/// <summary>
/// 查询数据列表
/// </summary>
/// <typeparam name="T">查询对象</typeparam>
/// <param name="con">数据库链接</param>
/// <param name="fieldParam">查询字段,查询全部为null,查询某个字段，如：new {name="",id=0,status=0}</param>
/// <param name="where">查询条件where sql语句</param>
/// <param name="whereParam">查询条件参数值，如：new {name="danny",status=1}</param>
/// <param name="orderBy">排序字段 ,正序为true，降序为false，如：new {sort_id=false,id=true}</param>
/// <param name="pagesize">每页条数</param>
/// <param name="pageindex">当前页</param>
/// <param name="totalCount">返回总条数</param>
/// <returns></returns>
public static List <T> GetList <T>(this SqlConnection con, object fieldParam, object where, object whereParam, object orderBy, int pagesize, int pageindex, out int totalCount)
{
var table_name = typeof(T).Name;
#region 查询字段
var fields = "*";
StringBuilder sql = new StringBuilder();
if (fieldParam != null)
{
fields = "";
var t = fieldParam.GetType();
var properties = t.GetProperties();
for (int i = 0; i < properties.Length; i++)
{
if (i > 0)
{
fields += ",";
}
fields += properties[i].Name;
}
}
sql.Append($"select {fields} from [{table_name}] ");
#endregion
#region 查询条件
if (where != null)
{
sql.Append($" where {where.ToString()}");
//var t = whereParam.GetType();
//var properties = t.GetProperties();
//for (int i = 0; i < properties.Length; i++)
//{
// if (i > 0)
// sql.Append($" and ");
// sql.Append($" {properties[i].Name}=@{properties[i].Name}");
//}
}
#endregion
#region 排序字段
var order = "";
if (orderBy != null)
{
var t = orderBy.GetType();
var properties = t.GetProperties();
for (int i = 0; i < properties.Length; i++)
{
if (i > 0)
{
order += ",";
}
order += $" {properties[i].Name} {((Utils.ObjToBool(properties[i].GetValue(orderBy), false)) ? "asc" : "desc")}";
}
}
else
{
var t = typeof(T);
var properties = t.GetProperties();
order += $" {properties[0].Name} asc";
}
#endregion
var safeSql = GetAntiXssSql(sql.ToString());
totalCount = con.Query <int>(PagingHelper.CreateCountingSql(safeSql), whereParam).First();
var pagingSql = PagingHelper.CreatePagingSql(totalCount, pagesize, pageindex, safeSql, order);
return(con.Query <T>(pagingSql, whereParam).ToList());
}