Question

我正在使用sql clr应用程序，在与sql集成之后，我收到此错误（对于英语它正在工作但在将Unicodes添加到词典时出现问题）：

**Msg 6522, Level 16, State 2, Line 1
A .NET Framework error occurred during execution of user-defined routine or     aggregate "SqlCompare": 
System.ArgumentException: An item with the same key has already been added.
System.ArgumentException: 
   at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value,      Boolean add)
   at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   at Translate_Class_NUM..ctor()
   at StringPercentageCompare..ctor()
   at UserDefinedFunctions.SqlComparison()**

 here is my code in c#
private   Dictionary<string, string> MyDictionary;
//private string[,] MyArray;

public Translate_Class_NUM()
{
    MyDictionary.Add("?", "01");
    MyDictionary.Add("?", "02");
    MyDictionary.Add("?", "03");
    MyDictionary.Add("?", "04");
    MyDictionary.Add("?", "05")
}

并在sql server代码中 CREATE ASSEMBLY DBDB_DeDuplication 授权dbo 来自＆E; \ Projects \ DBDB_DeDuplication \ DBDB_DeDuplication \ obj \ Debug \ DBDB_DeDuplication.dll＆＃39; WITH PERMISSION_SET =安全 GO

CREATE FUNCTION SqlCompare（）RETURNS nvarchar（50）作为外部名称DBDB_DeDuplication.UserDefinedFunctions.SqlComparison; GO

SELECT dbo.SqlCompare（）; GO

提前致谢

Answer 1

这段代码对我来说很合适：

Dictionary<string, string> dict = new Dictionary<string, string>();
dict.Add("ಅ","01");
dict.Add("ಇ","02");

正如我之前在评论中尝试解释的那样，您的Unicode字符串不能以您期望的方式传递给编译器。有时这可能是由于使用ASCII编码或其他非Unicode支持编码保存的C＃源文件。要保证结果，请使用C＃Unicode文字编码（U + 0000到U + FFFF）。

如果您不知道如何获得等效的Unicode转义序列，则可以使用以下代码：

static string EncodeNonAsciiCharacters( string value )
{
    StringBuilder sb = new StringBuilder();
    foreach( char c in value ) {
        if( c > 127 ) {
            // This character is too big for ASCII
            string encodedValue = "\\u" + ((int) c).ToString( "x4" );
            sb.Append( encodedValue );
        }
        else {
            sb.Append( c );
        }
    }
    return sb.ToString();
}

Console.WriteLine(EncodeNonAsciiCharacters("ಅ"));
\u0c85
Console.WriteLine(EncodeNonAsciiCharacters("ಇ"));
\u0c87

那么您可以将更安全版本的源代码编写为：

Dictionary<string, string> dict = new Dictionary<string, string>();
dict.Add("\u0c85","01");
dict.Add("\u0c87","02");

已在Dictionary中添加具有相同键的项目

1 个答案: