|
|
#if DEBUG
/* 2021.11.28 */
using Apewer; using System; using System.Collections.Generic; using System.Data; using System.Data.Common; using System.Text;
using static Apewer.Source.SourceUtility; using System.Data.SqlClient;
#if NETFRAMEWORK
using System.Data.Sql; #endif
namespace Apewer.Source {
/// <summary></summary>
[Serializable]
public class SqlClientThin : DbClient, IDbClient {
#region
string _str = null;
/// <summary>使用连接字符串创建数据库连接实例。</summary>
public SqlClientThin(string connectionString, Timeout timeout = null) : base(timeout) { _str = connectionString ?? ""; }
/// <summary>使用连接凭据创建数据库连接实例。</summary>
public SqlClientThin(string address, string store, string user, string pass, Timeout timeout = null) : base(timeout) { if (timeout == null) timeout = Timeout.Default;
var a = address ?? ""; var s = store ?? ""; var u = user ?? ""; var p = pass ?? ""; var cs = $"data source = {a}; initial catalog = {s}; "; if (string.IsNullOrEmpty(u)) cs += "integrated security = sspi; "; else { cs += $"user id = {u}; "; if (!string.IsNullOrEmpty(p)) cs += $"password = {p}; "; } cs += $"connection timeout = {timeout.Connect}; ";
_str = cs; }
/// <summary>为 Ado 创建连接字符串。</summary>
protected override string NewConnectionString() => _str;
/// <summary>为 Ado 创建 IDbConnection 对象。</summary>
protected override IDbConnection NewConnection() => new SqlConnection();
/// <summary>为 Ado 创建 IDbCommand 对象。</summary>
protected override IDbCommand NewCommand() => new SqlCommand();
/// <summary>为 Ado 创建 IDataAdapter 对象。</summary>
protected override IDataAdapter NewDataAdapter(IDbCommand command) => new SqlDataAdapter((SqlCommand)command);
#endregion
#region ORM
/// <summary>查询数据库中的所有表名。</summary>
public override string[] TableNames() => TextColumn("select [name] from [sysobjects] where [type] = 'u' order by [name]; ");
/// <summary>查询数据库实例中的所有数据库名。</summary>
public override string[] StoreNames() => TextColumn("select [name] from [master]..[sysdatabases] order by [name]; ", new string[] { "master", "model", "msdb", "tempdb" });
/// <summary>查询表中的所有列名。</summary>
public override string[] ColumnNames(string tableName) => TextColumn($"select [name] from [syscolumns] where [id] = object_id('{tableName}'); ");
/// <summary>获取列信息。</summary>
public override ColumnInfo[] ColumnsInfo(string tableName) { if (tableName.IsEmpty()) throw new ArgumentNullException(nameof(tableName)); var sql = $"select name, xtype, length from syscolumns where id = object_id('{tableName}') "; using (var query = Query(sql)) { var ab = new ArrayBuilder<ColumnInfo>(); for (var i = 0; i < query.Rows; i++) { var info = new ColumnInfo(); info.Name = query.Text(i, "name"); info.Type = XType(query.Int32(i, "xtype")); info.Length = query.Int32(i, "length"); ab.Add(info); } return ab.Export(); } }
/// <summary>创建表,当表不存在时创建表,当现存表中缺少模型中属性对应的列时增加列。成功时返回空字符串,发生异常时返回异常信息。</summary>
public override string Initialize(Type model) { var structure = TableStructure.Parse(model); if (structure == null) return "无法解析记录模型。";
// 连接数据库。
var connect = Connect(); if (connect.NotEmpty()) return connect;
// 检查现存表。
var exists = false; var tables = TableNames(); if (tables.Length > 0) { var lower = structure.Name.ToLower(); foreach (var table in tables) { if (TextUtility.IsBlank(table)) continue; if (table.ToLower() == lower) { exists = true; break; } } }
if (exists) { // 获取已存在的列名。
var columns = ColumnNames(structure.Name); if (columns.Length > 0) { var lower = new List<string>(); foreach (var column in columns) { if (TextUtility.IsBlank(column)) continue; lower.Add(column.ToLower()); } columns = lower.ToArray(); }
// 增加列。
foreach (var column in structure.Columns) { // 检查 Independent 特性。
if (structure.Independent && column.Independent) continue;
// 去重。
var lower = column.Field.ToLower(); if (columns.Contains(lower)) continue;
var type = Declaration(column); if (string.IsNullOrEmpty(type)) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
var sql = TextUtility.Merge("alter table [", structure.Name, "] add ", type, "; "); var execute = Execute(sql); if (execute.Success == false) return execute.Message; } return TextUtility.Empty; } else { var sqlcolumns = new List<string>(); foreach (var column in structure.Columns) { // 检查 Independent 特性。
if (structure.Independent && column.Independent) continue;
var type = Declaration(column); if (!column.Independent && column.Property.Name == "Key") type = type + " primary key";
