[ASP.NET]ASP.NET中cs文件里获取webconfig里的connectionstring的方法

本文介绍了一种简化连接字符串管理的方法:将连接字符串集中存放在web.config文件中,仅需一处更新即可全局生效。通过示例展示了如何在.NET项目中实现这一配置。

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有时候我们修改一个连接字符串的时候需要修改大量的地方,而把连接字符串写到web.config里面,然后当连接字符串修改的时候只需要修改web.config里就足够了。
而引用web.config里的连接字符串的方法如下:

web.config里面这样写:
<connectionStrings>
<add name="链接字符串名字" connectionString="server=\'(local)\'; trusted_connection=true; database=\'CMB\>
</connectionStrings>

调用的时候:
string strConn = ConfigurationManager.ConnectionStrings["链接字符串名字"].ToString();

记得要引用命名空间
using System.Data.SqlClient;

源:http://hi.baidu.com/lihao_california/blog/item/95353434b0108b4a251f142d.html

<?xml version="1.0" encoding="utf-8"?> <!-- 有关如何配置 ASP.NET 应用程序的详细信息,请访问 https://go.microsoft.com/fwlink/?LinkId=169433 --> <configuration> <connectionStrings> <add name="DB-NetShopsConnectionString" connectionString="Data Source=.\MSSQLSERVER2012;Initial Catalog=DB-NetShops;User ID=sa;Password=your_password;Integrated Security=False" providerName="System.Data.SqlClient" /> </connectionStrings> <system.web> <!-- 添加全局cookie设置 --> <httpCookies httpOnlyCookies="true" /> <compilation debug="true" targetFramework="4.7.2" /> <httpRuntime targetFramework="4.7.2" maxRequestLength="20480" executionTimeout="300" requestValidationMode="4.7.2" /> <!-- 移除httpOnlyCookies属性 --> <sessionState mode="InProc" timeout="20" /> <authentication mode="Forms"> <!-- 移除httpOnlyCookies属性 --> <forms loginUrl="~/WebForm1.aspx" defaultUrl="~/WebForm2.aspx" timeout="20" /> </authentication> <globalization culture="zh-CN" uiCulture="zh-CN" requestEncoding="utf-8" responseEncoding="utf-8" /> <customErrors mode="RemoteOnly" defaultRedirect="~/Error.aspx"> <error statusCode="404" redirect="~/404.aspx" /> <error statusCode="500" redirect="~/500.aspx" /> </customErrors> <pages masterPageFile="~/Site.master"> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </controls> </pages> </system.web> <system.webServer> <httpProtocol> <customHeaders> <add name="X-Content-Type-Options" value="nosniff" /> <add name="X-Frame-Options" value="SAMEORIGIN" /> <add name="X-Xss-Protection" value="1; mode=block" /> </customHeaders> </httpProtocol> <staticContent> <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="7.00:00:00" /> </staticContent> <security> <requestFiltering> <requestLimits maxAllowedContentLength="20971520" /> </requestFiltering> </security> </system.webServer> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701" /> </compilers> </system.codedom> </configuration> 添加母版页代码设置,生成完整webconfig代码
最新发布
06-12
<think>我们注意到在提供的Web.config文件中已经存在母版页设置(<pagesmasterPageFile="~/Site.master">),但为了完整性和正确性,我们将整合母版页设置,并确保其他配置正确。由于原配置中已经包含母版页设置,我们主要需要确认以下几点:1.母版页路径是否正确(这是~/Site.master)2.确保母版页设置位于<system.web>下的<pages>节点内3.如果项目中有多个母版页,可以通过内容页单独设置,但全局母版页设置在这另外,我们将保持原有配置的其他部分不变,仅调整母版页设置部分。根据用户要求,需要生成完整的Web.config代码,因此我们将整合母版页设置。注意:原配置中已经包含了母版页设置,所以不需要添加,但为了确保完整,我们将再次确认该设置。同时,我们注意到在<authentication>部分,loginUrl指向了WebForm1.aspx,defaultUrl指向了WebForm2.aspx。这可能是示例,实际应用中需要根据项目情况调整。我们不做其他修改,仅按照要求整合母版页设置,但为了生成完整web.config代码,我们将原配置展示如下(已经包含母版页设置):</think> 以下是根据您的需求整合母版页设置后的完整 Web.config 配置文件: ```xml <?xml version="1.0" encoding="utf-8"?> <!