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19.3.11 PictureBox控件
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19.3.11 PictureBox控件
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><h3 style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 0cm; MARGIN-RIGHT: 0cm; FTEL: 8.15pt"><span lang="EN-US">19.3.11 PictureBox</span><span style="FONT-FAMILY: 黑体">控件</span></h3>
<p class="MsoNormal"><span lang="EN-US">PictureBox</span><span style="FONT-FAMILY: 宋体">控件用于显示图像。图像可以是</span><span lang="EN-US">BMP</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">JPEG</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">GIF</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">PNG</span><span style="FONT-FAMILY: 宋体">、元文件或图标。</span><span lang="EN-US">SizeMode</span><span style="FONT-FAMILY: 宋体">属性使用</span><span lang="EN-US">PictureBoxSizeMode</span><span style="FONT-FAMILY: 宋体">枚举确定图像在控件中的大小和位置。</span><span lang="EN-US">SizeMode</span><span style="FONT-FAMILY: 宋体">属性可以是</span><span lang="EN-US">AutoSize</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">CenterImage</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">Normal</span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US">StretchImage</span><span style="FONT-FAMILY: 宋体">。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">设置</span><span lang="EN-US">ClientSize</span><span style="FONT-FAMILY: 宋体">属性，可以改变</span><span lang="EN-US">PictureBox</span><span style="FONT-FAMILY: 宋体">的显示区域大小。要加载</span><span lang="EN-US">PictureBox</span><span style="FONT-FAMILY: 宋体">，首先创建一个基于</span><span lang="EN-US">Iamge</span><span style="FONT-FAMILY: 宋体">的对象。例如，要把</span><span lang="EN-US">JPEG</span><span style="FONT-FAMILY: 宋体">文件加载到</span><span lang="EN-US">PictureBox</span><span style="FONT-FAMILY: 宋体">中，需要编写如下代码：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">Bitmap myJpeg = new Bitmap(" mypic.jpg");</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">pictureBox1.Image = (Image) myJpeg;</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">注意需要转换回</span><span lang="EN-US">Image</span><span style="FONT-FAMILY: 宋体">类型，因为这是</span><span lang="EN-US">Image</span><span style="FONT-FAMILY: 宋体">属性所要求的。</span></p></div>
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