DevExpress.LookUpEdit控件实现自动搜索定位功能 兼使用方法（looUpEdit可编辑）

DevExpress.LookUpEdit 使用方法

设置可手动输入

this.LookUpEdit1.Properties.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.Standard;

  public static void LookUpbd(DevExpress.XtraEditors.LookUpEdit look, string sql,int display,int value)
        {
            DataTable dt = DAL.SqlDbhelp.GetDataSet(sql);
            look.Properties.SearchMode = DevExpress.XtraEditors.Controls.SearchMode.AutoComplete;
            look.Properties.DataSource = dt;
            look.Properties.DisplayMember = dt.Columns[display].ColumnName; //显示在文本框上的值
            look.Properties.ValueMember = dt.Columns[value].ColumnName; //获取的值
            look.Properties.NullText = "";
            look.Properties.SortColumnIndex = 0;
            look.Properties.ImmediatePopup = true;

        }

以下内容为转载

文章来源 http://blog.sina.com.cn/s/blog_6d1c583c01011qiv.html

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

贴图图片

关于枚举类型SearchMode的定义：

C#Code: //Summary: // Enumerates search modes for a lookup edior. public enumSearchMode { // Summary: // The incremental search is enabled only when the dropdown window isopen. // If the window is closed, the user can modify the text in the editbox. However // these changes are ignored. // When the dropdown is open the incremental search is performedagainst the // column whose index is specified by theDevExpress.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 searchagainst // this column. // The following screenshot shows a sample lookup editor. Theincremental search // is performed against the second column. OnlyInPopup = 0, // // Summary: // Enables the automatic completion feature. In this mode, when thedropdown // is closed, the text in the edit box is automatically completed ifit matches // aDevExpress.XtraEditors.Repository.RepositoryItemLookUpEditBase.DisplayMember // field value of one of dropdown rows. // When the dropdown is open, the automatic completion feature isdisabled but // the editor allows you to perform an incremental search in the samemanner // as when DevExpress.XtraEditors.Controls.SearchMode.OnlyInPopup modeis active. AutoComplete = 1, // // Summary: // Enables the incremental filtering feature. When you type within theedit // box, the editor automatically opens the dropdown window anddisplays only // records whoseDevExpress.XtraEditors.Repository.RepositoryItemLookUpEditBase.DisplayMember // field value starts with the characters typed. Other records are notdisplayed. // If you enter a value that does not match any record, the dropdownwindow // will not contain any rows. // The following image shows a lookup editor when AutoFilter mode isenabled. 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：

贴图图片

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：

贴图图片

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。

贴图图片