详解DevExpress.LookUpEdit控件实现自动搜索定位功能
详解DevExpress.LookUpEdit控件实现自动搜索定位功能
首先介绍三个重要的属性：
1. LookUpEdit.Properties.ImmediatePopup 在输入框按任一可见字符键时立即弹出下拉窗体。
2. LookUpEdit.Properties.AutoSearchColumnIndex 设置自动搜索的栏位序号，下拉窗体第一个栏位为0,依此类推，此属性配合SearchMode=OnlyInPopup时有效。
3. LookUpEdit.Properties.SearchMode 自动搜索定位模式
关于枚举类型SearchMode的定义：
C# Code:
// Summary:
// Enumerates search modes for a lookup edior.
public enum SearchMode
{
// Summary:
// The incremental search is enabled only when the dropdown window is open.
// If the window is closed, the user can modify the text in the edit box. However
// these changes are ignored.
// When the dropdown is open the incremental search is performed against the
// column whose index is specified by the DevExpress.XtraEditors.Repository.RepositoryItemLookUpEdit.AutoSearchColumnIndex
// property. The header of this column contains the search icon (binoculars).
// The user can click a specific column header to perform the search against
// this column.
// The following screenshot shows a sample lookup editor. The incremental search
// is performed against the second column.
OnlyInPopup = 0,
//
// Summary:
// Enables the automatic completion feature. In this mode, when the dropdown
// is closed, the text in the edit box is automatically completed if it matches
// a DevExpress.XtraEditors.Repository.RepositoryItemLookUpEditBase.DisplayMember
// field value of one of dropdown rows.
// When the dropdown is open, the automatic completion feature is disabled but
// the editor allows you to perform an incremental search in the same manner
// as when DevExpress.XtraEditors.Controls.SearchMode.OnlyInPopup mode is active.
AutoComplete = 1,
//
// Summary:
// Enables the incremental filtering feature. When you type within the edit
// box, the editor automatically opens the dropdown window and displays only
// records whose DevExpress.XtraEditors.Repository.RepositoryItemLookUpEditBase.DisplayMember
// field value starts with the characters typed. Other records are not displayed.
// If you enter a value that does not match any record, the dropdown window
// will not contain any rows.
// The following image shows a lookup editor when AutoFilter mode is enabled.
AutoFilter = 2,
}
//来源:C/S框架网(www.csframework.com) QQ:1980854898
// Summary:
// Enumerates search modes for a lookup edior.
public enum SearchMode
{
// Summary:
// The incremental search is enabled only when the dropdown window is open.
// If the window is closed, the user can modify the text in the edit box. However
// these changes are ignored.
// When the dropdown is open the incremental search is performed against the
// column whose index is specified by the DevExpress.XtraEditors.Repository.RepositoryItemLookUpEdit.AutoSearchColumnIndex
// property. The header of this column contains the search icon (binoculars).
// The user can click a specific column header to perform the search against
// this column.
// The following screenshot shows a sample lookup editor. The incremental search
// is performed against the second column.
OnlyInPopup = 0,
//
// Summary:
// Enables the automatic completion feature. In this mode, when the dropdown
// is closed, the text in the edit box is automatically completed if it matches
// a DevExpress.XtraEditors.Repository.RepositoryItemLookUpEditBase.DisplayMember
// field value of one of dropdown rows.
// When the dropdown is open, the automatic completion feature is disabled but
// the editor allows you to perform an incremental search in the same manner
// as when DevExpress.XtraEditors.Controls.SearchMode.OnlyInPopup mode is active.
AutoComplete = 1,
//
// Summary:
// Enables the incremental filtering feature. When you type within the edit
// box, the editor automatically opens the dropdown window and displays only
// records whose DevExpress.XtraEditors.Repository.RepositoryItemLookUpEditBase.DisplayMember
// field value starts with the characters typed. Other records are not displayed.
// If you enter a value that does not match any record, the dropdown window
// will not contain any rows.
// The following image shows a lookup editor when AutoFilter mode is enabled.
AutoFilter = 2,
}
//来源:C/S框架网(www.csframework.com) QQ:1980854898
OnlyInPopup : 配合ImmediatePopup=True时使用，当用户在输入框按任一可见字符键时立即弹出下拉窗体，并跟据输入的字符从头部开始匹配AutoSearchColumnIndex属性指定栏位字段的值，第一个栏位为0.
特点：在下拉窗体能显示匹配结果（蓝底白字），但在输入框内不显示。
效果图如下：
AutoComplete: 配合ImmediatePopup=True时使用，当用户在输入框按任一可见字符键时立即弹出下拉窗体，并在输入框自动完成您想要输入的数据，同时下拉窗体自动匹配最佳记录。AutoComplete模式仅匹配DisplayMember对应字段的值。
特点：能在输入框显示匹配的数据，并且下拉窗体显示匹配的记录。
效果图如下：
AutoFilter: 配合ImmediatePopup=True时使用，当用户在输入框按任一可见字符键时立即弹出下拉窗体，并在输入框自动完成您想要输入的数据，同时下拉窗体自动过滤掉不匹配的记录。
特点：能在输入框显示匹配的数据，并过滤过不想要的记录。
扫一扫加微信
版权声明：本文为开发框架文库发布内容,转载请附上原文出处连接
NewDoc C/S框架网
