在组合框中添加一个空行 [英] add a empty row in the combobox

问题描述

我想在我的组合框中添加一个空行。我该怎么做？

这是我的代码，

Hi , I want to add a empty row to my combobox.How can I do it?
This is my code,

protected void DataPortal_Fetch(SuperRegionInfoCriteria criteria)
        {
            SqlParameter[] parms = new SqlParameter[1];
            parms[0] = new SqlParameter("@SuperRegionType_Short", criteria.Short);

            DataTable dt = DataAccess.Query("Regions", "upSuperRegionType_Select_LU", parms);
            this.RaiseListChangedEvents = false;
            this.IsReadOnly = false;
            var data = from row in dt.AsEnumerable()
                       select SuperRegionInfo.LoadDataObj(row);
            this.AddRange(data);
            this.IsReadOnly = true;
            this.RaiseListChangedEvents = true;

推荐答案

comboBox.Items.Add（）



http://msdn.microsoft.com/en-us/library/system.windows.forms.combobox（v = vs.110）.aspx [ ^ ]



http://social.msdn.microsoft.com/Forums/windows / en-US / c7a82a6a-763e-424b-84e0-496caa9cfb4d / how-add-a-item-to-combobox？forum = winforms [ ^ ]

comboBox.Items.Add()

http://msdn.microsoft.com/en-us/library/system.windows.forms.combobox(v=vs.110).aspx[^]

http://social.msdn.microsoft.com/Forums/windows/en-US/c7a82a6a-763e-424b-84e0-496caa9cfb4d/how-add-a-item-to-combobox?forum=winforms[^]

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