docs(Docs)：添加数据库连接文档

Docs/Jupter笔记.001.入门说明.ipynb

@@ -12,7 +12,7 @@
     }
    },
    "source": [
-    "多线程学习笔记，Jupyter NoteBook\n",
+    "Jupyter NoteBook 简单入门\n",
     "==============================\n",
     "\n",
     "使用 Jupyter NoteBook 形式，优点是代码执行和 Markdown 文档放在同一个文件中，并可以交替显示和分段执行代码。"
@@ -869,6 +869,22 @@
       ],
       "languageName": null,
       "name": "vscode"
+     },
+     {
+      "aliases": [
+       "js"
+      ],
+      "languageName": "JavaScript",
+      "name": "javascript"
+     },
+     {
+      "aliases": [],
+      "name": "webview"
+     },
+     {
+      "aliases": [],
+      "languageName": null,
+      "name": ".NET"
      }
     ]
    }

Docs/Jupter笔记.002.线程.ipynb

@@ -182,7 +182,6 @@
      },
      {
       "aliases": [],
-      "languageName": null,
       "name": ".NET"
      },
      {
@@ -215,7 +214,6 @@
      },
      {
       "aliases": [],
-      "languageName": null,
       "name": "value"
      },
      {
@@ -228,6 +226,11 @@
      {
       "aliases": [],
       "name": "webview"
+     },
+     {
+      "aliases": [],
+      "languageName": "T-SQL",
+      "name": "sql-Demo"
      }
     ]
    }

