Linq加入多个条件？

Question

在linq我试图这样做

select * from tbl1 join tbl2 on tbl1.column1= tbl2.column1 and tbl1.column2 = tbl2.column2

我如何在Linq中编写上述查询....我试过这样但是给出了错误

  var sasi = from table1 in dtFetch.AsEnumerable()
             join table2 in dssap.AsEnumerable() 
             on new { 
                table1.Field<string >["SAPQuotationNo"],
                table1.Field<string >["Invoiceno"]} 
             equals new {  
                table2.Field<string>["SAPQuotationNo"],
                table2.Field <string>["Invoiceno"]
             }

Answer 1

• 使用匿名类型
• 给出属性名称
• 选择一些东西
• 使用DataRow.Field作为方法与圆括弧

var sasi = from table1 in dtFetch.AsEnumerable()
           join table2 in dssap.AsEnumerable() 
           on new 
           { 
               SAPQuotationNo = table1.Field<string>("SAPQuotationN"),
               Invoiceno = table1.Field<string>("Invoiceno")
           } equals new 
           {
               SAPQuotationNo = table2.Field<string>("SAPQuotationNo"),
               Invoiceno = table2.Field<string>("Invoiceno") 
           }
           select table1;