如何插入和使用的SQLite SQLite的更新净

Question

我有以下几点：平板设备内部

 
tblCustomer 

ID CompanyName Group  Product group GST 
-- ----------- ------- ------------- ---- 
1 The One  Exp  A    4  
2 The One  Exp  A    8  
. 
. 
20 

2）SQLite的-DB：在后端服务器

1）的SQL Server。

 

tblCustomer 

ID CompanyName Group  Product group GST 
-- ----------- ------- ------------- ---- 
1 The One  Exp  A    4  
2 The One  Exp  A    8 
. The One 
. 
20 The One 

3） 我使用Web服务从服务器获取数据，并使用下面的代码

 

The Problems: 

1). How to I update the tblCustomer in SQLite for changes below: 

Note: ID in SQL sever and Sqlite ARE not the same. 


ID CompanyName Group  Product group GST 
-- ----------- ------- ------------- ---- 
1 The One  Exp  A    6 < -- before it was 4 


2) Someone add data in SQL Server and the total record is 21 now. 

How to add this record in SQLite tbl customer? 


foreach (var client in Customers) 
{ 
InsertNewCustomer(client.Company, client.Group, client.ProductGroup, client.GST) 
} 


private void InsertNewCustomer(string Company,string Grp, string PGrp, int Gst) 
{ 


1) How to create SQL Statement for this case? 

var existingCustomer = (db2.Table<Customer>().Where(c => c.No == Company)) ??? 

if (existingCustomer != null) 
    { 

    ??-- how to handle? 


    int success = db2.Update(existingCustomer); 

    } 
    else 
    { 
     int success = db2.Insert(new Customer() 
     { 
      Name = Company, 
      Group = Grp, 
      ProductGroup = PGrp, 
      GST = Gst 

     }); 
    } 

} 

Answer 1

1）更新tblCustomer SET GST = 6，其中插入使用SQLite-Net的API记录到的SQLite Db的ID = 1; 2）您需要执行如下SQLite语句： INSERT INTO tblCustomer（CompanyName，Group，[Product group]，GST）VALUES（'Newcompany'，'EXP'，'A'，2）;

3）与1相同，但是 UPDATE tblCustomer SET CompanyName ='Newcompany'，Group ='EXP'，[Product group] ='A'，GST = 6 WHERE ID = 1;

当然，你必须更换 'Newcompany'， 'EXP'，ID = 1 ...您的实际数据