Docs/Jupter笔记.002.连接数据库.ipynb

@@ -0,0 +1,655 @@
+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "连接数据库\n",
+    "==============================\n",
+    "连接到SQL Server,并操作数据。 "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "+ 引用操作类库"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "#r \"nuget:Microsoft.Dotnet.Interactive.SqlServer,*-*\""
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "+ 连接到SQL Server\n",
+    "  > 数据库连接命令为 `#!connect` 查看连接帮助 `#!connect -h`"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "#!connect -h\n"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "> 连接到本机SQL Server, 特别注意的是 --kernel-name 指定名称，后面的SQL操作均需要使用：sql-{{kernel-name}}的值\n",
+    "> 比如 --kernel-name Demo, 则该SQL连接的kernel名称为 sql-Demo, 使用 #!sql-Demo 进行引用"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Kernel added: #!sql-Demo"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "#!connect mssql \"server=.\\SQL2008;uid=sa;pwd=gly-bicijinlian;database=Demo;Encrypt=True;TrustServerCertificate=True;\" --kernel-name Demo\n",
+    "\n",
+    "//重复执行会抛出错误，目前没有找到解决方法\n"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "+ 使用连接\n",
+    "  一种方法是：在右下角，切换 Kernel, 由 `csharp - C# Script` 换成  由--kernel-name指定值生成的 `sql-Demo - T-SQL`"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "sql-Demo"
+    },
+    "polyglot_notebook": {
+     "kernelName": "sql-Demo"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "(4 行受到影响)"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/csv": [
+       "Id,Name,Age\r\n",
+       "1,张三,20\r\n",
+       "2,李四,30\r\n",
+       "3,三丰,300\r\n",
+       "4,小龙子,50\r\n"
+      ],
+      "text/html": [
+       "<table><thead><tr><td><span>Id</span></td><td><span>Name</span></td><td><span>Age</span></td></tr></thead><tbody><tr><td><div class=\"dni-plaintext\"><pre>1</pre></div></td><td>张三</td><td><div class=\"dni-plaintext\"><pre>20</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>2</pre></div></td><td>李四</td><td><div class=\"dni-plaintext\"><pre>30</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>3</pre></div></td><td>三丰</td><td><div class=\"dni-plaintext\"><pre>300</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>4</pre></div></td><td>小龙子</td><td><div class=\"dni-plaintext\"><pre>50</pre></div></td></tr></tbody></table><style>\r\n",
+       ".dni-code-hint {\r\n",
+       "    font-style: italic;\r\n",
+       "    overflow: hidden;\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview {\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview td {\r\n",
+       "    vertical-align: top;\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "details.dni-treeview {\r\n",
+       "    padding-left: 1em;\r\n",
+       "}\r\n",
+       "table td {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "table tr { \r\n",
+       "    vertical-align: top; \r\n",
+       "    margin: 0em 0px;\r\n",
+       "}\r\n",
+       "table tr td pre \r\n",
+       "{ \r\n",
+       "    vertical-align: top !important; \r\n",
+       "    margin: 0em 0px !important;\r\n",
+       "} \r\n",
+       "table th {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "</style>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "SELECT * from Test"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "> 推荐的是下面的方法：即使用 `#!sql-Demo` ,后面直接写SQL语句，不用切换 kernel "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "(4 行受到影响)"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/csv": [
+       "Id,Name,Age\r\n",
+       "1,张三,20\r\n",
+       "2,李四,30\r\n",
+       "3,三丰,300\r\n",
+       "4,小龙子,50\r\n"
+      ],
+      "text/html": [
+       "<table><thead><tr><td><span>Id</span></td><td><span>Name</span></td><td><span>Age</span></td></tr></thead><tbody><tr><td><div class=\"dni-plaintext\"><pre>1</pre></div></td><td>张三</td><td><div class=\"dni-plaintext\"><pre>20</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>2</pre></div></td><td>李四</td><td><div class=\"dni-plaintext\"><pre>30</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>3</pre></div></td><td>三丰</td><td><div class=\"dni-plaintext\"><pre>300</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>4</pre></div></td><td>小龙子</td><td><div class=\"dni-plaintext\"><pre>50</pre></div></td></tr></tbody></table><style>\r\n",
+       ".dni-code-hint {\r\n",
+       "    font-style: italic;\r\n",
+       "    overflow: hidden;\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview {\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview td {\r\n",
+       "    vertical-align: top;\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "details.dni-treeview {\r\n",
+       "    padding-left: 1em;\r\n",
+       "}\r\n",
