Question

SessionIDs ids = (SessionIDs)Session["IDs"];
BSDataContext ct = new BSDataContext();

var customers = from cust in ct.tblCustomers
                where cust.AccountID == ids.accountID && drpFilter.SelectedValue.StartsWith(txtSearch.Text.ToString())
                join mem in ct.tblCustomerMemberships on cust.CustomerID equals mem.CustomerID
                select new { cust.CustomerID, cust.Mobile, cust.BusinessPhone, cust.Code, cust.Email, cust.HomePhone, mem.Membership, Name = cust.FirstName + cust.LastName };
grdCustomer.DataSource = customers;
grdCustomer.DataBind();

我的记录以Waqar开头，但没有显示。

drpFilter.SelectedValue = cust.Name and txtSearch.Text = Waqar

请帮助我

Answer 1

我可以看到一个问题：

 SessionIDs ids = (SessionIDs)Session["IDs"];
            BSDataContext ct = new BSDataContext();
            var customers = from cust in ct.tblCustomers
                            where cust.AccountID == ids.accountID &&
  drpFilter.SelectedValue.StartsWith(txtSearch.Text.ToString()) //<-- HERE
                                join mem in ct.tblCustomerMemberships
                                on cust.CustomerID equals mem.CustomerID
                                select new { ... };

如果执行此操作：drpFilter.SelectedValue.StartsWith(txtSearch.Text.ToString())它只会给你一个布尔值因此，生成的SQL看起来像这样：

WHERE AccountID = @p1 AND TRUE

LINQtoSQL搜索机制

1 个答案: