这个方法是我自己写的。我用了布鲁诺·拉尼克的代码。也许它对某人有用。

 public static string getQueryFromCommand(SqlCommand cmd)
    {
        StringBuilder CommandTxt = new StringBuilder();
        CommandTxt.Append("DECLARE ");
        List<string> paramlst = new List<string>();
        foreach (SqlParameter parms in cmd.Parameters)
        {
            paramlst.Add(parms.ParameterName);
            CommandTxt.Append(parms.ParameterName + " AS ");
            CommandTxt.Append(parms.SqlDbType.ToString());
            CommandTxt.Append(",");
        }

        if (CommandTxt.ToString().Substring(CommandTxt.Length-1, 1) == ",")
            CommandTxt.Remove(CommandTxt.Length-1, 1);
        CommandTxt.AppendLine();
        int rownr = 0;
        foreach (SqlParameter parms in cmd.Parameters)
        {
            string val = String.Empty;
            if (parms.DbType.Equals(DbType.String) || parms.DbType.Equals(DbType.DateTime))
                val = "'" + Convert.ToString(parms.Value).Replace(@"\", @"\\").Replace("'", @"\'") + "'";
            if (parms.DbType.Equals(DbType.Int16) || parms.DbType.Equals(DbType.Int32) || parms.DbType.Equals(DbType.Int64) || parms.DbType.Equals(DbType.Decimal) || parms.DbType.Equals(DbType.Double))
                val = Convert.ToString(parms.Value);

            CommandTxt.AppendLine();
            CommandTxt.Append("SET " + paramlst[rownr].ToString() + " = " + val.ToString());
            rownr += 1;
        }
        CommandTxt.AppendLine();
        CommandTxt.AppendLine();
        CommandTxt.Append(cmd.CommandText);
        return CommandTxt.ToString();
    }

为我的解决方案使用了Flapper的部分代码，它返回整个SQL字符串，包括在MS SQL SMS中运行的参数值。

public string ParameterValueForSQL(SqlParameter sp)
    {
        string retval = "";

        switch (sp.SqlDbType)
        {
            case SqlDbType.Char:
            case SqlDbType.NChar:
            case SqlDbType.NText:
            case SqlDbType.NVarChar:
            case SqlDbType.Text:
            case SqlDbType.Time:
            case SqlDbType.VarChar:
            case SqlDbType.Xml:
            case SqlDbType.Date:
            case SqlDbType.DateTime:
            case SqlDbType.DateTime2:
            case SqlDbType.DateTimeOffset:
                if (sp.Value == DBNull.Value)
                {
                    retval = "NULL";
                }
                else
                {
                    retval = "'" + sp.Value.ToString().Replace("'", "''") + "'";
                }
                break;

            case SqlDbType.Bit:
                if (sp.Value == DBNull.Value)
                {
                    retval = "NULL";
                }
                else
                {
                    retval = ((bool)sp.Value == false) ? "0" : "1";
                }
                break;

            default:
                if (sp.Value == DBNull.Value)
                {
                    retval = "NULL";
                }
                else
                {
                    retval = sp.Value.ToString().Replace("'", "''");
                }
                break;
        }

        return retval;
    }


    public string CommandAsSql(SqlCommand sc)
    {
        string sql = sc.CommandText;

        sql = sql.Replace("\r\n", "").Replace("\r", "").Replace("\n", "");
        sql = System.Text.RegularExpressions.Regex.Replace(sql, @"\s+", " ");

        foreach (SqlParameter sp in sc.Parameters)
        {
            string spName = sp.ParameterName;
            string spValue = ParameterValueForSQL(sp);
            sql = sql.Replace(spName, spValue);
        }

        sql = sql.Replace("= NULL", "IS NULL");
        sql = sql.Replace("!= NULL", "IS NOT NULL");
        return sql;
    }

从参数命令到非参数命令，可以修改

Using cmd As SqlCommand = Connection.CreateCommand
    cmd.CommandText = "UPDATE someTable SET Value = @Value"
    cmd.CommandText &= " WHERE Id = @Id"
    cmd.Parameters.AddWithValue("@Id", 1234)
    cmd.Parameters.AddWithValue("@Value", "myValue")
    cmd.ExecuteNonQuery
End Using

To

Private sub Update( byval myID as Int32, byval myVal as String)
    Using cmd As SqlCommand = Connection.CreateCommand
        cmd.CommandText = "UPDATE someTable SET Value = '" & myVaL & "'" & _
                          " WHERE Id = " & myID  
        cmd.ExecuteNonQuery
    End Using
End sub

如果只是检查结果查询中的参数是如何格式化的，大多数DBMS将允许从无开始查询字面量。因此:

Using cmd As SqlCommand = Connection.CreateCommand
    cmd.CommandText = "SELECT @Value"
    cmd.Parameters.AddWithValue("@Value", "myValue")
    Return cmd.ExecuteScalar
End Using

这样你就可以看到引号是否被加倍等等。

//For Oracle db in the sql text the parameters could be like :ID,:NAME etc.
//This is same as above Seyed Hossein Mirheydari, but slightly improved, 
//this works with parameter names well.
//Further is straight simple one, you need to format for datatypes 
//after query is generated.
    private string GetFullOraQuery(OracleCommand cmd)
    {
        string query = cmd.CommandText;
        foreach (OracleParameter p in cmd.Parameters)
        {
            query = query.Replace(":" + p.ParameterName, ((p.Value == null) ? "" : p.Value.ToString()));
        }
        return query;
    }

为了记录日志，恐怕没有更好的方法了，只能自己构造字符串:

string query = cmd.CommandText;

foreach (SqlParameter p in cmd.Parameters)
{
    query = query.Replace(p.ParameterName, p.Value.ToString());
}