/// <summary> /// 删除一条数据 /// </summary> public bool Delete(int id) { Dapper.Model.article_attribute_field model = GetModel(id);//取得扩展字段实体 using (SqlConnection conn = new SqlConnection(DbHelperSQL.connectionString)) { conn.Open(); using (SqlTransaction trans = conn.BeginTransaction()) { try { //删除所关联的频道数据表相关列 DataTable dt = new DAL.site_channel(databaseprefix).GetFieldList(conn, trans, id).Tables[0]; if (dt.Rows.Count > 0) { foreach (DataRow dr in dt.Rows) { //检查有无该频道数据表和列 int rowsCount = Convert.ToInt32(DbHelperSQL.GetSingle(conn, trans, "select count(1) from syscolumns where id=object_id('" + databaseprefix + DTKeys.TABLE_CHANNEL_ARTICLE + dr["name"].ToString() + "') and name='" + model.name + "'")); if (rowsCount > 0) { //删除频道数据表一列 DbHelperSQL.ExecuteSql(conn, trans, "alter table " + databaseprefix + DTKeys.TABLE_CHANNEL_ARTICLE + dr["name"].ToString() + " drop column " + model.name); } } } //删除频道关联字段表 StringBuilder strSql1 = new StringBuilder(); strSql1.Append("delete from " + databaseprefix + "site_channel_field"); strSql1.Append(" where field_id=@field_id"); SqlParameter[] parameters1 = { new SqlParameter("@field_id", SqlDbType.Int, 4) }; parameters1[0].Value = id; DbHelperSQL.ExecuteSql(conn, trans, strSql1.ToString(), parameters1); //删除扩展字段主表 StringBuilder strSql = new StringBuilder(); strSql.Append("delete from " + databaseprefix + "article_attribute_field"); strSql.Append(" where id=@id"); SqlParameter[] parameters = { new SqlParameter("@id", SqlDbType.Int, 4) }; parameters[0].Value = id; DbHelperSQL.ExecuteSql(conn, trans, strSql.ToString(), parameters); trans.Commit();//提交事务 } catch { trans.Rollback();//回滚事务 return(false); } } } return(true); }
/// <summary> /// 得到一个对象实体 /// </summary> public Dapper.Model.article_attribute_field GetModel(int id) { StringBuilder strSql = new StringBuilder(); StringBuilder str1 = new StringBuilder(); Dapper.Model.article_attribute_field model = new Dapper.Model.article_attribute_field(); //利用反射获得属性的所有公共属性 Type modelType = model.GetType(); PropertyInfo[] pros = modelType.GetProperties(); foreach (PropertyInfo p in pros) { str1.Append(p.Name + ",");//拼接字段 } strSql.Append("select top 1 " + str1.ToString().Trim(',')); strSql.Append(" from " + databaseprefix + "article_attribute_field"); strSql.Append(" where id=@id"); SqlParameter[] parameters = { new SqlParameter("@id", SqlDbType.Int, 4) }; parameters[0].Value = id; DataTable dt = DbHelperSQL.Query(strSql.ToString(), parameters).Tables[0]; if (dt.Rows.Count > 0) { for (int i = 0; i < dt.Rows[0].Table.Columns.Count; i++) { //查找实体是否存在列表相同的公共属性 PropertyInfo proInfo = modelType.GetProperty(dt.Rows[0].Table.Columns[i].ColumnName); if (proInfo != null && dt.Rows[0][i] != DBNull.Value) { proInfo.SetValue(model, dt.Rows[0][i], null);//用索引值设置属性值 } } return(model); } else { return(null); } }
