[ASP.NET][C#]app.config與web.config的增加、修改、刪除操作

[ASP.NET][C#]app.config與web.config的增加、修改、刪除操作

2011/2/21 11:28 |        閱讀數 : 12021 | 我要推薦|         4 Comments | 訂閱

應用程式組態檔，對於asp.net是web.config，對於WindowsForm程式則是App.config(執行檔名稱.exe.config)。組態檔對於程式本身來說，就是基礎和依據，其本質是一個xml檔案，對於組態檔的操作，從.net2.0開始就方常的方便了，提供了System.Web.Configuration與System.Configuration兩個命名空間，要使用它，需要加入參考。

在WindowsForm中使用System.Configuration.ConfigurationManager

在ASP.NET中使用System.Web.Configuration.WebConfigurationManager

對於組態檔內容的讀取，實在是太方便了XD。

實作：

加入組態檔

以一小段App.config的內容來實作：

組態檔的內容如下：

view source

print?

1	<!--?xml version="1.0" encoding="utf-8" ?-->

2	<configuration>

3	<appsettings>

4	<add value="This is A value" key="A">

5

</add>

6	</appsettings>

7	</configuration>

1.讀取值：

Asp.Net：System.Web.Configuration.WebConfigurationManager.AppSettings["A"];

WinForm：System.Configuration.ConfigurationManager.AppSettings["A"];

2.增加

ASP.NET(需要有寫入權限)

view source

print?

1	//Configuration與AppSettingsSection必須引用System.Configuration才可使用！

2	Configuration config = WebConfigurationManager.OpenWebConfiguration(null);

3	AppSettingsSection app = config.AppSettings;

4	app.Settings.Add("B", "This is B value");

5	config.Save(ConfigurationSaveMode.Modified);

WinForm

view source

print?

1	//Configuration與AppSettingsSection必須引用System.Configuration才可使用！

2	Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

3	AppSettingsSection app = config.AppSettings;

4	app.Settings.Add("B", "This is B value");

5	config.Save(ConfigurationSaveMode.Modified);

3.修改

ASP.NET(需要有寫入權限)

view source

print?

1	//Configuration與AppSettingsSection必須引用System.Configuration才可使用！

2	Configuration config = WebConfigurationManager.OpenWebConfiguration(null);

3	AppSettingsSection app = config.AppSettings;

4	//app.Settings.Add("B", "This is B value");

5	app.Settings["A"].Value = "This is not B";

6	config.Save(ConfigurationSaveMode.Modified);

WinForm

view source

print?

1	//Configuration與AppSettingsSection必須引用System.Configuration才可使用！

2	Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

3	AppSettingsSection app = config.AppSettings;

4	//app.Settings.Add("B", "This is B value");

5	app.Settings["A"].Value = "This is not B";

6	config.Save(ConfigurationSaveMode.Modified);

4.刪除

ASP.NET(需要有寫入權限)

view source

print?

1	//Configuration與AppSettingsSection必須引用System.Configuration才可使用！

2	Configuration config = WebConfigurationManager.OpenWebConfiguration(null);

3	AppSettingsSection app = config.AppSettings;

4	//app.Settings.Add("B", "This is B value");

5	//app.Settings["A"].Value = "This is not B";

6	app.Settings.Remove("A");

7	config.Save(ConfigurationSaveMode.Modified);

WinForm

view source

print?

1	//Configuration與AppSettingsSection必須引用System.Configuration才可使用！

2	Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

3	AppSettingsSection app = config.AppSettings;

4	//app.Settings.Add("B", "This is B value");

5	//app.Settings["A"].Value = "This is not B";

6	app.Settings.Remove("A");

7	config.Save(ConfigurationSaveMode.Modified);

以上就是對組態檔的增加/修改/刪除

另外也可以將連線資料庫的連線字串寫在組態檔內方便修改

如下：

組態檔內容：

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print?

1	<configuration>

2	<connectionstrings>

3	<add name="connDB" providername="System.Data.OleDb" connectionstring="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\soft.mdb;Persist Security Info=True">

4	</add></connectionstrings>

5	<appsettings>

6	<add value="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\soft.mdb;Persist Security Info=True" key="connDB2">

7	</add></appsettings>

8	</configuration>

讀取：

view source

print?

1	ConfigurationManager.ConnectionStrings["connDB"].ConnectionString;

2	//讀取name為connDB的連線字串

完畢！

我只是個小小的入門者