从C＃中读取Oracle连接字符串

Question

Let's say I have a string

metadata=res://*/Mapping.Models.csdl|res://*/Mapping.Models.ssdl|res://*/Mapping.Models.msl;provider=Oracle.ManagedDataAccess.Client;provider connection string="data source=TESTSERVER;password=pass;persist security info=True;user id=id\"

How can I get the string as below:

data source=TESTSERVER;password=pass;persist security info=True;user id=id

Answer 1

if you want to parse the string mentioned then you can use the EntityConnectionStringBuilder .

There are Properties like ProviderConnectionString which gives you the string you want.

Example

var myEntityConnection = @"metadata=res://*/Mapping.Models.csdl|res://*/Mapping.Models.ssdl|res://*/Mapping.Models.msl;provider=Oracle.ManagedDataAccess.Client;provider connectionstring='""data source=TESTSERVER;password=pass;persist security info=True;user id=id";

var builder = new EntityConnectionStringBuilder(myEntityConnection);
Console.WriteLine(builder.ProviderConnectionString);

Thats all you Need :)

Answer 2

Why do you need to substring connectionstring even that is possible using EntityConnectionStringBuilder as mentioned below :

var connString = new EntityConnectionStringBuilder(ConfigurationManager.ConnectionStrings["ConnectionStringKey"].ConnectionString);

And from it you can retrieve ProviderConnectionString as shown below:

var providerString = connString.ProviderConnectionString;

For Oracle:

For oracle you can use OracleConnectionStringBuilder

Answer 3

如果需要，可以使用正则表达式获取连接字符串：

(data source).*[^"]

Answer 4

Try splitting string by the given delimiter. Then concatenate, the array elements.

string[] stringArray = str.Split(new string[] { "=" }, StringSplitOptions.None);

Answer 5

You can use String.Substring by first seraching the sub-string provider connection string= :

int index = text.IndexOf(@"provider connection string=");
string result = text.Substring(index).Trim('"');

Answer 6

Try this regex:

\"[^\"]*\"

or

\".*?\"

explain :

[^ character_group ]

Negation: Matches any single character that is not in character_group.

*?

Matches the previous element zero or more times, but as few times as possible.

and a sample code:

foreach(Match match in Regex.Matches(inputString, "\"([^\"]*)\""))
Console.WriteLine(match.ToString());

//or in LINQ

var result = from Match match in Regex.Matches(line, "\"([^\"]*)\"") 
         select match.ToString();

Answer 7

You can use SubString logic.

        string strConnection = @"metadata=res://*/Mapping.Models.csdl|res://*/Mapping.Models.ssdl|res://*/Mapping.Models.msl;provider=Oracle.ManagedDataAccess.Client;provider connection string='""data source=TESTSERVER;password=pass;persist security info=True;user id=id";

        strConnection = strConnection.Substring(strConnection.LastIndexOf("data source"));