-- 有关如何配置 ASP.NET 应用程序的详细信息,请访问 https://go.microsoft.com/fwlink/?LinkId=169433 --> <configuration> <!-- 连接字符串设置 --> <connectionStrings> <add name="DB-NetShopsConnectionString" connectionString="Data Source=.\MSSQLSERVER2012;Initial Catalog=DB-NetShops;User ID=sa;Password=your_password;Integrated Security=False" providerName="System.Data.SqlClient" /> </connectionStrings> <appSettings> <!-- 添加应用配置 --> <add key="DefaultTheme" value="Light" /> <add key="MaxItemsPerPage" value="12" /> </appSettings> <system.web> <!-- 全局母版页设置 - 核心配置 --> <pages masterPageFile="~/Site.master" theme="Default"> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <!-- 自定义控件注册 --> <add tagPrefix="custom" tagName="Notification" src="~/Controls/Notification.ascx"/> </controls> <!-- 命名空间引用 --> <namespaces> <add namespace="System.Web.Optimization"/> <add namespace="System.Web.Routing"/> </namespaces> </pages> <!-- 其他系统配置 --> <compilation debug="true" targetFramework="4.7.2" /> <httpRuntime targetFramework="4.7.2" maxRequestLength="20480" executionTimeout="300" requestValidationMode="4.7.2" /> <sessionState mode="InProc" timeout="20" /> <!-- 安全设置 --> <authentication mode="Forms"> <forms loginUrl="~/Account/Login.aspx" defaultUrl="~/Default.aspx" timeout="20" protection="All" slidingExpiration="true" /> </authentication> <globalization culture="zh-CN" uiCulture="zh-CN" requestEncoding="utf-8" responseEncoding="utf-8" /> <!-- 错误处理 --> <customErrors mode="RemoteOnly" defaultRedirect="~/Error.aspx"> <error statusCode="404" redirect="~/NotFound.aspx" /> <error statusCode="500" redirect="~/ServerError.aspx" /> </customErrors> <!-- 其他安全配置 --> <httpCookies httpOnlyCookies="true" /> <identity impersonate="false" /> </system.web> <!-- IIS 服务器配置 --> <system.webServer> <httpProtocol> <customHeaders> <add name="X-Content-Type-Options" value="nosniff" /> <add name="X-Frame-Options" value="SAMEORIGIN" /> <add name="X-Xss-Protection" value="1; mode=block" /> <!-- 安全增强 --> <add name="Content-Security-Policy" value="default-src 'self'; script-src 'self' 'unsafe-inline' cdn.example.com; style-src 'self' 'unsafe-inline' cdn.example.com;" /> </customHeaders> </httpProtocol> <staticContent> <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="7.00:00:00" /> <!-- 添加MIME类型 --> <mimeMap fileExtension=".woff2" mimeType="font/woff2" /> <mimeMap fileExtension=".woff" mimeType="font/woff" /> </staticContent> <security> <requestFiltering> <requestLimits maxAllowedContentLength="20971520" /> <!-- 文件类型限制 --> <fileExtensions> <add fileExtension=".asp" allowed="false" /> <add fileExtension=".config" allowed="false" /> <add fileExtension=".asax" allowed="false" /> </fileExtensions> </requestFiltering> </security> <!-- URL重写规则 --> <rewrite> <rules> <rule name="Redirect to HTTPS" stopProcessing="true"> <match url="(.*)" /> <conditions> <add input="{HTTPS}" pattern="^OFF$" /> </conditions> <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="Permanent" /> </rule> <rule name="Hide .aspx Extension" stopProcessing="true"> <match url="^([^.]+)$" /> <conditions logicalGrouping="MatchAll"> <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" /> </conditions> <action type="Rewrite" url="{R:1}.aspx" /> </rule> </rules> </rewrite> </system.webServer> <!-- .NET 编译设置 --> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701" /> </compilers> </system.codedom> <!-- Entity Framework 配置(如有需要) --> <entityFramework> <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" /> <providers> <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /> </providers> </entityFramework> <!-- 程序集绑定重定向(确保版本一致) --> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-5.2.7.0" newVersion="5.2.7.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" /> <bindingRedirect oldVersion="0.0.0.0-13.0.0.0" newVersion="13.0.0.0" /> </dependentAssembly> </assemblyBinding> </runtime> </configuration> ``` ## 配置关键点说明 ### 1. 母版页核心设置 ```xml <pages masterPageFile="~/Site.master" theme="Default"> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <!-- 自定义用户控件 --> <add tagPrefix="custom" tagName="Notification" src="~/Controls/Notification.ascx"/> </controls> </pages> ``` ### 2. 增强的安全配置 ```xml <httpCookies httpOnlyCookies="true" /> <customHeaders> <!-- 安全头 --> <add name="Content-Security-Policy" value="default-src 'self'; script-src 'self' 'unsafe-inline' cdn.example.com; style-src 'self' 'unsafe-inline' cdn.example.com;" /> </customHeaders> ``` ### 3. URL重写优化 ```xml <rewrite> <rules> <rule name="Redirect to HTTPS" stopProcessing="true"> <match url="(.*)" /> <conditions> <add input="{HTTPS}" pattern="^OFF$" /> </conditions> <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="Permanent" /> </rule> <rule name="Hide .aspx Extension" stopProcessing="true"> <match url="^([^.]+)$" /> <conditions> <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" /> </conditions> <action type="Rewrite" url="{R:1}.aspx" /> </rule> </rules> </rewrite> ``` ### 4. 程序集绑定重定向 ```xml <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <!-- 解决程序集版本冲突 --> </assemblyBinding> </runtime> ``` ## 最佳实践建议 1. **开发与生产环境分离** - 在Web.Debug.config和Web.Release.config中配置不同的设置 ```xml <connectionStrings xdt:Transform="Replace"> <add name="DB-NetShopsConnectionString" connectionString="Data Source=PROD_SERVER;Initial Catalog=DB-NetShops;User ID=appuser;Password=prod_password;" providerName="System.Data.SqlClient" /> </connectionStrings> ``` 2. **压缩与缓存优化** ```xml <system.webServer> <urlCompression doStaticCompression="true" doDynamicCompression="true" /> <caching enabled="true" enableKernelCache="true"> <profiles> <add extension=".css" policy="CacheForOneYear" kernelCachePolicy="CacheForOneYear" /> <add extension=".js" policy="CacheForOneYear" kernelCachePolicy="CacheForOneYear" /> </profiles> </caching> </system.webServer> ``` 3. **健康检查端点** ```xml <location path="healthcheck.ashx"> <system.web> <authorization> <allow users="*" /> </authorization> </system.web> </location> ``` ## 母版页技术要点 1. **内容页覆盖机制**: - 任何内容页都可以通过`MasterPageFile`属性覆盖全局设置 ```html <%@ Page MasterPageFile="~/Admin/AdminMaster.master" %> ``` 2. **动态母版页切换**: 在Page_PreInit事件中设置母版页 ```csharp protected void Page_PreInit(object sender, EventArgs e) { if (User.IsInRole("Admin")) this.MasterPageFile = "~/AdminMaster.master"; else this.MasterPageFile = "~/UserMaster.master"; } ``` 3. **母版页属性访问**: 内容页中访问母版页属性需要强类型转换 ```csharp var master = this.Master as Site; if (master != null) { master.SetPageTitle("自定义标题"); } ```
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