Save UTF8 string to SQL Server

Question

I have a string in UTF8 like:

Thermal Oxide: 0 Å to 40 μm

and I want to save it in SQL Server.

When I save it in data type ntext/nvarchar - it saves like this:

Thermal Oxide: 0 ? to 40 ?m

What can I do?

Answer 1

用N引用带引号的字符串：

INSERT INTO someTable (myField) VALUES (N'Thermal Oxide: 0 Å to 40 μm')

Answer 2

I have a string in UTF8 like:

Actually, no you don't - you have a unicode string. UTF8, however, only applies to how it is encoded, ie storage. If you mean you want to store it, fine; simply: make sure the column you store it in is nvarchar(somelen) (or similar), and that you use parameters to store it. If you just use cmd.Parameters.AddWithValue("paramName", yourString); that'll be fine (for TSQL like insert [tablename] (...fields...) values (..., @foo) etc). Likewise, any ORM / micro-ORM / other database tool will work fine with this, as long as the column is nvarchar(somelen) or similar. For example, with "dapper":

string s = "Thermal Oxide: 0 Å to 40 μm";
connection.Execute("insert [tablename] (colname) values (@s)", new {s});