C# DataDomainService上的SUM和GROUPBY lambda表达式
我有一个Silverlight应用程序和一个来自domaindatasource控件的gridview绑定,我正在使用两个参数从域数据源查询一个视图,但是从结果来看,我需要对4列求和,按其他列分组 我的元数据类:C# DataDomainService上的SUM和GROUPBY lambda表达式,c#,sql,lambda,edmx,domaindatasource,C#,Sql,Lambda,Edmx,Domaindatasource,我有一个Silverlight应用程序和一个来自domaindatasource控件的gridview绑定,我正在使用两个参数从域数据源查询一个视图,但是从结果来看,我需要对4列求和,按其他列分组 我的元数据类: internal sealed class vwAplicacoesMetadata { // Metadata classes are not meant to be instantiated. private vwAplicacoesMet
internal sealed class vwAplicacoesMetadata
{
// Metadata classes are not meant to be instantiated.
private vwAplicacoesMetadata()
{
}
public Nullable<int> CodInternoCliente { get; set; }
public Nullable<int> CodTipoOper { get; set; }
public string CPFCNPJCliente { get { return this.CPFCNPJCliente; } set { String.Format("{0,-14}", value); } }
public string TipoClientePFPJ { get; set; }
public string NomeCliente { get; set; }
public DateTime DataOper { get; set; }
public decimal LCQtde { get; set; }
public decimal LCValor { get; set; }
public decimal LDQtde { get; set; }
public decimal LDValor { get; set; }
}
}
内部密封类vwAplicacoesMetadata
{
//元数据类并不意味着要实例化。
私有vwAplicacoesMetadata()
{
}
公共可空的codinternoclient{get;set;}
公共可空的codtipoper{get;set;}
公共字符串cpfcnpjclient{get{返回this.cpfcnpjclient;}set{string.Format(“{0,-14}”,value);}
公共字符串TipoClientePFPJ{get;set;}
公共字符串NomeCliente{get;set;}
公共日期时间数据操作符{get;set;}
公共十进制LCQtde{get;set;}
公共十进制值{get;set;}
公共十进制LDQtde{get;set;}
公共十进制LDValor{get;set;}
}
}
IQueryable函数我需要使用groupby和sum表达式:
public IQueryable<vwAplicacoes> GetVwAplicacoesPorData(DateTime pstrDataInicio, DateTime pstrDataFinal)
{
return this.ObjectContext.vwAplicacoes.Where(d => d.DataOper > pstrDataInicio && d.DataOper < pstrDataFinal)
}
public IQueryable GetVwAplicacoesPorData(DateTime pstrDataInicio,DateTime pstrDataFinal)
{
返回此.ObjectContext.vwAplicacoes.Where(d=>d.DataOper>pstrDataInicio&&d.DataOper
现在我需要按CPFCNPJCliente、NomeCliente、TipoClientePFPJ、CodInternoCliente和CodTipoOper对字段LCValor、LCQtde、LDValor和LDQtde进行分组
有什么建议吗?试试这个:
return this.ObjectContext.vwAplicacoes
.Where(d => d.DataOper > pstrDataInicio && d.DataOper < pstrDataFinal)
.GroupBy(x => new {x.CPFCNPJCliente,x.NomeCliente,x.TipoClientePFPJ,x.CodInternoCliente,x.CodTipoOper})
.Select(k => new {key = k.Key,
totalLCValor = k.Sum(x=>x.LCValor),
totalLCQtde = k.Sum(x=>x.LCQtde),
totalLDValor = k.Sum(x=>x.LDValor),
totalLDQtde = k.Sum(x=>x.LDQtde)})
返回this.ObjectContext.vwAplicacoes
.Where(d=>d.DataOper>pstrDataInicio&&d.DataOpernew{x.cpfcnpjclient,x.NomeCliente,x.tipoclientefpj,x.codinternoclient,x.CodTipoOper})
.Select(k=>new{key=k.key,
TotalCvalor=k.Sum(x=>x.LCValor),
TotalCqtde=k.Sum(x=>x.LCQtde),
TotaldValor=k.Sum(x=>x.LDValor),
totaldqtde=k.Sum(x=>x.LDQtde)})