if (string.IsNullOrEmpty(type)) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。"); sqlcolumns.Add(type); } var sql = TextUtility.Merge("create table [", structure.Name, "](", string.Join(", ", sqlcolumns.ToArray()), "); "); var execute = Execute(sql); if (execute.Success) return TextUtility.Empty; return execute.Message; } }
/// <summary>插入记录。返回错误信息。</summary>
public override string Insert(object record, string table = null) { if (record == null) return "参数无效。"; FixProperties(record);
var structure = TableStructure.Parse(record.GetType()); if (structure == null) return "无法解析记录模型。"; if (string.IsNullOrEmpty(table)) table = structure.Name; if (string.IsNullOrEmpty(table)) return "表名称无效。";
var ps = structure.CreateParameters(record, Parameter, null); var psc = ps.Length; if (psc < 1) return "数据模型不包含字段。";
var names = new List<string>(psc); var values = new List<string>(psc); foreach (var column in ps) { //names.Add(TextGenerator.Merge("[", column, "]"));
names.Add(TextUtility.Merge(column)); values.Add("@" + column); } var sb = new StringBuilder(); sb.Append("insert into [", table, "](", string.Join(", ", names.ToArray()), ") "); sb.Append("values(", string.Join(", ", values.ToArray()), "); "); var sql = sb.ToString();
var execute = Execute(sql, ps); if (execute.Success) return TextUtility.Empty; return execute.Message; }
/// <summary>更新记录,实体中的 Key 属性不被更新。返回错误信息。</summary>
/// <remarks>无法更新带有 Independent 特性的模型(缺少 Key 属性)。</remarks>
public override string Update(IRecord record, string table = null) { if (record == null) return "参数无效。"; FixProperties(record); SetUpdated(record);
var structure = TableStructure.Parse(record.GetType()); if (structure == null) return "无法解析记录模型。"; if (structure.Independent) return "无法更新带有 Independent 特性的模型。"; if (string.IsNullOrEmpty(table)) table = structure.Name; if (string.IsNullOrEmpty(table)) return "表名称无效。";
var ps = structure.CreateParameters(record, Parameter, null); var psc = ps.Length; if (psc < 1) return "数据模型不包含字段。";
var items = new List<string>(); foreach (var p in ps) { var pn = p.ParameterName; items.Add(TextUtility.Merge("[", pn, "] = @", pn)); } var key = record.Key.SafeKey(); var sql = TextUtility.Merge("update [", table, "] set ", string.Join(", ", items.ToArray()), " where [_key]='", key, "'; ");
var execute = Execute(sql, ps); if (execute.Success) return TextUtility.Empty; return execute.Message; }
/// <summary>获取记录。</summary>
public override Result<object[]> Query(Type model, long flag = 0) => SourceUtility.Query(this, model, (tn) => { if (flag == 0) return $"select * from [{tn}]; "; return $"select * from [{tn}] where _flag={flag}; "; });
/// <summary>获取记录。</summary>
public override Result<T[]> Query<T>(long flag = 0) => SourceUtility.Query<T>(this, (tn) => { if (flag == 0) return $"select * from [{tn}]; "; return $"select * from [{tn}] where _flag={flag}; "; });
/// <summary>获取具有指定 Key 的记录。</summary>
public override Result<object> Get(Type model, string key, long flag = 0) => SourceUtility.Get(this, model, key, (tn, sk) => { if (flag == 0) return $"select top 1 * from [{tn}] _key='{sk}'; "; return $"select top 1 * from [{tn}] where _key='{sk}' and _key='{sk}'; "; });
/// <summary>获取具有指定 Key 的记录。</summary>
public override Result<T> Get<T>(string key, long flag = 0) => SourceUtility.Get<T>(this, key, (tn, sk) => { if (flag == 0) return $"select top 1 * from [{tn}] _key='{sk}'; "; return $"select top 1 * from [{tn}] where _key='{sk}' and _key='{sk}'; "; });
/// <summary>查询有效的 Key 值。</summary>
public override Result<string[]> Keys(Type model, long flag = 0) => SourceUtility.Keys(this, model, (tn) => { if (flag == 0) return $"select _key from [{tn}]; "; return $"select _key from [{tn}] where _flag={flag}; "; });
/// <summary>查询有效的 Key 值。</summary>
public override Result<string[]> Keys<T>(long flag = 0) => Keys(typeof(T), flag);
#endregion
#region public static
#if NET20 || NET40
/// <summary>枚举本地网络中服务器的名称。</summary>
public static SqlServerSource[] EnumerateServer() { var list = new List<SqlServerSource>();
// 表中列名:ServerName、InstanceName、IsClustered、Version。
using (var query = new Query(SqlDataSourceEnumerator.Instance.GetDataSources())) { for (int i = 0; i < query.Rows; i++) { var item = new SqlServerSource(); item.ServerName = query.Text(i, "ServerName"); list.Add(item); } } return list.ToArray(); }
#endif
/// <summary>指定的连接凭据是否符合连接要求,默认指定 master 数据库。</summary>
public static bool Proven(string address, string user, string pass) => Proven(address, "master", user, pass);
/// <summary>指定的连接凭据是否符合连接要求。</summary>
