blocks|key|2657050|text|var+columns+=+new+[]{new+ColumnDefinition(),+new+ColumnDefinition()};|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2657051|按照预期工作。|unstyled|2657052|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var columns = new []{new ColumnDefinition(), new ColumnDefinition()};
</code></pre>

Works as expected.

blocks|key|2373151|text|你可以应用一些LINQ：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2373152|var+columns+=+Enumerable.Repeat(new+ColumnDefinition(),+10).ToArray();|code-block|syntax|javascript|2373153|调整传递给Repeat的数组大小的计数。然而，这将导致在数组的每个元素中保存相同的对象。因此，可能需要重复创建：|offset|length|style|CODE|2373154|var+columns+=+Enumerable.Repeat(0,+10).Select(i+=>+new+ColumnDefinition()).ToArray();|2373155|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/bb348899.aspx^0|0|0|5|6|5|6|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@$I|11|J|12|1|13]]|A|$]]|$1|M|3|N|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

You can apply a little LINQ:

<pre><code>var columns = Enumerable.Repeat(new ColumnDefinition(), 10).ToArray();
</code></pre>

Adjust the count passed to <a href="http://msdn.microsoft.com/en-us/library/bb348899.aspx" rel="nofollow"><code>Repeat</code></a> for the size of array. However this will lead to the same object being saved in each element of the array. So maybe the creation needs to be repeated:

<pre><code>var columns = Enumerable.Repeat(0, 10).Select(i =&gt; new ColumnDefinition()).ToArray();
</code></pre>

blocks|key|2657111|text|据我所知，任何使用简单for循环的解决方案都会有糟糕的性能，而且for循环只会占用3行代码。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2657112|var+columns+=+new+ColumnDefinition[2];
for+(int+i+=+0;+i+<=+columns.Count();+i%2B%2B)+{
++++columns[i]+=+new+ColumnDefinition();
}

//+This+is+also+a+shorthand+which+compiles+to+above+but+only+valid+for+types+with
//+default+contructor+as+above+(i.e.+string[]+array+cannot+be+initialized+with+this)
columns.Initialize();|code-block|syntax|javascript|2657113|entityMap^0|B|3|W|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

As far as I know, any solution using anything other than a simple <code>for</code> loop for this will have a horrible performance and a <code>for</code> loop would only take 3 lines anyway.

<pre><code>var columns = new ColumnDefinition[2];
for (int i = 0; i &lt;= columns.Count(); i++) {
 columns[i] = new ColumnDefinition();
}

// This is also a shorthand which compiles to above but only valid for types with
// default contructor as above (i.e. string[] array cannot be initialized with this)
columns.Initialize();
</code></pre>

blocks|key|754678|text|通过调用值类型的默认构造函数，可以使用Array.Initialize+Method初始化值类型数组的每个元素。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|754679|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.array.initialize.aspx^0|J|N|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can use <a href="http://msdn.microsoft.com/en-us/library/system.array.initialize.aspx" rel="nofollow">Array.Initialize Method</a>
Initializes every element of the value-type Array by calling the default constructor of the value type.

Consider the following case:

<pre><code>ColumnDefinition[] columns = new ColumnDefinition[2];
columns[0] = new ColumnDefinition();
columns[1] = new ColumnDefinition();
</code></pre>

After instantiating columns as an array of ColumnDefinition, I needed to explicitly instantiate each array element. Of course, it could have been done using loops, but I was wondering if there was something simpler which would instantiate every element at once after instantiating the Array type itself.

Instantiating Array and Instantiating each Member at once

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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考虑以下情况：ColumnDefinition[] columns = new ColumnDefinition[2];columns[0] = new ColumnDefinition();columns[1] = new ColumnDefinition();在将列作为ColumnDefinition数组实例化后，...

问实例化数组，一次实例化每个成员
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