C# ListView.EnsureVisible方法代码示例

        //添加单行数据
        public void AddListViewData(ListView list, Dictionary<string, string> data)
        {
            if (list.InvokeRequired)//不能访问就创建委托
            {
                ListViewDelegate d = new ListViewDelegate(AddListViewData);
                list.Invoke(d, new object[] { list, data });
            }
            else
            {
                list.BeginUpdate();
                ListViewItem list_item = new ListViewItem();
                bool need_init = true;
                foreach (KeyValuePair<string, string> cell in data)
                {
                    ListViewItem.ListViewSubItem list_sub_item = new ListViewItem.ListViewSubItem();
                    if (need_init)
                    {
                        list_item.Text = cell.Value;
                        need_init = false;
                    }
                    else
                    {
                        list_sub_item.Text = cell.Value;
                        list_item.SubItems.Add(list_sub_item);
                    }
                }
                list.Items.Add(list_item);
                list.EnsureVisible(list.Items.Count - 1);
                list.EndUpdate();

            }
        }

 void doSort(ListView lv)
 {
     lv.Sort();
     if (lv.Items.Count > 0)
         lv.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent);
     if (lv.SelectedItems.Count > 0)
         lv.EnsureVisible(lv.SelectedIndices[0]);
 }

 public void ListViewBuilder(ListView listView, Color? color = null, int columnFullWidth = 99, params string[] value)
 {
     listView.Items.Add(new ListViewItem(value));
     if (color != null)
     {
         listView.Items[listView.Items.Count - 1].ForeColor = (Color)color;
     }
     listView.EnsureVisible(listView.Items.Count - 1);
     ListViewResizeColumn(listView, columnFullWidth);
 }

 public static void SelectListItem(ListView lst, int index)
 {
     if (lst.Items.Count > 0)
       {
     foreach (ListViewItem v in lst.Items)
     {
       if (v.Index == index)
       {
     v.Focused = true;
     v.Selected = true;
     lst.EnsureVisible(index);
     break;
       }
     }
       }
 }

        private void doEnsureVisible(ListView listView, ListViewItem item)
        {
            int index = listView.Items.IndexOf(item);

            if (index < 0) return;

            if (listView.Items.Count > index + 2)
                listView.EnsureVisible(index + 2);
            else if (listView.Items.Count > index + 1)
                listView.EnsureVisible(index + 1);
            else
                listView.EnsureVisible(index);
        }

        private static bool FindFirstInProductList(ListView list, ProductSearchSettings settings)
        {
            foreach (ListViewItem lvi in list.Items) lvi.Selected = false;

            if (settings.SearchStartingRow >= list.Items.Count)
                return false;

            for (int i = settings.SearchStartingRow; i < list.Items.Count; i++)
            {
                ListViewItem lvi = list.Items[i];
                if (FindInItem(lvi, settings))
                {
                    lvi.Selected = true;
                    settings.SearchStartingRow = i + 1;
                    list.EnsureVisible(i);
                    return true;
                }
            }
            return false;
        }

        private static void SynchronizeCursor(ListView first, ListView second)
        {
            if (first.SelectedIndices.Count > 0)
            {
                int index = first.SelectedIndices[0];

                if (index < second.Items.Count)
                {
                    second.SelectedIndices.Add(index);
                    second.EnsureVisible(index);
                }
            }
        }

        // 根据册条码号或者记录路径，装入册记录
        // parameters:
        //      strBarcodeOrRecPath 册条码号或者记录路径。如果内容前缀为"@path:"则表示为路径
        //      strMatchLocation    附加的馆藏地点匹配条件。如果==null，表示没有这个附加条件(注意，""和null含义不同，""表示确实要匹配这个值)
        // return: 
        //      -2  册条码号或者记录路径已经在list中存在了(行没有加入listview中)
        //      -1  出错(注意表示出错的行已经加入listview中了)
        //      0   因为馆藏地点不匹配，没有加入list中
        //      1   成功
        int LoadOneItem(
            string strPubType,
            string strBarcodeOrRecPath,
            RecordInfo info,
            ListView list,
            string strMatchLocation,
            out string strOutputItemRecPath,
            ref ListViewItem item,
            out string strError)
        {
            strError = "";
            strOutputItemRecPath = "";
            long lRet = 0;

