web.config配置文件使用总结的方法
我们在开发web系统的时候，使用web.config进行配置是司空见惯的，那么web.confg到底是什么呢？什么时候使用web.config呢？有几种使用web.config方式呢？ 如果不太明白的话，那这篇文章就带领大家脑补下。》》首先回答第一个问题，web.config是什么？是一个XML文本文件。用来存储ASP.NETWEB的配置信息。修改不需要重启服务器就可以生效。 》》 然后第二个问题，什么时候使用web.config?网站中很多不确定的可能随时更改的数据都可以写到配置文件里面。 》》有几种使用web.config的方式呢？ 下面就介绍几种常见的：~ connectionStrings配置（这个一般用来配置数据库连接） <connectionStrings><add name="Default" connectionString="Server=.; Database=Inferno;User ID=sa; Password=pwd123;MultipleActiveResultSets=true" providerName="System.Data.SqlClient" />
</connectionStrings>
获取：<font size="2"> string dbStr=ConfigurationManager.ConnectionStrings["Default"].ConnectionString;</font>~appSettings配置（这个一般用来配置不确定的或者需要用户配置的内容） <font size="2"><appSettings>
<add key="webpages:Version" value="3.0.0.0" />
<add key="webpages:Enabled" value="false" />
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings></font>获取<font size="2">string clientValidationEnabled= ConfigurationManager.AppSettings["ClientValidationEnabled"].ToString();</font>~自定义配置（这个一般用户批量配置某些内容）例如，我下面定义了一个jieDian 键值对配置和一个 fileupload 上传文件集合配置其中，上面的UploadConditionHandler我对应的是一个类：（这个类需要继承IConfigurationSectionHandler并实现Create方法）<font size="2">namespace TestProject
{
public class UploadConditionHandler : IConfigurationSectionHandler
{
public UploadConditionHandler() { }
public static NameValueCollection ossrules = ConfigurationManager.GetSection("testSectionGroup/jieDian") as NameValueCollection;
public static Dictionary<string, UploadRequiredParameters> ScreensDictionary = ConfigurationManager.GetSection("testSectionGroup/fileupload") as Dictionary<string, UploadRequiredParameters>;
public object Create(object parent, object configContext, XmlNode section)
{
Dictionary<string, UploadRequiredParameters> screens = new Dictionary<string, UploadRequiredParameters>();
try
{
string name = string.Empty;
string path_rule = string.Empty;
string disk = string.Empty;
string receive_server = string.Empty;
string ext_array = string.Empty;
string max_memory_size = string.Empty;
string enum_bucket_name = string.Empty;
string max_pixel_height = string.Empty;
string max_pixel_width = string.Empty;
foreach (XmlNode childNode in section.ChildNodes)
{
if (childNode.NodeType != XmlNodeType.Element || childNode.Name != "upload")
continue;
if (childNode.Attributes["name"] != null)
{
name = childNode.Attributes["name"].Value;
if (childNode.Attributes["path_rule"] != null)
{
path_rule = childNode.Attributes["path_rule"].Value;
}
if (childNode.Attributes["disk"] != null)
{
disk = childNode.Attributes["disk"].Value;
}
if (childNode.Attributes["receive_server"] != null)
{
receive_server = childNode.Attributes["receive_server"].Value;
}
if (childNode.Attributes["ext_array"] != null)
{
ext_array = childNode.Attributes["ext_array"].Value;
}
if (childNode.Attributes["max_memory_size"] != null)
{
max_memory_size = childNode.Attributes["max_memory_size"].Value;
}
if (childNode.Attributes["enum_bucket_name"] != null)
{
enum_bucket_name = childNode.Attributes["enum_bucket_name"].Value;
}
if (childNode.Attributes["max_height"] != null)
{
max_pixel_height = childNode.Attributes["max_height"].Value;
}
if (childNode.Attributes["max_width"] != null)
{
max_pixel_width = childNode.Attributes["max_width"].Value;
}
UploadRequiredParameters upload = new UploadRequiredParameters();
upload.PathRule = path_rule;
upload.Disk = disk;
upload.ReceiveServer = receive_server;
upload.ExtArray = ext_array;
int maxMemorySize = 0;
if (int.TryParse(max_memory_size, out maxMemorySize))
{
upload.MaxMemorySize = maxMemorySize;
}
upload.EnumBucketName = enum_bucket_name;
int maxPixelHeight = 0;
if (int.TryParse(max_pixel_height, out maxPixelHeight))
{
upload.MaxPixelHeight = maxPixelHeight;
}
int maxPixelWidth = 0;
if (int.TryParse(max_pixel_width, out maxPixelWidth))
{
upload.MaxPixelWidth = maxPixelWidth;
}
screens.Add(name, upload);
}
}
}
catch (Exception ex)
{
throw ex;
}
return screens;
}
}
}</font>好了，上面的步骤完成后，就可以在其它地方调用了： <font size="3">string jieDian1=UploadConditionHandler.ossrules["JieDian1"];
UploadRequiredParameters res = UploadConditionHandler.ScreensDictionary["UploadRules_Mostly"];</font>目前就先介绍这么多啦，有什么疑问的或者需要了解的欢迎留言~这样就可以了，
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