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polarstars/radDropDownList.cs

Created July 20, 2018 07:01
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#Telerik 中 RadDropDownList 显示图片列表 #C#
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radDropDownList.cs
花不啰嗦，直接看代码，数据绑定到DataTable上，如果有多个控件绑定到一个DataTable上，你又不需要控件之间联动，
请添加类似“ddList.BindingContext = new BindingContext();”的代码。
我看到国内很多人的帖子都是用的DataTable的Copy方法，在某些情况下能满足要求，如果DataTable数据是要变动的Copy
大法就GameOver了，还是多用内建的方法，很多功能微软都为我们考虑好了， 是我们自己学艺不精不甚了解罢了。
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RadDropDownList ddList = new RadDropDownList();
...............(其它属性设置省略)
ddList.BindingContext = new BindingContext();
ddList.DataSource = FilesDataTable;
ddList.ListElement.AutoSizeItems = true;
ddList.DropDownSizingMode = Telerik.WinControls.UI.SizingMode.None;
ddList.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList;
ddList.ItemDataBound += (sender, e) =>
{
RadListDataItem item = e.NewItem;
item.Text = (item.DataBoundItem as DataRowView)["Name"].ToString();
item.TextImageRelation = TextImageRelation.ImageBeforeText;
item.Image = LoadImage((item.DataBoundItem as DataRowView)["Path"].ToString()).GetThumbnailImage(100, 75, null, new IntPtr());
};
public Image LoadImage(string filePath)
{
System.IO.FileStream fs = new System.IO.FileStream(filePath,System.IO.FileMode.Open, System.IO.FileAccess.Read);
Image image = System.Drawing.Image.FromStream(fs);
fs.Close();
return image;
}
其中 FilesDataTable 是一个DataTable ,其中包含2列，列名分别为 “Name”和“Path”,分别存储图片的文件名和全路径，GetThumbnailImage是C#内建的取缩略图的方法。
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