public static bool Proven(string address, string store, string user, string pass) { var a = string.IsNullOrEmpty(address); var s = string.IsNullOrEmpty(store); var u = string.IsNullOrEmpty(user); var p = string.IsNullOrEmpty(pass); if (a) return false; if (s) return false; if (u && !p) return false; return true; }
/// <summary>创建参数。</summary>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="InvalidOperationException"></exception>
static SqlParameter Parameter(Parameter parameter) { if (parameter == null) throw new InvalidOperationException("参数无效。"); return Parameter(parameter.Name, parameter.Type, parameter.Size, parameter.Value); }
/// <summary>创建参数。</summary>
public static SqlParameter Parameter(string name, ColumnType type, int size, object value) { var vname = TextUtility.Trim(name); if (TextUtility.IsBlank(vname)) return null;
var vtype = SqlDbType.BigInt; switch (type) { case ColumnType.Bytes: vtype = SqlDbType.Image; break; case ColumnType.Integer: vtype = SqlDbType.BigInt; break; case ColumnType.Float: vtype = SqlDbType.Float; break; case ColumnType.DateTime: vtype = SqlDbType.DateTime; break; case ColumnType.VarChar: case ColumnType.VarChar191: case ColumnType.VarCharMax: vtype = SqlDbType.VarChar; break; case ColumnType.NVarChar: case ColumnType.NVarChar191: case ColumnType.NVarCharMax: vtype = SqlDbType.NVarChar; break; case ColumnType.Text: vtype = SqlDbType.Text; break; case ColumnType.NText: vtype = SqlDbType.NText; break; default: throw new InvalidOperationException(TextUtility.Merge("类型 ", type.ToString(), " 不受支持。")); }
var vsize = size; switch (type) { case ColumnType.VarChar: vsize = NumberUtility.Restrict(vsize, 0, 8000); break; case ColumnType.NVarChar: vsize = NumberUtility.Restrict(vsize, 0, 4000); break; case ColumnType.VarChar191: case ColumnType.NVarChar191: vsize = NumberUtility.Restrict(vsize, 0, 191); break; default: vsize = 0; break; }
var vvalue = value; if (vvalue is string && vvalue != null && vsize > 0) { vvalue = TextUtility.Left((string)vvalue, vsize); }
var parameter = new SqlParameter(); parameter.ParameterName = vname; parameter.SqlDbType = vtype; parameter.Value = vvalue; if (vsize > 0) parameter.Size = vsize; return parameter; }
/// <summary>创建参数。</summary>
public static SqlParameter Parameter(string name, SqlDbType type, int size, object value) { if (value is string && value != null && size > 0) { value = TextUtility.Left((string)value, (int)size); }
var p = new SqlParameter(); p.ParameterName = name ?? ""; p.SqlDbType = type; p.Size = size; p.Value = value; return p; }
/// <summary>创建参数。</summary>
public static SqlParameter Parameter(string name, SqlDbType type, object value) { var p = new SqlParameter(); p.ParameterName = name ?? ""; p.SqlDbType = type; p.Value = value; return p; }
static string Declaration(ColumnAttribute column) { var type = TextUtility.Empty; var vcolumn = column; var length = Math.Max(0, vcolumn.Length); switch (vcolumn.Type) { case ColumnType.Integer: type = "bigint"; break; case ColumnType.Float: type = "float"; break; case ColumnType.Bytes: type = "image"; break; case ColumnType.DateTime: type = "datetime"; break; case ColumnType.VarChar: type = TextUtility.Merge("varchar(", Math.Min(8000, length).ToString(), ")"); break; case ColumnType.VarChar191: type = TextUtility.Merge("varchar(191)"); break; case ColumnType.VarCharMax: type = TextUtility.Merge("varchar(max)"); break; case ColumnType.Text: type = TextUtility.Merge("text"); break; case ColumnType.NVarChar: type = TextUtility.Merge("nvarchar(", Math.Min(4000, length).ToString(), ")"); break; case ColumnType.NVarChar191: type = TextUtility.Merge("nvarchar(191)"); break; case ColumnType.NVarCharMax: type = TextUtility.Merge("nvarchar(max)"); break; case ColumnType.NText: type = TextUtility.Merge("ntext"); break; default: return TextUtility.Empty; } return TextUtility.Merge("[", vcolumn.Field, "] ", type); }
static string XType(int xtype) { switch (xtype) { case 34: return "image"; case 35: return "text"; case 36: return "uniqueidentifier"; case 48: return "tinyint"; case 52: return "smallint"; case 56: return "int"; case 58: return "smalldatetime"; case 59: return "real"; case 60: return "money"; case 61: return "datetime"; case 62: return "float"; case 98: return "sql_variant"; case 99: return "ntext"; case 104: return "bit"; case 106: return "decimal"; case 108: return "numeric"; case 122: return "smallmoney"; case 127: return "bigint"; case 165: return "varbinary"; case 167: return "varchar"; case 173: return "binary"; case 175: return "char"; case 189: return "timestamp"; case 231: return "nvarchar"; case 239: return "nchar"; case 241: return "xml"; } return null; }
#endregion
}
}
#endif
|