C# 在datagridview上搜索和筛选

我正在使用下面的函数加载gridview以形成表单

private DataClasses1DataContext db_cooperations = new DataClasses1DataContext();
private int numberOfObjectsPerPage = 20;
private int CurrentPageIndex = 1;

Func<IEnumerable<cooperations>, IEnumerable<cooperations>> ordering = t => t.OrderBy(i => i.name);

private void daftarKoperasi_Load(object sender, EventArgs e)
{
    GetData(CurrentPageIndex);
    dataGridProperty();
}

 private void GetData(int page)
{
    page = page - 1;
    db_cooperations.Log = Console.Out;  

    var query = (from c in ordering(db_cooperations.cooperations)
                select new { c.id, c.name, c.phone, c.email, c.city })
                .Skip(numberOfObjectsPerPage * page).Take(numberOfObjectsPerPage).ToList();


    dataGridView1.DataSource = query ;
}

---

但它仍然不起作用

在linq语句中添加where子句

顺便说一句：所有的排序、过滤和投影都是在内存中完成的。在应用任何记录集之前，您正在将整个记录集加载到内存中，因为您使用的是

IEnumerable

，而不是

IQueryable

以便根据

name

过滤（搜索）数据，同时在Linq to Sql中过滤

city

您使用了

SQL的
或
，它们在C中表示为
|
或
|
，并表示为
类似于
SQL的
。下面是一个关于使用
.Contains

PS：也许我会错过你的问题，但你这样做

.where(c => c.name.ToLower().Contains(searchTxt.Text.ToLower()) && 
                                c => c.city == cityCB.Text)

编辑：

从您的更新中

   if (String.IsNullOrEmpty(searchTxt.Text) == false)
    {
      query = query.Where(c => c.name.ToLower().Contains(searchTxt.Text.ToLower())).ToList();
    }

    if (cityCB.SelectedIndex > -1)
    {
       query =  query.Where(c => c.city.ToLower().Equals(cityCB.Text.ToLower())).ToList();
    }

因此，我将按照下面的代码解决这个问题

var query = (from c in ordering(db_cooperations.cooperations)
                         select new { c.id, c.name, c.phone, c.email, c.city })
                         .Skip(numberOfObjectsPerPage * page).Take(numberOfObjectsPerPage);

if (String.IsNullOrEmpty(searchTxt.Text) == false && searchTxt.Text.Trim() != "Search....")
    {
        query = from c in query
        where c.name.ToLower().Contains(searchTxt.Text.ToLower())
        select new { c.id, c.name, c.phone, c.email, c.city })
    }

if (kotaCB.SelectedIndex > -1)
    {
        query = from c in query
                where c.kota.ToLower().Equals(kotaCB.Text.ToLower())
                select new { c.id, c.name, c.phone, c.email, c.city });
        }

dataGridView1.DataSource = query.ToList();

感谢大家帮助我@spajce，@Jason
订购我可以使用这个：
ordering=t=>t.OrderBy（I=>I.nama）。然后对于搜索，我尝试这样做：
ordering=t=>t.Where（I=>I.name.Contains（searchTxt.Text））。但事实并非如此work@l1th1um，我更新了我的回答，但是。。你试过我的第一个答案了吗？
.where(c => c.name.ToLower().Contains(searchTxt.Text.ToLower()) && 
                                c => c.city == cityCB.Text)

   if (String.IsNullOrEmpty(searchTxt.Text) == false)
    {
      query = query.Where(c => c.name.ToLower().Contains(searchTxt.Text.ToLower())).ToList();
    }

    if (cityCB.SelectedIndex > -1)
    {
       query =  query.Where(c => c.city.ToLower().Equals(cityCB.Text.ToLower())).ToList();
    }

var query = (from c in ordering(db_cooperations.cooperations)
                         select new { c.id, c.name, c.phone, c.email, c.city })
                         .Skip(numberOfObjectsPerPage * page).Take(numberOfObjectsPerPage);

if (String.IsNullOrEmpty(searchTxt.Text) == false && searchTxt.Text.Trim() != "Search....")
    {
        query = from c in query
        where c.name.ToLower().Contains(searchTxt.Text.ToLower())
        select new { c.id, c.name, c.phone, c.email, c.city })
    }

if (kotaCB.SelectedIndex > -1)
    {
        query = from c in query
                where c.kota.ToLower().Equals(kotaCB.Text.ToLower())
                select new { c.id, c.name, c.phone, c.email, c.city });
        }

dataGridView1.DataSource = query.ToList();