小编lor*_*ron的帖子

使用MVVM -pattern将DataContext设置为特定的ViewModel.现在有没有办法告诉XAML DataContext的类型,以便它将验证我的绑定？

在ASP.NET MVC中寻找类似于viewdata的东西.

var sql = @"SELECT
    a.id AS `Id`, 
    a.thing AS `Name`, 
    b.id AS `CategoryId`,
    b.something AS `CategoryName`  
FROM ..";

var products = connection.Query<Product, Category, Product>(sql,
    (product, category) =>
    {
        product.Category = category;
        return product;
    }, 
    splitOn: "CategoryId");

foreach(var p in products)
{
    System.Diagnostics.Debug.WriteLine("{0} (#{1}) in {2} (#{3})", p.Name, p.Id, p.Category.Name, p.Category.Id);
}

结果是:

'First (#1) in  (#0)'
'Second (#2) in  (#0)'

CategoryId和CategoryName具有以下值

var products = connection.Query(sql).Select<dynamic, Product>(x => new Product
{
    Id = x.Id,
    Name = x.Name,
    Category = new Category …

是否可以将拖动源限制为仅在拖动时在圆形路径的边界内移动？

我尝试了以下内容,但它只是说"此时此刻意外."

@echo off
:enter-input
echo Please enter a number between 1 and 15:
echo 1 = Selection one
echo 2 = Selection two
echo 4 = Selection three
echo 8 = Selection four
echo x = Quit

set INPUT=
set /P INPUT=Type number: %=%

if "%INPUT%" == "" goto enter-input
if "%INPUT%" == "x" goto end
if "%INPUT%" == "X" goto end

set /A %INPUT%
if %INPUT% & 1 == 1 echo Selection one
if %INPUT% & 2 == 2 …