/// <summary>
/// 泛型方法，反射生成UpdateSql语句
/// </summary>
/// <param name="entity">实体类</param>
/// <param name="pkName">主键</param>
/// <param name="where">自定义条件</param>
/// <returns>int</returns>
public static StringBuilder UpdateSql <T>(T entity, string pkName = "", string where = "")
{
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();
StringBuilder sb = new StringBuilder();
sb.Append(" Update ");
sb.Append(table);
sb.Append(" Set ");
bool isFirstValue = true;
foreach (PropertyInfo prop in props)
{
if (!notMappedField.Contains(prop.Name))
{
if (prop.GetValue(entity, null) != null && keyField != prop.Name)
{
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);
}
}
}
}
if (!string.IsNullOrEmpty(pkName))
{
sb.Append(" Where ").Append(pkName).Append("=").Append(DbParameters.CreateDbParmCharacter() + pkName);
}
else if (!string.IsNullOrEmpty(where))
{
sb.Append(" " + where);
}
return(sb);
}
/// <summary>
/// 泛型方法，反射生成UpdateSql语句
/// </summary>
/// <param name="entity">实体类</param>
/// <param name="where">更新条件</param>
/// <returns>int</returns>
public static StringBuilder UpdateSql <T>(T entity, string where = "")
{
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();
StringBuilder sb = new StringBuilder();
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.Kind != DateTimeKind.Unspecified)
{
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);
}
}
}
}
}
sb.Append(" Where ").Append(keyField).Append("=").Append(DbParameters.CreateDbParmCharacter() + keyField);
return(sb);
}
