标签:c style class blog code java
今天的演示效果如下:在GridView中的下拉框中选中一种颜色,则后面的加载相应的图片,如下图:
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下面说下实现方法:首先在项目中拉一个GirdControl,在里面创建4列:ID,Name,Color,Image,并将Color和Image分别创建repositoryItemComboBox和repositoryItemPictureEdit控件,如下图:
将一个图片文件夹放到程序的启动目录中:
文件夹中包含如下图片:
接下来进行创建数据模板,先创建一个Datetable,添加数据并绑定到表格中:
private void InitData() { DataTable dt = new DataTable(); dt.Columns.Add("ID", typeof(int)); dt.Columns.Add("Name", typeof(string)); dt.Columns.Add("Color", typeof(string)); dt.Rows.Add(new object[] { 1, "Howard Snyder", "Red" }); dt.Rows.Add(new object[] { 2, "Jaime Yorres", "Blue" }); dt.Rows.Add(new object[] { 3, "Fran Wilson", "Orange" }); dt.Rows.Add(new object[] { 4, "Paula Wilson", "White" }); dt.Rows.Add(new object[] { 5, "Liz Nixon", "Red" }); dt.Rows.Add(new object[] { 6, "Liu Wong", "Yellow" }); dt.Rows.Add(new object[] { 7, "Carlos Hernánde", "Green" }); dt.Rows.Add(new object[] { 8, "Carlos González", "White" }); dt.Rows.Add(new object[] { 9, "Elizabeth Brown", "Orange" }); dt.Rows.Add(new object[] { 10, "Hari Kumar", "Yellow" }); dt.Rows.Add(new object[] { 11, "Michael Holz", "Yellow" }); gridControl1.DataSource = dt; }
然后创建两个全局变量用来存放图片路径和图像数据:
string imageDir = @"Images\"; Hashtable images = new Hashtable(); public string GetFileName(string color) { if (string.IsNullOrEmpty(color)) return string.Empty; return color + ".jpg"; }
最后在Gridview中为其注册一个CustomUnboundColumnData事件,在事件中将color列和image列手动绑定并显示:
private void gridView1_CustomUnboundColumnData(object sender, DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs e) { if (e.Column.FieldName == "Image" && e.IsGetData) { GridView view = sender as GridView; string colorName = (string)((DataRowView)e.Row)["Color"]; string fileName = GetFileName(colorName).ToLower(); if (!images.ContainsKey(fileName)) { Image img = null; try { string filePath = DevExpress.Utils.FilesHelper.FindingFileName(Application.StartupPath, imageDir + fileName, false); img = Image.FromFile(filePath); } catch (Exception) { throw; } images.Add(fileName, img); } e.Value = images[fileName]; } }
到此为止,一个GridView就做好了:
浅谈DevExpress<三>:在GridView中加载动态图片,布布扣,bubuko.com
浅谈DevExpress<三>:在GridView中加载动态图片
标签:c style class blog code java
原文地址:http://www.cnblogs.com/xuekai-to-sharp/p/3765480.html