
finally
{
g.Dispose();
image.Dispose();
}
}
/// <summary>
/// 得到验证码图片的长度
/// </summary>
/// <param name="validateNumLength">验证码的长度</param>
/// <returns></returns>
public static int GetImageWidth(int validateNumLength)
{
return (int)(validateNumLength * 12.0);
}
/// <summary>
/// 得到验证码的高度
/// </summary>
/// <returns></returns>
public static double GetImageHeight()
{
return 22.5;
}
}
}调用
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Site.Common;
namespace Site.Controllers
{
public class YzmController : Controller
{
// GET: Yzm
public ActionResult Index()
{
ValidateCode vCode = new ValidateCode();
string code = vCode.CreateValidateCode(4);
Session["ValidateCode"] = code;
byte[] bytes = vCode.CreateValidateGraphic(code);
return File(bytes, @"image/jpeg");
}
}
}ASP.NET MVC自定义用户认证过滤器
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace Site.Filters
{
public enum AuthorizeScheme
{
Backend = 0,
Frontend = 1
}
// 自定义用户认证过滤器
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
public class CustomAuthorization : AuthorizeAttribute // Authorize [ˈɔ:θəraɪz] vt. 授权，批准，委托
{
public AuthorizeScheme Scheme { get; set; }
public CustomAuthorization() : base()
{
Scheme = AuthorizeScheme.Frontend;
}
public override void OnAuthorization(AuthorizationContext filterContext)
{
//解决自定义AuthorizeAttribute实现授权管理，AllowAnonymous属性失效导致无法匿名访问控制器的问题
bool flag = filterContext.ActionDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true) ||
filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true);
if (flag)
{
return;
}
if (!filterContext.HttpContext.User.Identity.IsAuthenticated)
{
string returnUrl = filterContext.RequestContext.HttpContext.Request.Url.ToString();
string host = HttpContext.Current.Request.Url.Host;
int port = HttpContext.Current.Request.Url.Port;
if (Scheme == AuthorizeScheme.Frontend)
{
filterContext.HttpContext.Response.Redirect($"http://{host}:{port}/Login?return_url={returnUrl}");
}
else if (Scheme == AuthorizeScheme.Backend)
{
filterContext.HttpContext.Response.Redirect($"http://{host}:{port}/Admin/Home/Login?return_url={returnUrl}");
}
}
base.OnAuthorization(filterContext);
}
}
}
ASP.NET MVC 5 的路由
ASP.NET5的路由
不用加 MapMvcAttributeRoutes 也可以使用
不用加LowercaseUrls=true; 在view里面直接小写就行
<a asp-controller="home" asp-action="test" asp-route-id="11" asp-route-name="wujie">测试 </a>至于在URL最后加/， 这个可有可无了。
Razor中判断是Debug模式还是Release模式
@if (!HttpContext.Current.IsDebuggingEnabled)
{
}HttpContext.Current.IsDebuggingEnabled的值取决于web.config中的
<compilation debug="true" targetFramework =" 4.5" />ASP.NET MVC 输出ModelState中的所有错误信息
StringBuilder sb = new StringBuilder ();
var Keys = ModelState.Keys.ToList();
foreach (var key in Keys)
{
var errors = ModelState[key].Errors.ToList();
//将错误描述添加到sb中
foreach (var error in errors)
{
sb.AppendLine(error.ErrorMessage);
}
}
ViewBag.err = sb.ToString();ASP.NET MVC Controller中执行javascript
[HttpPost]
public ActionResult AjaxDelete(int id)
{
using (var conn=DBConn.OpenConnection())
{
conn.Execute( "DELETE FROM Tel WHERE Id=@id", new { id = id });
}
return JavaScript( "location.reload();");
}最后返回调用JavaScript的函数，这个函数参数就是要执行的JS脚本代码，在客户端页面执行。
ASP.NET MVC模式
ASP.NET MVC模式：一个页面对应一个action函数
经典模式：一个页面对应一个类
使用Request.Url.Scheme+Request.Url.Authority拼URL时要注意的
Request.Url.Scheme 返回的仅仅是“http”字符串，注意，它不带 ://
Request.Url.Authority 返回的是域名+端口
完整的拼URL应该这样写 Request.Url.Scheme + “://” + Request.Url.Authority
一下午时间的教训，之前写错了，一直404.或者打开页面时显示新标签页。。