/// <summary>
/// 创建用户
/// </summary>
/// <param name="connectingString">数据库链接串</param>
/// <param name="entity">实体对象</param>
/// <returns>如果创建成功返回对应的实体对象。</returns>
public static int Create(string connectingString, T entity, string tableName = null)
{
int ret = -1;
try
{
Type t = entity.GetType();
if (string.IsNullOrEmpty(tableName))
{
object[] tables = t.GetCustomAttributes(typeof(TableAttribute), false);
if (tables != null && tables.Length == 1)
{
tableName = (tables[0] as TableAttribute).Name;
}
}
if (tableName != null)
{
string sql = "INSERT INTO " + tableName + "(";
string keys = string.Empty;
string values = string.Empty;
List <SqlParameter> parameters = new List <SqlParameter>();
//遍历字段
FieldInfo[] fields = t.GetFields();
foreach (FieldInfo f in fields)
{
object[] attrs = f.GetCustomAttributes(typeof(FieldAttribute), false);
if (attrs.Length == 1)
{
FieldAttribute fa = attrs[0] as FieldAttribute;
object o = f.GetValue(entity);
if (!fa.AutoCreated)
{
if (fa.AllowNulls && o == null)
{
continue;
}
if (!string.IsNullOrEmpty(keys))
{
keys += ","; values += ",";
}
keys += fa.Name;
values += "@" + fa.Name;
parameters.Add(new SqlParameter("@" + fa.Name, o));
}
}
}
//遍历属性
PropertyInfo[] properties = t.GetProperties();
foreach (PropertyInfo f in properties)
{
object[] attrs = f.GetCustomAttributes(typeof(FieldAttribute), false);
if (attrs.Length == 1)
{
FieldAttribute fa = attrs[0] as FieldAttribute;
object o = f.GetValue(entity, null);
if (!fa.AutoCreated && !fa.Identity)
{
if (fa.AllowNulls && o == null)
{
continue;
}
if (!string.IsNullOrEmpty(keys))
{
keys += ","; values += ",";
}
keys += fa.Name;
values += "@" + fa.Name;
parameters.Add(new SqlParameter("@" + fa.Name, o));
}
}
}
sql = sql + keys + ") VALUES(" + values + ");SELECT SCOPE_IDENTITY();";
ret = DBH.GetInt32(connectingString, CommandType.Text, sql, parameters.ToArray());
}
}
catch { /*TODO:LOG*/ }
return(ret);
}
public static int Update(string connectingString, T entity, string tableName = null)
{
int ret = -1;
Type t = entity.GetType();
if (string.IsNullOrEmpty(tableName))
{
object[] tables = t.GetCustomAttributes(typeof(TableAttribute), false);
if (tables != null && tables.Length == 1)
{
tableName = (tables[0] as TableAttribute).Name;
}
}
if (tableName != null)
{
string sql = "UPDATE " + tableName + " SET ";
string sets = string.Empty;
string where = null;
List <SqlParameter> parameters = new List <SqlParameter>();
//遍历字段
FieldInfo[] fields = t.GetFields();
foreach (FieldInfo f in fields)
{
object[] attrs = f.GetCustomAttributes(typeof(FieldAttribute), false);
if (attrs.Length == 1)
{
FieldAttribute fa = attrs[0] as FieldAttribute;
object value = f.GetValue(entity);
if (!fa.AllowNulls && value == null)
{
continue; //非null字段，值为null不更新该字段
}
if (value is DateTime && DateTime.MinValue.CompareTo(value) == 0)
{
continue;
}
if (fa.AllowNulls && value == null)
{
value = DBNull.Value;
}
if (fa.PrimaryKey)
{
where = " WHERE " + fa.Name + "=@" + fa.Name;
}
else
{
if (!string.IsNullOrEmpty(sets))
{
sets += ",";
}
sets += fa.Name + "=@" + fa.Name;
}
parameters.Add(new SqlParameter("@" + fa.Name, value));
}
}
//遍历属性
PropertyInfo[] properties = t.GetProperties();
foreach (PropertyInfo f in properties)
{
object[] attrs = f.GetCustomAttributes(typeof(FieldAttribute), false);
if (attrs.Length == 1)
{
FieldAttribute fa = attrs[0] as FieldAttribute;
if (!fa.AllowNulls && f.GetValue(entity, null) == null)
{
continue; //非null字段，值为null不更新该字段
}
if (fa.PrimaryKey)
{
where = " WHERE " + fa.Name + "=@" + fa.Name;
}
else
{
if (!string.IsNullOrEmpty(sets))
{
sets += ",";
}
sets += fa.Name + "=@" + fa.Name;
}
parameters.Add(new SqlParameter("@" + fa.Name, f.GetValue(entity, null)));
}
}
sql = sql + sets + where;
ret = DBH.ExecuteText(connectingString, sql, parameters.ToArray());
}
return(ret);
}
/*
* /// <summary>
* ///
* /// </summary>
* /// <param name="oid"></param>
* /// <param name="tableName"></param>
* /// <param name="callback"></param>
* /// <param name="viewCount"></param>
* /// <returns></returns>
* public static T Read(string oid, string tableName, ToEntityCallbackEx callback,bool viewCount)
* {
* T t = default(T) ;
* using (IDataReader dr = DBH.ExecuteReader(SQL.Select(tableName, DF.ALL, " WHERE oid ='" + oid + "'")))
* {
* if (dr != null)
* {
* try
* {
* if (dr.Read())
* {
* t = callback(dr, true);
* if (viewCount) IncView(tableName, oid);
* }
* }
* catch { }finally { dr.Close(); }
* }
* }
*
* return t;
* }
*
* public static T Read(string oid, string tableName, ToEntityCallbackEx callback)
* {
* return Read(oid, tableName, callback, false);
* }
*
* public static T ReadByURL(string urlName, string tableName, ToEntityCallbackEx callback,bool viewCount)
* {
* T t = default(T);
* using (IDataReader dr = DBH.ExecuteReader(SQL.Select(tableName, DF.ALL, " WHERE url_name ='" + urlName + "'")))
* {
* if (dr != null)
* {
* try
* {
* if (dr.Read())
* {
* t = callback(dr, true);
* if (viewCount) IncViewByURL(tableName, urlName);
* }
* }
* catch { }
* finally { dr.Close(); }
* }
* }
*
* return t;
* }
*
* public static T ReadByURL(string oname, string tableName,ToEntityCallbackEx callback)
* {
* return ReadByURL(oname, tableName, callback, false);
* }
*
* public static T ReadWhere(string tableName, string whereSQL, ToEntityCallbackEx callback)
* {
* T t = default(T);
* using (IDataReader dr = DBH.ExecuteReader(SQL.Select(tableName, DF.ALL, whereSQL)))
* {
* if (dr != null)
* {
* try { if (dr.Read()) t = callback(dr, true); }
* catch { }
* finally { dr.Close(); }
* }
* }
* return t;
* }
*
*
*
* public static IList<T> ReadCount(int count,string tableName,string fields,string whereSQL, ToEntityCallbackEx callback)
* {
* IList<T> tList = null;
* using (IDataReader dr = DBH.ExecuteReader(SQL.Select(tableName, "top " + count + " " + fields, whereSQL)))
* {
* if (dr != null)
* {
* try
* {
* tList = new List<T>();
* while (dr.Read()) { T t = callback(dr, false); tList.Add(t); }
* }
* catch { }
* finally { dr.Close(); }
* }
* }
*
* return tList;
* }
*
* public static IList<T> ReadCount(int count, string tableName, string fields, string whereSQL, ToEntityCallback callback)
* {
* IList<T> tList = null;
* using (IDataReader dr = DBH.ExecuteReader(SQL.Select(tableName, "top " + count + " " + fields, whereSQL)))
* {
* if (dr != null)
* {
* try
* {
* tList = new List<T>();
* while (dr.Read()) { T t = callback(dr); tList.Add(t); }
* }
* catch { }
* finally { dr.Close(); }
* }
* }
*
* return tList;
* }
*
*
*
* //C////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
* public static int Create(string storeProc,string[] values)
* {
* return DBH.GetIntValue(CommandType.StoredProcedure,SQL.SPCombine(storeProc, values),null);
* }
*
* //U///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
* public static int Update(string tableName,string[] fields,string[] values,string oid)
* {
* return DBH.GetIntValue(CommandType.Text,SQL.Update(tableName, fields, values, "oid=" + oid),null);
* }
*
* //S//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
* public static int SetState(string tableName, string oid, string state)
* {
* return DBH.GetIntValue(CommandType.Text,SQL.Update(tableName, "state", state, "oid=" + oid),null);
* }
*
* /// <summary>
* /// 增加点击次数
* /// </summary>
* /// <param name="tableName">表名</param>
* /// <param name="oid">表名</param>
* /// <returns></returns>
* public static int IncView(string tableName, string oid)
* {
* return DBH.Inc(tableName, "views", "oid", oid);
* }
*
* private static int IncViewByURL(string tableName, string urlName)
* {
* return DBH.Inc(tableName, "views", "url_name", urlName);
* }
*/
public static T Build(IDataReader dr)
{
T entity = new T();
if (entity != null)
{
Type t = entity.GetType();
IList <string> colNames = GetColumnNames(dr);
//遍历字段
FieldInfo[] fields = t.GetFields();
foreach (FieldInfo f in fields)
{
object[] attrs = f.GetCustomAttributes(typeof(FieldAttribute), false);
if (attrs.Length == 1)
{
FieldAttribute fa = attrs[0] as FieldAttribute;
try
{
if (colNames.Contains(fa.Name))
{
object value = dr[dr.GetOrdinal(fa.Name)];
if (value != null && !(value is DBNull))
{
f.SetValue(entity, value);
}
}
}
catch (Exception) { }
}
}
//遍历属性
PropertyInfo[] properties = t.GetProperties();
foreach (PropertyInfo p in properties)
{
object[] attrs = p.GetCustomAttributes(typeof(FieldAttribute), false);
if (attrs.Length == 1)
{
FieldAttribute fa = attrs[0] as FieldAttribute;
try
{
if (colNames.Contains(fa.Name))
{
object value = dr[dr.GetOrdinal(fa.Name)];
if (value != null && !(value is DBNull))
{
p.SetValue(entity, value, null);
}
}
}
catch (Exception) { }
}
}
}
else
{
throw new Exception(typeof(T).ToString());
}
return(entity);
}
