How to include ampersand in connection string?

Question

I'm using Entity Framework 4 for a simple app and would like to bake my connection credentials into the following connection string:

<connectionStrings>     <add name="MyEntities"              connectionString="metadata=res://*/MyDataModel.csdl|res://*/MyDataModel.ssdl|res://*/MyDataModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=localhost\DEV;Initial Catalog=MyDB;UserId=myUser;Password=jack&jill;MultipleActiveResultSets=True&quot;"           providerName="System.Data.EntityClient" /> </connectionStrings> 

However, the password (which I cannot change) contains an ampersand. ASP.NET throws: Configuration Error: An error occurred while parsing EntityName. Line XX, position YYY.

If I replace the ampersand in the password with &, I get a SqlException: Login failed for user 'myUser'. Usually this trick works, but I'm guessing that something is failing because this is technically a connection string inside a connection string.

What should I do here? Most of my classes include code like:

using (var context = new MyEntities()) {    // do work } 

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Update: It turns out that the credentials I am using are a domain account, so what I really need is Integrated Security=True in the connection string rather than a password.

Encoding the ampersand as indicated in the accepted answer should work fine, though I haven't tested it.

Answer 1

You'll need to use escape sequences like you would for any XML document, which is all the .config files are.

• Ampersand = & = &
• Greater Than = > = >
• Less Than = < = <
• Apostrophe = ' = '
• Quote = " = "

You can also use the CDATA tag so that you can use these illegal characters

<![CDATA[ and ends with ]]>

<connectionStrings>     <add name="MyEntities" connectionString="         metadata=res://*/MyDataModel.csdl|res://*/MyDataModel.ssdl|res://*/MyDataModel.msl;         provider=System.Data.SqlClient;         provider connection string=&quot;         Data Source=localhost\DEV;         Initial Catalog=MyDB;UserId=myUser;         Password=<![CDATA[jack&jill]]>;         MultipleActiveResultSets=True&quot;"          providerName="System.Data.EntityClient" /> </connectionStrings>