            // 判断是否有 @path: 前缀，便于后面分支处理
            bool bIsRecPath = StringUtil.HasHead(strBarcodeOrRecPath, "@path:");

            string strItemText = "";
            string strBiblioText = "";

            // string strItemRecPath = "";
            string strBiblioRecPath = "";
            XmlDocument item_dom = null;
            string strBiblioSummary = "";
            string strISBnISSN = "";

            if (info == null)
            {
                byte[] item_timestamp = null;

            REDO_GETITEMINFO:
                lRet = Channel.GetItemInfo(
                    stop,
                    strBarcodeOrRecPath,
                    "xml",
                    out strItemText,
                    out strOutputItemRecPath,
                    out item_timestamp,
                    "recpath",
                    out strBiblioText,
                    out strBiblioRecPath,
                    out strError);
                if (lRet == -1)
                {
                    DialogResult temp_result = MessageBox.Show(this,
    strError + "\r\n\r\n是否重试?",
    "AccountBookForm",
    MessageBoxButtons.RetryCancel,
    MessageBoxIcon.Question,
    MessageBoxDefaultButton.Button1);
                    if (temp_result == DialogResult.Retry)
                        goto REDO_GETITEMINFO;
                }
                if (lRet == -1 || lRet == 0)
                {
#if NO
                    if (item == null)
                    {
                        item = new ListViewItem(strBarcodeOrRecPath, 0);
                        list.Items.Add(item);
                    }
                    else
                    {
                        Debug.Assert(item.ListView == list, "");
                    }

                    // item.SubItems.Add(strError);
                    ListViewUtil.ChangeItemText(item, COLUMN_ERRORINFO, strError);

                    SetItemColor(item, TYPE_ERROR);

                    // 将新加入的事项滚入视野
                    list.EnsureVisible(list.Items.IndexOf(item));
#endif
                    SetError(list,
                        ref item,
                        strBarcodeOrRecPath,
                        strError);
                    goto ERROR1;
                }

                SummaryInfo summary = (SummaryInfo)this.m_summaryTable[strBiblioRecPath];
                if (summary != null)
                {
                    strBiblioSummary = summary.Summary;
                    strISBnISSN = summary.ISBnISSn;
                }

                if (strBiblioSummary == ""
                    && this.checkBox_load_fillBiblioSummary.Checked == true)
                {
//.........这里部分代码省略.........

        internal override void SetError(ListView list,
    ref ListViewItem item,
    string strBarcodeOrRecPath,
    string strError)
        {
            // 确保线程安全 2014/9/3
            if (list != null && list.InvokeRequired)
            {
                Delegate_SetError d = new Delegate_SetError(SetError);
                object[] args = new object[4];
                args[0] = list;
                args[1] = item;
                args[2] = strBarcodeOrRecPath;
                args[3] = strError;
                this.Invoke(d, args);

                // 取出 ref 参数值
                item = (ListViewItem)args[1];
                return;
            }

            if (item == null)
            {
                item = new ListViewItem(strBarcodeOrRecPath, 0);
                list.Items.Add(item);
            }
            else
            {
                Debug.Assert(item.ListView == list, "");
            }

            // item.SubItems.Add(strError);
            ListViewUtil.ChangeItemText(item, COLUMN_ERRORINFO, strError);

            SetItemColor(item, TYPE_ERROR);

            // 将新加入的事项滚入视野
            list.EnsureVisible(list.Items.IndexOf(item));
        }

        // 根据册条码号或者记录路径，装入册记录
        // parameters:
        //      strBarcodeOrRecPath 册条码号或者记录路径。如果内容前缀为"@path:"则表示为路径
        //      strMatchLocation    附加的馆藏地点匹配条件。如果==null，表示没有这个附加条件(注意，""和null含义不同，""表示确实要匹配这个值)
        // return: 
        //      -2  册条码号已经在list中存在了(行没有加入listview中)
        //      -1  出错(注意表示出错的行已经加入listview中了)
        //      0   因为馆藏地点不匹配，没有加入list中
        //      1   成功
        public int LoadOneItem(
            string strBarcodeOrRecPath,
            ListView list,
            string strMatchLocation,
            out string strError)
        {
            strError = "";