+       "table td {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "table tr { \r\n",
+       "    vertical-align: top; \r\n",
+       "    margin: 0em 0px;\r\n",
+       "}\r\n",
+       "table tr td pre \r\n",
+       "{ \r\n",
+       "    vertical-align: top !important; \r\n",
+       "    margin: 0em 0px !important;\r\n",
+       "} \r\n",
+       "table th {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "</style>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "#!sql-Demo\n",
+    "SELECT * from Test"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "## 使用 EF Core"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "+ 新连接,添加 --create-dbcontext 参数"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "Scaffolding a `DbContext` and initializing an instance of it called `DemoEF` in the C# kernel."
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/html": [
+       "<div><div></div><div></div><div><strong>Installed Packages</strong><ul><li><span>Humanizer, 2.14.1</span></li><li><span>humanizer.core, 2.14.1</span></li><li><span>Microsoft.EntityFrameworkCore.Design, 7.0.0</span></li><li><span>microsoft.entityframeworkcore.sqlserver, 7.0.0</span></li><li><span>microsoft.identity.client, 4.48.1</span></li></ul></div></div>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Security Warning: The negotiated TLS 1.0 is an insecure protocol and is supported for backward compatibility only. The recommended protocol version is TLS 1.2 and later.\r\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "Kernel added: #!sql-DemoEF"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "#!connect mssql \"server=.\\SQL2008;uid=sa;pwd=gly-bicijinlian;database=Demo;Encrypt=True;TrustServerCertificate=True;\" --create-dbcontext --kernel-name DemoEF "
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "上面的连接操作，会执行下面的任务：\n",
+    "搭建EFCore基架,并初始化 DBContext 的实例: DemoEF\n",
+    "安装包相关Nuget包,详情见输出\n",
+    "添加新的子内核 #!sql-DemoEF"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "+ 使用EFCore连接，操作数据"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "(4 行受到影响)"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/csv": [
+       "Id,Name,Age\r\n",
+       "1,张三,20\r\n",
+       "2,李四,30\r\n",
+       "3,三丰,300\r\n",
+       "4,小龙子,50\r\n"
+      ],
+      "text/html": [
+       "<table><thead><tr><td><span>Id</span></td><td><span>Name</span></td><td><span>Age</span></td></tr></thead><tbody><tr><td><div class=\"dni-plaintext\"><pre>1</pre></div></td><td>张三</td><td><div class=\"dni-plaintext\"><pre>20</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>2</pre></div></td><td>李四</td><td><div class=\"dni-plaintext\"><pre>30</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>3</pre></div></td><td>三丰</td><td><div class=\"dni-plaintext\"><pre>300</pre></div></td></tr><tr><td><div class=\"dni-plaintext\"><pre>4</pre></div></td><td>小龙子</td><td><div class=\"dni-plaintext\"><pre>50</pre></div></td></tr></tbody></table><style>\r\n",
+       ".dni-code-hint {\r\n",
+       "    font-style: italic;\r\n",
+       "    overflow: hidden;\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview {\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview td {\r\n",
+       "    vertical-align: top;\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "details.dni-treeview {\r\n",
+       "    padding-left: 1em;\r\n",
+       "}\r\n",
+       "table td {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "table tr { \r\n",
+       "    vertical-align: top; \r\n",
+       "    margin: 0em 0px;\r\n",
+       "}\r\n",
+       "table tr td pre \r\n",
+       "{ \r\n",
+       "    vertical-align: top !important; \r\n",
+       "    margin: 0em 0px !important;\r\n",
+       "} \r\n",
+       "table th {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "</style>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "#!sql-DemoEF\n",
+    "SELECT * from Test"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    }
+   },
+   "source": [
+    "+ 程序中使用EF Core连接"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 35,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "csharp"
+    },
+    "polyglot_notebook": {
+     "kernelName": "csharp"
+    },
+    "vscode": {
+     "languageId": "polyglot-notebook"
+    }