/// <summary> /// 增加一条数据 /// </summary> public int Add(Dapper.Model.article_attribute_field model) { StringBuilder strSql = new StringBuilder(); StringBuilder str1 = new StringBuilder(); //数据字段 StringBuilder str2 = new StringBuilder(); //数据参数 //利用反射获得属性的所有公共属性 PropertyInfo[] pros = model.GetType().GetProperties(); List <SqlParameter> paras = new List <SqlParameter>(); strSql.Append("insert into " + databaseprefix + "article_attribute_field("); foreach (PropertyInfo pi in pros) { //如果不是主键则追加sql字符串 if (!pi.Name.Equals("id")) { //判断属性值是否为空 if (pi.GetValue(model, null) != null) { str1.Append(pi.Name + ","); //拼接字段 str2.Append("@" + pi.Name + ","); //声明参数 paras.Add(new SqlParameter("@" + pi.Name, pi.GetValue(model, null))); //对参数赋值 } } } strSql.Append(str1.ToString().Trim(',')); strSql.Append(") values ("); strSql.Append(str2.ToString().Trim(',')); strSql.Append(") "); strSql.Append(";select @@IDENTITY;"); object obj = DbHelperSQL.GetSingle(strSql.ToString(), paras.ToArray()); if (obj == null) { return(0); } else { return(Convert.ToInt32(obj)); } }
/// <summary> /// 更新一条数据 /// </summary> public bool Update(Dapper.Model.article_attribute_field model) { Dapper.Model.article_attribute_field oldModel = GetModel(model.id);//取到旧的数据 using (SqlConnection conn = new SqlConnection(DbHelperSQL.connectionString)) { conn.Open(); using (SqlTransaction trans = conn.BeginTransaction()) { try { //修改主表信息 StringBuilder strSql = new StringBuilder(); StringBuilder str1 = new StringBuilder(); //利用反射获得属性的所有公共属性 PropertyInfo[] pros = model.GetType().GetProperties(); List <SqlParameter> paras = new List <SqlParameter>(); strSql.Append("update " + databaseprefix + "article_attribute_field set "); foreach (PropertyInfo pi in pros) { //如果不是主键则追加sql字符串 if (!pi.Name.Equals("id")) { //判断属性值是否为空 if (pi.GetValue(model, null) != null) { str1.Append(pi.Name + "=@" + pi.Name + ","); //声明参数 paras.Add(new SqlParameter("@" + pi.Name, pi.GetValue(model, null))); //对参数赋值 } } } strSql.Append(str1.ToString().Trim(',')); strSql.Append(" where id=@id "); paras.Add(new SqlParameter("@id", model.id)); DbHelperSQL.ExecuteSql(conn, trans, strSql.ToString(), paras.ToArray()); //检查字段名和类型有无变化 if (oldModel.name.ToLower() != model.name.ToLower() || oldModel.data_type.ToLower() != model.data_type.ToLower()) { DataTable dt = new DAL.site_channel(databaseprefix).GetFieldList(conn, trans, model.id).Tables[0]; if (dt.Rows.Count > 0) { foreach (DataRow dr in dt.Rows) { //检查有无该频道数据表和列 int rowsCount = Convert.ToInt32(DbHelperSQL.GetSingle(conn, trans, "select count(1) from syscolumns where id=object_id('" + databaseprefix + DTKeys.TABLE_CHANNEL_ARTICLE + dr["name"].ToString() + "') and name='" + oldModel.name + "'")); if (rowsCount > 0) { //修改列数据类型 if (oldModel.data_type.ToLower() != model.data_type.ToLower()) { DbHelperSQL.ExecuteSql(conn, trans, "alter table " + databaseprefix + DTKeys.TABLE_CHANNEL_ARTICLE + dr["name"].ToString() + " alter column " + oldModel.name + " " + model.data_type); } //修改列名 if (oldModel.name.ToLower() != model.name.ToLower()) { DbHelperSQL.ExecuteSql(conn, trans, "exec sp_rename '" + databaseprefix + DTKeys.TABLE_CHANNEL_ARTICLE + dr["name"].ToString() + "." + oldModel.name + "','" + model.name + "','column'"); } } } } } trans.Commit();//提交事务 } catch { trans.Rollback();//回滚事务 return(false); } } } return(true); }