ListBox控件使用 (例子)

后台代码：

 //向右侧品牌组里添加品牌数据
    protected void btnInput_Click(object sender, EventArgs e)
    {
        scriptinfo.InnerHtml = "";
        if (lboxExist.Items.Count > 0)
        {
            int iselectcount = 0;
            for (int j = 0; j < lboxExist.Items.Count; j++)
            {
                if (lboxExist.Items[j].Selected == true)
                {
                    iselectcount++;
                }
            }
            if (iselectcount == 0)
            {
                scriptinfo.InnerHtml = "<script>alert('请选择需要右移的品牌！')</script>";
                return;
            }
            string Brandid = "";  //品牌id
            string BGroupid = ""; //品牌组id
            BGroupid = ddlNewinfo.SelectedValue;
            for (int i = 0; i < lboxExist.Items.Count; i++)
            {
                ListItem item = lboxExist.Items[i];
                if (lboxExist.Items[i].Selected == true)
                {
                    Brandid = lboxExist.SelectedValue;
                    try
                    {
                        //向品牌与品牌组关系表中添加数据--> 判断重复先
                        string strsql = "select * from BranbGroup_Relation where BGroupid = " + BGroupid + " and Brandid = " + Brandid;
                        using (DataSet MySet = DbHelperSQL.Query(strsql))
                        {
                            if (MySet.Tables[0].Rows.Count == 0)
                            {
                                lBoxNew.Items.Add(item);
                                string BGName = ddlNewinfo.SelectedItem.Text;
                                string sql = "insert into BranbGroup_Relation (BGroupid,Brandid) values (" + BGroupid + "," + Brandid + ")";
                                int iResult = DbHelperSQL.ExecuteSql(sql);
                                if (iResult == 1)
                                {
                                    lboxExist.Items[i].Selected = false;
                                    continue;
                                }
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        scriptinfo.InnerHtml = "<script>alert('" + ex.Message + "')</script>";
                        return;
                    }
                }
            }
        }
        else
        {
            scriptinfo.InnerHtml = "<script>alert('左侧品牌组中没有品牌信息！')</script>";
            return;
        }
    }

    //以品牌组的形式-->向右侧品牌组里添加品牌数据
    protected void btnGroupInput_Click(object sender, EventArgs e)
    {
        scriptinfo.InnerHtml = "";
        if (lboxExist.Items.Count > 0)
        {
            string Brandid = "";  //品牌id
            string BGnewroupid = ""; //右侧品牌组id
            BGnewroupid = ddlNewinfo.SelectedValue;
            for (int i = 0; i < lboxExist.Items.Count; i++)
            {
                ListItem item = lboxExist.Items[i];
                Brandid = item.Value;
                try
                {
                    //向品牌与品牌组关系表中添加数据--> 判断重复先
                    string strsql = "select * from BranbGroup_Relation where BGroupid = " + BGnewroupid + " and Brandid = " + Brandid;
                    using (DataSet MySet = DbHelperSQL.Query(strsql))
                    {
                        if (MySet.Tables[0].Rows.Count == 0)
                        {
                            lBoxNew.Items.Add(item);
                            string BGName = ddlNewinfo.SelectedItem.Text;
                            string sql = "insert into BranbGroup_Relation (BGroupid,Brandid) values (" + BGnewroupid + "," + Brandid + ")";
                            int iResult = DbHelperSQL.ExecuteSql(sql);
                            if (iResult == 1)
                            {
                                continue;
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    scriptinfo.InnerHtml = "<script>alert('" + ex.Message + "')</script>";
                    return;
                }

            }
        }
        else
        {
            scriptinfo.InnerHtml = "<script>alert('左侧品牌组中没有品牌信息！')</script>";
            return;
        }

    }

    //删除右侧选中品牌数据
    protected void btnDelete_Click(object sender, EventArgs e)
    {
        scriptinfo.InnerHtml = "";
        if (lBoxNew.Items.Count > 0)
        {
            int iselectcount = 0;
            for (int j = 0; j < lBoxNew.Items.Count; j++)
            {
                if (lBoxNew.Items[j].Selected == true)
                {
                    iselectcount++;
                }
            }
            if (iselectcount == 0)
            {
                scriptinfo.InnerHtml = "<script>alert('请选择需要删除的品牌！')</script>";
                return;
            }
            string strBGid = ddlNewinfo.SelectedValue;
            string Brandid = "";
            int count = lBoxNew.Items.Count;
            int index = 0;
            for (int i = 0; i < count; i++)
            {
                ListItem item = lBoxNew.Items[index];
                if (lBoxNew.Items[index].Selected == true)   //判断当前列表框中选择的列表项
                {
                    try
                    {
                        Brandid = lBoxNew.Items[index].Value;
                        string sql = "delete from BranbGroup_Relation where BGroupid = " + strBGid + " and Brandid = " + Brandid;
                        int iResult = DbHelperSQL.ExecuteSql(sql);
                        if (iResult == 1)
                        {
                            lBoxNew.Items.Remove(item);   //移除当前列表框中选择的列表项
                            index--;
                        }
                    }
                    catch (Exception ex)
                    {
                        scriptinfo.InnerHtml = "<script>alert('" + ex.Message + "')</script>";
                        return;
                    }
                }
                index++;
            }
        }
        else
        {
            //无数据
            scriptinfo.InnerHtml = "<script>alert('品牌组中没有品牌信息！')</script>";
            return;
        }
    }

    //删除右侧全部品牌数据
    protected void btnDeleteAll_Click(object sender, EventArgs e)
    {
        scriptinfo.InnerHtml = "";
        if (lBoxNew.Items.Count > 0)
        {
            string strBGid = ddlNewinfo.SelectedValue;
            string Brandid = "";
            int count = lBoxNew.Items.Count;
            int index = 0;
            for (int i = 0; i < count; i++)
            {
                ListItem item = lBoxNew.Items[index];
                try
                {
                    Brandid = lBoxNew.Items[index].Value;
                    string sql = "delete from BranbGroup_Relation where BGroupid = " + strBGid + " and Brandid = " + Brandid;
                    int iResult = DbHelperSQL.ExecuteSql(sql);
                    if (iResult == 1)
                    {
                        lBoxNew.Items.Remove(item);   //移除当前列表框中选择的列表项
                        index--;
                    }
                }
                catch (Exception ex)
                {
                    scriptinfo.InnerHtml = "<script>alert('" + ex.Message + "')</script>";
                    return;
                }
                index++;
            }
        }
        else
        {
            //无数据
            scriptinfo.InnerHtml = "<script>alert('品牌组中没有品牌信息！')</script>";
            return;
        }
    }

另外一种ListBox获取并移除选中项目的方法：

while (ListBox1.SelectedIndex != -1)
{
        ListBox1.Items.Remove(ListBox1.SelectedItem);
}