            // 判断是否有 @path: 前缀，便于后面分支处理
            bool bIsRecPath = StringUtil.HasHead(strBarcodeOrRecPath, "@path:"); ;

            string strItemXml = "";
            string strBiblioText = "";

            string strItemRecPath = "";
            string strBiblioRecPath = "";

            byte[] item_timestamp = null;

            long lRet = Channel.GetItemInfo(
                stop,
                strBarcodeOrRecPath,
                "xml",
                out strItemXml,
                out strItemRecPath,
                out item_timestamp,
                "recpath",
                out strBiblioText,
                out strBiblioRecPath,
                out strError);
            if (lRet == -1 || lRet == 0)
            {
                ListViewItem item = null;

                if (bIsRecPath == false)
                    item = new ListViewItem(strBarcodeOrRecPath, 0);
                else
                    item = new ListViewItem("", 0); // 暂时还没有办法知道条码

                // 2009/10/29
                OriginItemData data = new OriginItemData();
                item.Tag = data;
                data.Timestamp = item_timestamp;
                data.Xml = strItemXml;

                ListViewUtil.ChangeItemText(item,
                    COLUMN_ERRORINFO,
                    strError);
                // item.SubItems.Add(strError);

                SetItemColor(item, TYPE_ERROR);
                list.Items.Add(item);

                // 将新加入的事项滚入视野
                list.EnsureVisible(list.Items.Count - 1);

                goto ERROR1;
            }

            string strBiblioSummary = "";
            string strISBnISSN = "";
            string strTargetRecPath = "";

            // 看看册条码号是否有重复?
            // 顺便获得同种的事项
            for (int i = 0; i < list.Items.Count; i++)
            {
                ListViewItem curitem = list.Items[i];

                if (bIsRecPath == false)
                {
                    if (strBarcodeOrRecPath == curitem.Text)
                    {
                        strError = "册条码号 " + strBarcodeOrRecPath + " 发生重复";
                        return -2;
                    }
                }
                else
                {
                    if (strBarcodeOrRecPath == ListViewUtil.GetItemText(curitem, COLUMN_RECPATH))
                    {
                        strError = "记录路径 " + strBarcodeOrRecPath + " 发生重复";
                        return -2;
                    }
                }

                if (strBiblioSummary == "" && curitem.ImageIndex != TYPE_ERROR)
                {
                    if (curitem.SubItems[COLUMN_BIBLIORECPATH].Text == strBiblioRecPath)
                    {
                        strBiblioSummary = ListViewUtil.GetItemText(curitem, COLUMN_SUMMARY);
//.........这里部分代码省略.........

//.........这里部分代码省略.........

                strBarcodeOrRecPath = "@path:" + info.Record.Path;
                bIsRecPath = true;

                if (info.Record.RecordBody.Result.ErrorCode != ErrorCodeValue.NoError)
                {
                    SetError(list,
    ref item,
    strBarcodeOrRecPath,
    info.Record.RecordBody.Result.ErrorString);
                    goto ERROR1;
                }

                strItemText = info.Record.RecordBody.Xml;
                strOutputItemRecPath = info.Record.Path;
                // 2013/4/3
                if (info.Record.RecordBody != null)
                    item_timestamp = info.Record.RecordBody.Timestamp;
                //
                item_dom = info.Dom;
                strBiblioRecPath = info.BiblioRecPath;
                if (info.SummaryInfo != null)
                {
#if NO
                    strBiblioSummary = info.SummaryInfo.Summary;
                    strISBnISSN = info.SummaryInfo.ISBnISSn;
#endif
                    summary = info.SummaryInfo;
                }
            }


            // 附加的馆藏地点匹配
            if (strMatchLocation != null)
            {
                // TODO: #reservation, 情况如何处理?
                string strLocation = DomUtil.GetElementText(item_dom.DocumentElement,
                    "location");