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<table><thead><tr><th><i>index</i></th><th>value</th></tr></thead><tbody><tr><td>0</td><td><details class=\"dni-treeview\"><summary><span class=\"dni-code-hint\"><code>Submission#4+Test</code></span></summary><div><table><thead><tr></tr></thead><tbody><tr><td>Id</td><td><div class=\"dni-plaintext\"><pre>1</pre></div></td></tr><tr><td>Name</td><td>张三</td></tr><tr><td>Age</td><td><div class=\"dni-plaintext\"><pre>20</pre></div></td></tr></tbody></table></div></details></td></tr><tr><td>1</td><td><details class=\"dni-treeview\"><summary><span class=\"dni-code-hint\"><code>Submission#4+Test</code></span></summary><div><table><thead><tr></tr></thead><tbody><tr><td>Id</td><td><div class=\"dni-plaintext\"><pre>2</pre></div></td></tr><tr><td>Name</td><td>李四</td></tr><tr><td>Age</td><td><div class=\"dni-plaintext\"><pre>30</pre></div></td></tr></tbody></table></div></details></td></tr><tr><td>2</td><td><details class=\"dni-treeview\"><summary><span class=\"dni-code-hint\"><code>Submission#4+Test</code></span></summary><div><table><thead><tr></tr></thead><tbody><tr><td>Id</td><td><div class=\"dni-plaintext\"><pre>3</pre></div></td></tr><tr><td>Name</td><td>三丰</td></tr><tr><td>Age</td><td><div class=\"dni-plaintext\"><pre>300</pre></div></td></tr></tbody></table></div></details></td></tr><tr><td>3</td><td><details class=\"dni-treeview\"><summary><span class=\"dni-code-hint\"><code>Submission#4+Test</code></span></summary><div><table><thead><tr></tr></thead><tbody><tr><td>Id</td><td><div class=\"dni-plaintext\"><pre>4</pre></div></td></tr><tr><td>Name</td><td>小龙子</td></tr><tr><td>Age</td><td><div class=\"dni-plaintext\"><pre>50</pre></div></td></tr></tbody></table></div></details></td></tr></tbody></table><style>\r\n",
+       ".dni-code-hint {\r\n",
+       "    font-style: italic;\r\n",
+       "    overflow: hidden;\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview {\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview td {\r\n",
+       "    vertical-align: top;\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "details.dni-treeview {\r\n",
+       "    padding-left: 1em;\r\n",
+       "}\r\n",
+       "table td {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "table tr { \r\n",
+       "    vertical-align: top; \r\n",
+       "    margin: 0em 0px;\r\n",
+       "}\r\n",
+       "table tr td pre \r\n",
+       "{ \r\n",
+       "    vertical-align: top !important; \r\n",
+       "    margin: 0em 0px !important;\r\n",
+       "} \r\n",
+       "table th {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "</style>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/html": [
+       "<div class=\"dni-plaintext\"><pre>-1</pre></div><style>\r\n",
+       ".dni-code-hint {\r\n",
+       "    font-style: italic;\r\n",
+       "    overflow: hidden;\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview {\r\n",
+       "    white-space: nowrap;\r\n",
+       "}\r\n",
+       ".dni-treeview td {\r\n",
+       "    vertical-align: top;\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "details.dni-treeview {\r\n",
+       "    padding-left: 1em;\r\n",
+       "}\r\n",
+       "table td {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "table tr { \r\n",
+       "    vertical-align: top; \r\n",
+       "    margin: 0em 0px;\r\n",
+       "}\r\n",
+       "table tr td pre \r\n",
+       "{ \r\n",
+       "    vertical-align: top !important; \r\n",
+       "    margin: 0em 0px !important;\r\n",
+       "} \r\n",
+       "table th {\r\n",
+       "    text-align: start;\r\n",
+       "}\r\n",
+       "</style>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "//连接建立后，执行环境中就有了相关的类：DBContext等\n",
+    "DemoEFContext context = new DemoEFContext();\n",
+    "var t = context.Tests.ToList<Test>();\n",
+    "display(t);\n",
+    "\n",
+    "FormattableString fs = $\"select * from Test;\";\n",
+    "var c = context.Database.ExecuteSql(fs);\n",
+    "display(c);"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": ".NET (C#)",
+   "language": "C#",
+   "name": ".net-csharp"
+  },
+  "polyglot_notebook": {
+   "kernelInfo": {
+    "defaultKernelName": "csharp",
+    "items": [
+     {
+      "aliases": [],
+      "name": "csharp"
+     }
+    ]
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

MultiThreadingStudy.ConsoleApp/Program.cs

@@ -5,9 +5,6 @@ namespace MultiThreadingStudy.ConsoleApp
         static async Task Main(string[] args)
         {
             Console.WriteLine("多线程学习");
-
-            var contents = await new HttpClient()
-            .GetStringAsync("https://www.baidu.com");
         }
     }
 }

MultiThreadingStudy.sln

@@ -17,6 +17,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Docs", "Docs", "{D7713D12-0
 	ProjectSection(SolutionItems) = preProject
 		Docs\Jupter笔记.001.入门说明.ipynb = Docs\Jupter笔记.001.入门说明.ipynb
 		Docs\Jupter笔记.002.线程.ipynb = Docs\Jupter笔记.002.线程.ipynb
+		Docs\Jupter笔记.002.连接数据库.ipynb = Docs\Jupter笔记.002.连接数据库.ipynb
 		Docs\多线程大纲.svg = Docs\多线程大纲.svg
 		Docs\多线程学习大纲.xmind = Docs\多线程学习大纲.xmind
 		Docs\学习.md = Docs\学习.md