/// <summary>
/// 拼接 查询最大数 SQL语句
/// </summary>
/// <param name="propertyName">属性字段</param>
/// <returns></returns>
public static StringBuilder SelectMaxSql <T>(string propertyName) where T : new()
{
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
return(new StringBuilder("SELECT MAX(" + propertyName + ") FROM " + table + " WHERE 1=1 "));
}
/// <summary>
/// 泛型方法，反射生成InsertSql语句
/// </summary>
/// <param name="entity">实体类</param>
/// <returns>int</returns>
public static string InsertSql <T>(T entity)
{
string cacheKey = string.Format("T-SQL:INSERT:{0}:{1}", typeof(T).Name, typeof(T).FullName.GetMd5Code());
string cache = CacheFactory.GetCache().Get <string>(cacheKey);
if (string.IsNullOrEmpty(cache))
{
StringBuilder sb = new StringBuilder();
Type type = entity.GetType();
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
//获取不做映射的字段
List <string> notMappedField = EntityAttributeHelper.GetNotMappedFields <T>();
sb.Append(" INSERT INTO ");
sb.Append(table);
sb.Append("(");
StringBuilder sp = new StringBuilder();
StringBuilder sbPrame = new StringBuilder();
PropertyInfo[] props = type.GetProperties();
foreach (PropertyInfo prop in props)
{
if (!notMappedField.Contains(prop.Name))
{
object value = prop.GetValue(entity, null);
if (value != null)
{
if (value.GetType() == typeof(DateTime))
{
var time = (DateTime)value;
if (time.Ticks != 0 && time != DateTime.MinValue && time != SqlDateTime.MinValue.Value)
{
sbPrame.Append(",[" + prop.Name + "]");
sp.Append("," + DbParameters.CreateDbParmCharacter() + "" + (prop.Name));
}
}
else
{
sbPrame.Append(",[" + prop.Name + "]");
sp.Append("," + DbParameters.CreateDbParmCharacter() + "" + (prop.Name));
}
}
else
{
if (prop.PropertyType.IsNullableType())
{
sbPrame.Append(",[" + prop.Name + "]");
sp.Append("," + DbParameters.CreateDbParmCharacter() + "" + (prop.Name));
}
}
}
}
sb.Append(sbPrame.ToString().Substring(1, sbPrame.ToString().Length - 1) + ") VALUES (");
sb.Append(sp.ToString().Substring(1, sp.ToString().Length - 1) + ")");
cache = sb.ToString();
CacheFactory.GetCache().Add(cacheKey, cache);
}
return(cache);
}
/// <summary>
/// 拼接 查询条数 SQL语句
/// </summary>
/// <returns></returns>
public static StringBuilder SelectCountSql <T>() where T : new()
{
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
return(new StringBuilder("SELECT Count(1) FROM " + table + " WHERE 1=1 "));
}
/// <summary>
/// 拼接删除SQL语句
/// </summary>
/// <param name="entity">实体类</param>
/// <returns></returns>
public static string DeleteSql <T>(T entity)
{
string cacheKey = string.Format("T-SQL:DELETE:{0}:{1}", typeof(T).Name, typeof(T).FullName.GetMd5Code());
string cache = CacheFactory.GetCache().Get <string>(cacheKey);
if (string.IsNullOrEmpty(cache))
{
Type type = entity.GetType();
PropertyInfo[] props = type.GetProperties();
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
StringBuilder sb = new StringBuilder("DELETE FROM " + table + " WHERE 1=1");
foreach (PropertyInfo prop in props)
{
if (prop.GetValue(entity, null) != null)
{
sb.Append(" AND " + prop.Name + " = " + DbParameters.CreateDbParmCharacter() + "" + prop.Name + "");
}
}
cache = sb.ToString();
CacheFactory.GetCache().Add(cacheKey, cache);
}
return(cache);
}
/// <summary>
/// 拼接删除SQL语句
/// </summary>
/// <param name="where">删除条件</param>
/// <returns></returns>
public static StringBuilder DeleteSql <T>(string where)
{
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
if (string.IsNullOrEmpty(where))
{
where = "1 = 1";
}
return(new StringBuilder("DELETE FROM " + table + " " + where));
}
/// <summary>
/// 拼接 查询条数 SQL语句
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="where"></param>
/// <returns></returns>
public static StringBuilder SelectCountSql <T>(string where) where T : new()
{
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
if (!string.IsNullOrEmpty(where))
{
if (!where.ToLower().Contains("where"))
{
where = " WHERE " + where;
}
}
return(new StringBuilder("SELECT Count(1) FROM " + table + " " + where));
}
/// <summary>
/// 拼接 查询 SQL语句
/// </summary>
/// <param name="top">显示条数</param>
/// <returns></returns>
public static StringBuilder SelectSql <T>(int top) where T : new()
{
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
PropertyInfo[] props = EntityAttributeHelper.GetProperties(typeof(T));
StringBuilder sbColumns = new StringBuilder();
foreach (PropertyInfo prop in props)
{
sbColumns.Append(prop.Name + ",");
}
if (sbColumns.Length > 0)
{
sbColumns.Remove(sbColumns.ToString().Length - 1, 1);
}
string strSql = string.Format("SELECT TOP {0} {1} FROM {2} WHERE 1=1 ", top, sbColumns.ToString(), table);
return(new StringBuilder(strSql));
}
/// <summary>
/// 拼接 查询 SQL语句，自定义条件
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="where">条件</param>
/// <param name="allFieid">是否查询所有字段</param>
/// <returns></returns>
public static string SelectSql <T>(string where, bool allFieid = false) where T : class
{
string cacheKey = string.Format("T-SQL:SELECT:{0}:{1}", typeof(T).Name, string.Format("{0}{1}", typeof(T).FullName, allFieid.ToString()).GetMd5Code());
string cache = CacheFactory.GetCache().Get <string>(cacheKey);
if (string.IsNullOrEmpty(cache))
{
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
PropertyInfo[] props = EntityAttributeHelper.GetProperties(typeof(T));
StringBuilder sbColumns = new StringBuilder();
if (allFieid)
{
sbColumns.Append(" * ");
}
else
{
foreach (PropertyInfo prop in props)
{
//string propertytype = prop.PropertyType.ToString();
sbColumns.Append("[" + prop.Name + "],");
}
if (sbColumns.Length > 0)
{
sbColumns.Remove(sbColumns.ToString().Length - 1, 1);
}
}
if (string.IsNullOrWhiteSpace(where))
{
where = " WHERE 1 = 1";
}
string strSql = string.Format("SELECT {0} FROM {1} {2}", sbColumns.ToString(), table, where);
cache = strSql.ToString();
CacheFactory.GetCache().Add(cacheKey, cache);
}
return(cache);
}
/// <summary>
/// 泛型方法，反射生成UpdateSql语句
/// </summary>
/// <param name="entity">实体类</param>
/// <returns>int</returns>
public static string UpdateSql <T>(object entity)
{
string cacheKey = string.Format("T-SQL:UPDATE:{0}:{1}", typeof(T).Name, typeof(T).FullName.GetMd5Code());
string cache = CacheFactory.GetCache().Get <string>(cacheKey);
if (string.IsNullOrEmpty(cache))
{
StringBuilder sb = new StringBuilder();
Type type = entity.GetType();
//表名
string table = EntityAttributeHelper.GetEntityTable <T>();
//主键
string keyField = EntityAttributeHelper.GetEntityKey <T>();
//获取不做映射的字段
List <string> notMappedField = EntityAttributeHelper.GetNotMappedFields <T>();
PropertyInfo[] props = type.GetProperties();
sb.Append(" UPDATE ");
sb.Append(table);
sb.Append(" SET ");
bool isFirstValue = true;
foreach (PropertyInfo prop in props)
{
if (!notMappedField.Contains(prop.Name))
{
object value = prop.GetValue(entity, null);
if (value != null && keyField != prop.Name)
{
if (value.GetType() == typeof(DateTime))
{
var time = (DateTime)value;
if (time.Ticks != 0 && time != DateTime.MinValue && time != SqlDateTime.MinValue.Value)
{
if (isFirstValue)
{
isFirstValue = false;
sb.Append("[" + prop.Name + "]");
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
else
{
sb.Append(",[" + prop.Name + "]");
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
}
}
else
{
if (isFirstValue)
{
isFirstValue = false;
sb.Append("[" + prop.Name + "]");
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
else
{
sb.Append(",[" + prop.Name + "]");
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
}
}
else
{
if (prop.PropertyType.IsNullableType())
{
sb.Append(",[" + prop.Name + "]");
sb.Append("=");
sb.Append(DbParameters.CreateDbParmCharacter() + prop.Name);
}
}
}
}
sb.Append(" WHERE ").Append(keyField).Append("=").Append(DbParameters.CreateDbParmCharacter() + keyField);
cache = sb.ToString();
CacheFactory.GetCache().Add(cacheKey, cache);
}
return(cache);
}
