```csharp
            string base64data = base64.Split(',')[0];
            base64 = base64.Replace(base64data + ",", "");
            byte[] arr = null;
            try {
                arr = Convert.FromBase64String(base64);
            }
            catch {
                return "";
            }
          
            string zt = "err";
            using (MemoryStream ms = new MemoryStream(arr))
            {
                using (Bitmap bmp = new Bitmap(ms))
                {
                    try
                    {
                        string path = HttpContext.Current.Server.MapPath("/Images/");
                        if (!Directory.Exists(path))//如果日志目录不存在就创建
                        {
                            Directory.CreateDirectory(path);
                        }
                        string Pic_Path = path + "/" + openid + ".jpg";
                        bmp.Save(Pic_Path, System.Drawing.Imaging.ImageFormat.Jpeg);
                        bmp.Dispose();//释放资源，用完千万别忘记释放                        
                        if (typ == "1")
                        {
                            zt = DisIdcard(base64);
                        }
                        else
                        {
                            zt = "{}";
                        }
                    }
                    catch
                    {

                    }
                }
            }
```

C# bsae64转图片并保存到服务器

```
 public static string SCZFM(string id, string name)
        {
            string pathewm = System.Web.HttpContext.Current.Server.MapPath("EWM");
            string pp = pathewm + "\\" + id + ".png";
            if (File.Exists(@pp))
            {
                return id;
            }

            string des = "http://xxxx" + id;//二维码解析后的地址
            int size = 200;

            string path = System.Web.HttpContext.Current.Server.MapPath("EWM2");
            string file = path + "\\" + id + ".png";
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            
            //qrCodeEncoder.QRCodeVersion = 15;
            qrCodeEncoder.QRCodeScale = 4;
            System.Drawing.Image image = qrCodeEncoder.Encode(des);
            if (size > 0)
            {
                //当设定目标图片尺寸大于生成的尺寸时，逐步增大方格尺寸
                while (image.Width < size)
                {
                    qrCodeEncoder.QRCodeScale++;
                    System.Drawing.Image imageNew = qrCodeEncoder.Encode(des);
                    if (imageNew.Width < size)
                    {
                        image = new System.Drawing.Bitmap(imageNew);
                        imageNew.Dispose();
                        imageNew = null;
                    }
                    else
                    {
                        qrCodeEncoder.QRCodeScale--; //新尺寸未采用，恢复最终使用的尺寸
                        imageNew.Dispose();
                        imageNew = null;
                        break;
                    }
                }


                //当设定目标图片尺寸小于生成的尺寸时，逐步减小方格尺寸

                while (image.Width > size && qrCodeEncoder.QRCodeScale > 1)
                {
                    qrCodeEncoder.QRCodeScale--;
                    System.Drawing.Image imageNew = qrCodeEncoder.Encode(des);
                    image = new System.Drawing.Bitmap(imageNew);
                    imageNew.Dispose();
                    imageNew = null;
                    if (image.Width < size)
                    {
                        break;

                    }
                }

                //生成图像
                //Bitmap image = qrCodeEncoder.Encode(des, Encoding.Default);
                //将image保存到filename
                image.Save(file);

                int W = 750;
                int H = 1334;
                string filePath = HttpContext.Current.Server.MapPath("/wemmain.jpg");
                Bitmap map = new Bitmap(filePath);
                Bitmap bmp = new Bitmap(map, W, H);

                Graphics g = Graphics.FromImage(bmp);
                //g.DrawImage(map, 0, 0, 800, 1134);

                string txfile = HttpContext.Current.Server.MapPath("/EWM2/" + id + ".png");
                Bitmap txmap = new Bitmap(txfile);
                g.DrawImage(txmap, 291, 634, 167, 167);


                System.Drawing.Font f2 = new Font("黑体", 20);
                System.Drawing.Brush b2 = new SolidBrush(Color.White);
                string tels = id.Substring(0, 3) + "****" + id.Substring(7, 4);
                g.DrawString("文字：" + tels, f2, b2, 263, 1183);
                g.DrawString("---  文字：" + name + "  ---", f2, b2, 187, 1229);

                string Pic_Path = HttpContext.Current.Server.MapPath("/EWM/" + id + ".png");
                bmp.Save(Pic_Path, System.Drawing.Imaging.ImageFormat.Jpeg);
                g.Dispose();
                map.Dispose();
                bmp.Dispose();

            }
            return id;
        }
```

