自定义FileNameEditor
自定义FileNameEditor
提问于 2012-10-20 23:08:22
我想实现一个自定义的FileNameEditor；我想设置我自己的过滤器，并且我想能够选择多个文件。
public class Settings
{
[EditorAttribute(typeof(FileNamesEditor), typeof(System.Drawing.Design.UITypeEditor))]
public string FileNames { get; set; }
}
public class FileNamesEditor : FileNameEditor
{
protected override void InitializeDialog(OpenFileDialog openFileDialog)
{
openFileDialog.Multiselect = true;
openFileDialog.Filter = "Word|*.docx|All|*.*";
base.InitializeDialog(openFileDialog);
}
}这会忽略filter属性，尽管我可以选择多个文件，但不能将它们分配给我的Settings.FileNames属性，因为Settings.FileNames是string[]类型，而派生类的结果是string。我如何告诉我的派生类返回openFileDialog的FileNames，以及如何使过滤器工作？我遗漏了什么？
回答 3
Stack Overflow用户
发布于 2013-09-25 16:24:08
原来的代码对我来说是有效的，除了需要重新排序。您需要在更改之前调用base.Initialize，否则它们会被覆盖(调试会很好地显示出来)
public class FileNamesEditor : FileNameEditor
{
protected override void InitializeDialog(OpenFileDialog openFileDialog)
{
base.InitializeDialog(openFileDialog);
openFileDialog.Multiselect = true;
openFileDialog.Filter = "Word|*.docx|All|*.*";
}
}Stack Overflow用户
发布于 2012-10-20 23:59:15
也许可以为string[]使用ArrayEditor
public class Settings
{
[EditorAttribute(typeof(System.ComponentModel.Design.ArrayEditor), typeof(System.Drawing.Design.UITypeEditor))]
public string[] FileNames { get ; set; }
}Stack Overflow用户
发布于 2012-10-21 08:16:40
好的，它是这样工作的.
public class FileNamesEditor : UITypeEditor
{
private OpenFileDialog ofd;
public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
{
return UITypeEditorEditStyle.Modal;
}
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if ((context != null) && (provider != null))
{
IWindowsFormsEditorService editorService =
(IWindowsFormsEditorService)
provider.GetService(typeof(IWindowsFormsEditorService));
if (editorService != null)
{
ofd = new OpenFileDialog();
ofd.Multiselect = true;
ofd.Filter = "Word|*.docx|All|*.*";
ofd.FileName = "";
if (ofd.ShowDialog() == DialogResult.OK)
{
return ofd.FileNames;
}
}
}
return base.EditValue(context, provider, value);
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12989745
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