0

我正在制作一个读取 Firebird 数据库并显示数据的 Windows 窗体应用程序。

我正在使用同事推荐的 DLL 文件：FirebirdSql.Data.FirebirdClient.dll

这是我如何读取数据的示例：

class FBConnect
{
    private FbConnection MyConnection= new FbConnection();
    private FbConnectionStringBuilder ConnectionString;

    //Constructor
    public FBConnect()
    {
        ConnectionString= new FbConnectionStringBuilder();
        {
            var withBlock = ConnectionString;
            withBlock.Database = "MyFile.fdb";
            withBlock.ServerType = FbServerType.Embedded;
            withBlock.UserID = "USID";
            withBlock.Password = "Key";
            withBlock.Pooling = true;
        }
        MyConnection.ConnectionString = ConnectionString.ToString();
    }

    public DataTable RunQuery(string query)
    {
        try
        {
            MyConnection.Open();
            if (MyConnection.State == ConnectionState.Open)
            {
                DataTable dt = new DataTable();
                FbDataAdapter da = new FbDataAdapter(query, MyConnection.ConnectionString);
                da.Fill(dt);
                return dt;
            }
            else
            {
                return null;
            }
        }
        catch (FbException err)
        {
            MessageBox.Show(err.Message, "Firebird error " + err.ErrorCode, MessageBoxButtons.OK, MessageBoxIcon.Error);
            return null;
        }
        finally
        {
            MyConnection.Close();
        }
    }
}

然后，从另一个班级，我打电话给：

FBConnect conn = new FBConnect();
dataGridView1.DataSource = conn.RunQuery("SELECT * FROM table1");

它工作得很好，我可以看到数据。当我JOIN在查询中使用 a 时，问题才出现：然后我得到一个异常

Firebird 错误 335544854
CHARACTER SET ISO8859_1 未安装

这可能是什么原因造成的，我该如何解决？

这是我正在使用的查询

SELECT FACTF.CVE_DOC AS "Clave de Documento",  VENDEDOR.NOMBRE AS "Nombre del vendedor" FROM FACTF01 FACTF LEFT JOIN VEND01 VENDEDOR ON VENDEDOR.CVE_VEND=FACTF.CVE_VEND
4

0 回答 0