C#生成推广码（二维码+背景图片）

大家都知道通过sql可以利用where 来从一个表中快速的查找到符合条件的数据，但是如果在C#的DataTable中怎么快速的查询呢，那么就要用到DataRow，方法如下

```
 DataRow[] drs = dt_ua.Select(" 字段1 > '' and 字段2 like ' %' ", "排序字段 ，默认升序");
```

C# 从DataTable中快速查找数据

```
DataTable dt= new DataTable();
dtsnt1.Columns.Add("id", typeof(string));//id 是指列名，typeof(string)是指属性
dtsnt1.Columns.Add("code", typeof(string));
```

C#中 定义DataTable

用到C#的SqlBulkCopy方法。

```
   string strcon = "server=数据库IP;database=数据库名称;uid=数据库账号;pwd=数据库密码;";
                System.Data.SqlClient.SqlBulkCopy bcpss = new System.Data.SqlClient.SqlBulkCopy(strcon);
                bcpss.DestinationTableName = "目标表明";
                bcpss.WriteToServer(dtsnt1);// DataTable dtsnt1 = new DataTable(); 既在C#中创建的DataTable ，注意列的数量应该一致
```

C#更新批量数据到数据库

当我们要将表A中批量数据更新到B表的时候，如果B表中存在则更新，不存在则插入，需要用到 SQL 的  Merge info，语句以下：

```
MERGE 
    [ TOP ( expression ) [ PERCENT ] ] 
    [ INTO ] <操作表> --即将做插入、更新、删除的表
    USING <源表或者数据集或者子查询> --用户提供匹配条件来源的集合或者表
    ON <匹配条件> --可以是任意有效的条件组合
    [ WHEN MATCHED [ AND <clause_search_condition> ]--匹配条件成立
        THEN <SQL语句1> ]
    [ WHEN NOT MATCHED [ BY TARGET ] [ AND <clause_search_condition> ]--匹配条件不成立
        THEN <SQL语句2> ]
    [ WHEN NOT MATCHED BY SOURCE [ AND <clause_search_condition> ]--目标变不存在而源表存在的数据
        THEN <SQL语句3> ] 
;
```



SQL更新数据：从A表更新到B表，批量更新 


```
if exists(select * from 表名 from 条件)
begin 
update ;--更新语句
end 
else 
insert;--插入语句
end
```
此方法适用于单条语句插入或者少量数据操作


SQL 更新数据：有则更新，无则插入

前些天一直在找便宜的云服务器，偶然间发现一免费的云平台，这里推荐给大家。

就是阿贝云，网站是https://www.abeiyun.com

说一下感受

1、阿贝云虽然是一小众的云平台，重在免费，该有的东西都有，还能免备案这是最舒服的。

2、使用了一天，上了项目，网速不慢。

3、唯一要指出来就是磁盘太小。

分享免费云服务器

拉取了rustbuster的v3.0.3版本文件, 二进制文件无法使用, 执行结果如下:

```bash
[root_cn@archlinux target]$ ./rustbuster-v3.0.3-x86_64-unknown-linux-gnu
./rustbuster-v3.0.3-x86_64-unknown-linux-gnu: error while loading shared libraries: libssl.so.1.1: cannot open shared object file: No such file or directory
```

拉取了main源码, 想自行尝试编译, 然后卡在了openssl, 以下为报错信息:

```rust
The following warnings were emitted during compilation:

warning: openssl-sys@0.9.47: build/expando.c:4:24: error: pasting "RUST_VERSION_OPENSSL_" and "(" does not give a valid preprocessing token
warning: openssl-sys@0.9.47:     4 | #define VERSION2(n, v) RUST_VERSION_##n##_##v
warning: openssl-sys@0.9.47:       |                        ^~~~~~~~~~~~~
warning: openssl-sys@0.9.47: build/expando.c:5:23: note: in expansion of macro ‘VERSION2’
warning: openssl-sys@0.9.47:     5 | #define VERSION(n, v) VERSION2(n, v)
warning: openssl-sys@0.9.47:       |                       ^~~~~~~~
warning: openssl-sys@0.9.47: build/expando.c:10:1: note: in expansion of macro ‘VERSION’
warning: openssl-sys@0.9.47:    10 | VERSION(OPENSSL, OPENSSL_VERSION_NUMBER)
warning: openssl-sys@0.9.47:       | ^~~~~~~

error: failed to run custom build command for `openssl-sys v0.9.47`

Caused by:
  process didn't exit successfully: `/mnt/d/work/file/rust/rustbuster/target/debug/build/openssl-sys-c5a482a9e0e49574/build-script-main` (exit status: 101)
  --- stdout
  cargo:rustc-cfg=const_fn
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
  OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
  OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_DIR
  OPENSSL_DIR unset
  cargo:rustc-link-lib=ssl
  cargo:rustc-link-lib=crypto
  OPT_LEVEL = Some("0")
  TARGET = Some("x86_64-unknown-linux-gnu")
  HOST = Some("x86_64-unknown-linux-gnu")
  CC_x86_64-unknown-linux-gnu = None
  CC_x86_64_unknown_linux_gnu = None
  HOST_CC = None
  CC = None
  CFLAGS_x86_64-unknown-linux-gnu = None
  CFLAGS_x86_64_unknown_linux_gnu = None
  HOST_CFLAGS = None
  CFLAGS = None
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("true")
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2")
  running: "cc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-m64" "-Wall" "-Wextra" "-E" "build/expando.c"
  cargo:warning=build/expando.c:4:24: error: pasting "RUST_VERSION_OPENSSL_" and "(" does not give a valid preprocessing token
  cargo:warning=    4 | #define VERSION2(n, v) RUST_VERSION_##n##_##v
  cargo:warning=      |                        ^~~~~~~~~~~~~
  cargo:warning=build/expando.c:5:23: note: in expansion of macro ‘VERSION2’
  cargo:warning=    5 | #define VERSION(n, v) VERSION2(n, v)
  cargo:warning=      |                       ^~~~~~~~
  cargo:warning=build/expando.c:10:1: note: in expansion of macro ‘VERSION’
  cargo:warning=   10 | VERSION(OPENSSL, OPENSSL_VERSION_NUMBER)
  cargo:warning=      | ^~~~~~~
  exit status: 1

  --- stderr
  thread 'main' panicked at /home/root_cn/.cargo/registry/src/mirrors.sjtug.sjtu.edu.cn-4f7dbcce21e258a2/openssl-sys-0.9.47/build/main.rs:126:13:

  Header expansion error:
  Error { kind: ToolExecError, message: "Command \"cc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-g\" \"-fno-omit-frame-pointer\" \"-m64\" \"-Wall\" \"-Wextra\" \"-E\" \"build/expando.c\" with args \"cc\" did not execute successfully (status code exit status: 1)." }

  Failed to find OpenSSL development headers.

  You can try fixing this setting the `OPENSSL_DIR` environment variable
  pointing to your OpenSSL installation or installing OpenSSL headers package
  specific to your distribution:

      # On Ubuntu
      sudo apt-get install libssl-dev
      # On Arch Linux
      sudo pacman -S openssl
      # On Fedora
      sudo dnf install openssl-devel

  See rust-openssl README for more information:

      https://github.com/sfackler/rust-openssl#linux

  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
```

经过检查openssl与rust均为最新版本, 

```bash
[root_cn@archlinux target]$ sudo pacman -S rust
[sudo] password for root_cn:
warning: rust-1:1.77.2-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Package (1)  Old Version  New Version  Net Change

extra/rust   1:1.77.2-1   1:1.77.2-1     0.00 MiB

Total Installed Size:  249.41 MiB
Net Upgrade Size:        0.00 MiB

:: Proceed with installation? [Y/n] n
[root_cn@archlinux target]$ sudo pacman -S openssl
warning: openssl-3.2.1-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Package (1)   Old Version  New Version  Net Change

core/openssl  3.2.1-1      3.2.1-1        0.00 MiB

Total Installed Size:  11.45 MiB
Net Upgrade Size:       0.00 MiB

:: Proceed with installation? [Y/n] n
```

在网上找了一下, 查到资料, 在[rust-openssl的issues](https://github.com/sfackler/rust-openssl/issues/1227)中提到类似报错, 得到解释如下:

