将日语字符写入表格

Question

When trying to save a string into my DB table, they get saved as question marks.

I have already checked out this question (and many more): Why is sql server storing question mark characters instead of Japanese characters in NVarchar fields?

Unfortunately, nothing wielded any result for me. I have had the Collation set to "SQL_Latin1_General_CP1_CI_AS" at the start, but I changed it to "Japanese_CI_AS" later on. Still no change.

My code looks similar to this (sorry for not having the real code, it's on my laptop):

string query = "INSERT INTO ArticlesTBL (ArticleTitle, ArticleContent, 

ArticleType, ArticleImg, ArticleBrief,  ArticleDateTime, ArticleAuthor, ArticlePublished, ArticleHomeDisplay, ArticleViews)";
query += " VALUES (@ArticleTitle, @ArticleContent, @ArticleType, @ArticleImg, @ArticleBrief, @ArticleDateTime, @ArticleAuthor, @ArticlePublished, @ArticleHomeDisplay, @ArticleViews)";

SqlCommand myCommand = new SqlCommand(query, myConnection);
myCommand.Parameters.AddWithValue("@ArticleTitle", ArticleTitleTextBox.Text);
myCommand.Parameters.AddWithValue("@ArticleContent", ArticleContentTextBox.Text);
// ... other parameters
myCommand.ExecuteNonQuery();

ArticleContent would be the string with the japanese characters.

My database was created on a MS SQL Server 2014 and I'm using Visual Studio 2015 to write this small application.

Answer 1

You have to use the Unicode supporting nvarchar data types. According to MSDN :

If you store character data that reflects multiple languages, always use Unicode data types (nchar, nvarchar, and ntext) instead of the non-Unicode data types (char, varchar, and text).

If you want to use the full UTF-8 code page, you need to use the nvarchar data type.