在3层应用程序设计中保存DataGridView更改 [英] Save DataGridView changes in 3 layer application design
问题描述
大家好。
起初让我原谅我的英语不好。
i试试清楚地传达我的问题。
我的应用程序假设连接到MS Access数据库。
第一层:包含与我的表字段相关的属性
第二层:一个函数返回请求的行作为同一个表的DataTable
第三层:从第二层获取DataTable后,将其作为同一个表的DataTable返回。
最后在Presentation层中我将DataTable放入BindingSource并分配它到DataGridView.DataSource。
好的,到目前为止我可以正确看到请求的行但是,如何保存用户在DataGridView中所做的所有更改? br $> b $ b
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1:创建一个循环来更新每一行是否正确?
2:或者我必须将所有更改发送为Da taTable to database?
主要问题:
第一个解决方案我知道我该怎么做它但是第二次我找不到任何办法,因为我不知道如何通过3层将DataTable发送到数据库。
如果我的问题是模糊的,请告诉我
hello everybody
at first let me to excuse for my bad english.
i try to convey my problem clearly.
my application suppose to connect to a MS Access database.
First layer: consist of property related to my table fields
Second layer: a function return requested rows as DataTable of same table
Third layer: after getting DataTable from second layer, return that as DataTable of same table.
Finally in Presentation layer I put DataTable in a BindingSource and assign it to DataGridView.DataSource.
Ok, I can see the requested rows correctly so far but, how can I save all changes which has made by user in DataGridView?
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1: Is it correct to create a loop to Update each row separetly?
2: Or I must send all changes as DataTable to database?
Main problem:
for the first solution I know that how should I do it but for second I can't find any way to do it because I don't know how I can send DataTable to database through 3 layer.
if my question is vague, please tell me
推荐答案
选择方法取决于您的要求。
更新多个您可以立即使用 SqlBulkCopy [ ^ ]。用演示源代码查看这篇详细的文章。
SqlBulkCopy-批量插入记录并在使用C#和VB.Net存在记录时更新现有行 [ ^ ]
如果你已经实现了这个或者你的要求不是这个,请告诉我。
希望,它有帮助:)
Selecting a approach depends on your requirement.
To update multiple rows at once you may use SqlBulkCopy[^]. check this detailed article with demo source code.
SqlBulkCopy- Bulk Insert records and Update existing rows if record exists using C# and VB.Net[^]
In case you have implementing this or if your requirement is other than this, please let me know.
Hope, it helps :)
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