> If you are cross compiling to MUSL, you either need to point openssl-sys to the location that you have a copy of OpenSSL cross compiled to MUSL, or tell it to build a copy of OpenSSL itself with the vendored feature.
>
>	如果你是交叉编译到MUSL，你需要将openssl-sys指向你有一个交叉编译到MUSL的OpenSSL副本的位置，或者告诉它用vendored特性构建一个OpenSSL本身的副本。

由于不会rust, 依靠关键词"交叉编译"+"cargo"搜索到了[cargo交叉编译rust程序](https://blog.csdn.net/tyc880616/article/details/104371502), 顺着找到文件:

```
[root_cn@archlinux .cargo]$ cat ~/.cargo/config
[source.crates-io]
replace-with = 'sjtu' # 指定使用下面哪个源，修改为source.后面的内容即可

# 中国科学技术大学
[source.ustc]
registry = "https://mirrors.ustc.edu.cn/crates.io-index"

# 上海交通大学
[source.sjtu]
registry = "https://mirrors.sjtug.sjtu.edu.cn/git/crates.io-index/"

# 清华大学
[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"

# rustcc社区
[source.rustcc]
registry = "https://code.aliyun.com/rustcc/crates.io-index.git"
```

没有找到交叉编译的设置, 由于本人不会rust, 线索断了, 尝试向大家寻求一波帮助, 非常感谢阅读.



急切寻求rust编译问题帮助(archlinux, openssl)

永久免费，无需注册

[https://good.xjai.top](https://good.xjai.top)

分享免费GPT4站点

[MoienTajik/AspNetCore-Developer-Roadmap (github.com)](https://github.com/MoienTajik/AspNetCore-Developer-Roadmap/blob/master/ReadMe.zh-Hant.md)

![](https://github.com/MoienTajik/AspNetCore-Developer-Roadmap/raw/master/aspnetcore-developer-roadmap.zh-Hant.png)



【轉貼】ASP.NET Core Developer Roadmap in 2024

南京大学数字金融 - 新华报业集团联合诚邀全职博士后！

【研究方向涵盖】

数智传播、数智金融经济、数据金融经济、数智政务、数智监管治理，以及“大数据、大模型、大计算”全新范式等方向理论与实践

 【具体研究领域】

包括 Bigdata4SocialScience、AI4SocialScience、LLM4SocialScience、Blockchain4SocialScience，以及先进信息技术融合创新在数智金融经济、数智传播社会、数智健康医疗、数智政务治理中的应用。

【薪资待遇优渥】

年薪可达 30 万人民币左右，另有绩效奖金及江苏省和南京市人才补贴。具体薪资需与HR面议，总收入依据专业背景和技能经验而定（计算机 AI 背景者薪资更优）。

【欢迎学科交叉、专业背景不限】

不限制专业背景，致力于构建一个多元、开放、包容的科研环境，因此，欢迎计算机、软件、大数据、人工智能、区块链、隐私计算、数据安全、数据科学等背景的博士人才，也热切邀请具有人文社科背景的博士加入我们的团队，共同探索信息技术与社会科学的交叉前沿。也欢迎其他编程能力强的理工科博士毕业生（即使没有AI等背景也欢迎）。

【南京大学研究中心】

南京大学研究中心为双院士领军的校级科研和创新平台，详情请见：fintech.nju.edu.cn。

【团队氛围】

学科交叉、理论与实践相结合、国际化视野、行业前沿视角和项目。

【联系我们】

请感兴趣的朋友将个人简历发送至邮箱:blockchainfintech@126.com。

【更多招募】 南京大学研究中心招收硕士生、博士生、博士后、青年教师、研究员，也欢迎访问、客座、联培以及科研助理（有些岗位可兼职或远程合作）等

欢迎加入我们，您将在这个富有挑战性和机遇的环境中，开启广阔的职业发展道路，实现个人价值与学术梦想的双赢！

期待您的加入，携手共创数智未来！

南京大学研究中心诚募博士后



![](https://image.hackertalk.net/images/62537abc-405f-44da-a67e-9f18082f3d74)















sqlmap -u "xxxxx.com/#/login" --all  --delay 1 --batch --random-agent

[CRITICAL]can't establish SSL connection.

![](https://image.hackertalk.net/images/4a856cac-750c-4972-aa1f-4bf02f000394)

sqlmap -r win.txt --dbs

**

[CRITICAL] anti-CSRF token 'XSRF-TOKEN' can't be found 


**


