获取下一个先前的记录 [英] getting next previous records

问题描述

嗨 我在获取C#.net Windows应用程序中的下一个，上一个记录时遇到问题

描述:

我已经将数据绑定到datagridview，并且当我单击datagridview中间单元时，垂直的
行数据作为详细信息进入下一个表格.我要从中间的行数据导航数据
通过计算下一个按钮并减少上一个按钮的数量，但即时消息却从头开始.s o请发送解决方案至我的emailid [已删除电子邮件]

解决方案

你好

假设存在MyObject的List，并且您已经将MyObjectCollection绑定到DataGrid

列表< mytype> MyObjectCollection 

选择对象时，您需要Next和Previous:

 公共 MyType GetNextItem(对象 selectedObject，列表< MyType> myObjectCollection)
{
     int  c = myObjectCollection.TakeWhile(o = >  o == selectedObject).Count()- 1 ;

     int  p = c- 1 ;
     int  n = c +  1 ;

    返回(myObjectCollection.Count()>  = n +  1 )? myObjectCollection [n]:空;
}

公共 MyType GetPreviousItem(对象 selectedObject，列表< MyType> myObjectCollection)
{
     int  c = myObjectCollection.TakeWhile(o = >  o == selectedObject).Count()- 1 ;

     int  p = c- 1 ;
     int  n = c +  1 ;

    返回(p >  =  0 ) ? myObjectCollection [p]:空;
} 

hi i have problem on getting next,previous records in C#.net windows application

descreption:

i have binded data to datagridview and when i click datagridview middle cell the perticular
row data goes to next form as details .i want navigate data from that middle row data
by counting for next button and decrement for previous button but im getting from begining.so please send solution to my emailid [email removed]

解决方案

Hello

Suppose, there is a List of MyObject, and you''ve bound MyObjectCollection to the DataGrid

List<mytype> MyObjectCollection

When you select a object then you want the Next and the Previous:

public MyType GetNextItem(object selectedObject, List<MyType> myObjectCollection)
{
    int c = myObjectCollection.TakeWhile(o => o == selectedObject).Count() - 1;

    int p = c - 1;
    int n = c + 1;

    return (myObjectCollection.Count() >= n + 1) ? myObjectCollection[n] : null;
}

public MyType GetPreviousItem(object selectedObject, List<MyType> myObjectCollection)
{
    int c = myObjectCollection.TakeWhile(o => o == selectedObject).Count() - 1;

    int p = c - 1;
    int n = c + 1;

    return (p >= 0) ? myObjectCollection[p] : null;
}

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