使用语句控制DEV下拉菜单

最新推荐文章于 2025-10-31 14:48:07 发布

转载最新推荐文章于 2025-10-31 14:48:07 发布 · 687 阅读

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#dev #c#

本文介绍了DevExpress中的LookUpEdit和ComboBoxEdit控件的基本用法。通过具体的代码示例展示了如何设置LookUpEdit的数据源、显示成员和值成员，并介绍了ComboBoxEdit的初始化过程。

1、DevExpress.XtraEditors.LookUpEdit的基本用法

public void InitLookUpEditor()
{
//
this.lookupEditFields.Properties.Columns.AddRange(new DevExpress.XtraEditors.Controls.LookUpColumnInfo[] {
new DevExpress.XtraEditors.Controls.LookUpColumnInfo("DisplayMember", "DisplayMember", 20, DevExpress.Utils.FormatType.None, "", true, DevExpress.Utils.HorzAlignment.Default, DevExpress.Data.ColumnSortOrder.None),
new DevExpress.XtraEditors.Controls.LookUpColumnInfo("ValueMember", "", 20, DevExpress.Utils.FormatType.None, "", false, DevExpress.Utils.HorzAlignment.Default, DevExpress.Data.ColumnSortOrder.None)});

DataTable dt = new DataTable();
dt.Columns.Add("ValueMember");
dt.Columns.Add("DisplayMember");
dt.Columns.Add("DataType");
dt.Columns.Add("IsExtandedField");

DataRow row = dt.NewRow();
row["DataType"] = "";
row["IsExtandedField"] = true;
row["DisplayMember"] = "";
row["ValueMember"] = "";
dt.Rows.Add(row);

this.lookupEditFields.Properties.DisplayMember = "DisplayMember";
this.lookupEditFields.Properties.ValueMember = "ValueMember";
this.lookupEditFields.Properties.DataSource = dt;

if (dt.Rows.Count > 0)
{
//自动搜索datasouse，选择与之匹配的值，没有的情况下赋值null ,value的值必须与valuemember的数据类型一致。
lookupEditFields.EditValue = Convert.ToString(dt.Rows[0]["ValueMember"]);
//this.lookupEditFields.ItemIndex = 0;
}

}

想取这行数据的DataType值：

string dataType = Convert.ToString(cboList.GetColumnValue("DataType"));

2、DevExpress.XtraEditors.ComboBoxEdit的基本用法

public void InitComboxEditou()
    {
        comboBoxOperator.Properties.Items.Clear();
        comboBoxOperator.Properties.Items.AddRange(new object[] {
                        "等于","大于","大于等于","小于","小于等于","不等于" });
        comboBoxOperator.EditValue = "等于";

    }