                // 2013/3/26
                if (strLocation == null)
                    strLocation = "";

                if (strMatchLocation != strLocation)
                    return 0;
            }

            if (item == null)
            {
                item = AddToListView(list,
                    item_dom,
                    item_timestamp,
                    strOutputItemRecPath,
                    strBiblioRecPath,
#if NO
                    strBiblioSummary,
                    strISBnISSN,
#endif
                    summary_col_names,
                    summary);


                // 将新加入的事项滚入视野
                list.EnsureVisible(list.Items.Count - 1);

#if NO
                // 填充需要从订购库获得的栏目信息
                if (this.checkBox_load_fillOrderInfo.Checked == true)
                    FillOrderColumns(item, strPubType);
#endif
            }
            else
            {
                SetListViewItemText(item_dom,
                    item_timestamp,
                    true,
                    strOutputItemRecPath,
                    strBiblioRecPath,
#if NO
    strBiblioSummary,
    strISBnISSN,
#endif
                    summary_col_names,
                    summary,
                    item);
            }

            int nRet = VerifyItem(
                strPubType,
                strBarcodeOrRecPath,
                item,
                item_dom,
                out strError);
            if (nRet == -1)
                goto ERROR1;

            return 1;
        ERROR1:
            return -1;
        }

        public void DownloadSpoiler(XmlDocument xSet, XmlDocument xSetLang, ListView list, ProgressBar progressBar)
        {
            mList = list;

              ListViewItem item;

              if(Directory.Exists("cards"))
            Directory.Delete("cards", true);
              Directory.CreateDirectory("cards");
              foreach(XmlNode nodeSet in xSet.DocumentElement.SelectNodes("card_sets/item"))
              {
            string setCode = nodeSet.Attributes["code"].Value;
            string setName = xSetLang.DocumentElement.SelectSingleNode("card_sets_lang/item[@code='" + setCode + "' and @language='ENG']/@name").InnerText;

            if(setCode != "M12")
              continue;

            string cardsPath = "cards\\" + setCode + ".xml";
            string cardsLangPath = "cards\\" + setCode + ".eng.xml";
            if(File.Exists(cardsPath))
              File.Delete(cardsPath);
            if(File.Exists(cardsLangPath))
              File.Delete(cardsLangPath);
            XmlDocument xCards = new XmlDocument();
            xCards.LoadXml("<cards />");
            XmlDocument xCardsLang = new XmlDocument();
            xCardsLang.LoadXml("<cards />");

            DateTime setDate = XmlConvert.ToDateTime(nodeSet.Attributes["releaseDate"].Value, "yyyy-MM-ddTHH:mm:ss");
            xCards.DocumentElement.Attributes.Append(xCards.CreateAttribute("releaseDate")).Value = setDate.ToString("yyyy-MM-ddTHH:mm:ss");
            xCards.DocumentElement.Attributes.Append(xCards.CreateAttribute("code")).Value = setCode;

            xCardsLang.DocumentElement.Attributes.Append(xCardsLang.CreateAttribute("name")).Value = setName;

            string contentTextPath = Path.Combine(Path.Combine(CARDS_DIRPATH, setCode), "CONTENT.txt");
            string contentXmlPath = Path.Combine(Path.Combine(CARDS_DIRPATH, setCode), "CONTENT.xml");
            string listPath = Path.Combine(Path.Combine(CARDS_DIRPATH, setCode), "list.xml");

            item = new ListViewItem(setCode);
            ListViewItem.ListViewSubItem subItem = item.SubItems.Add("Working...");
            mList.Items.Add(item);
            mList.EnsureVisible(mList.Items.Count - 1);
            Application.DoEvents();

            progressBar.Minimum = 0;
            progressBar.Step = 1;
            progressBar.Value = 0;

            XmlDocument xCardList = new XmlDocument();
            xCardList.Load(listPath);
            XmlDocument xContent = new XmlDocument();
            string allContent;
            if(!File.Exists(contentTextPath))
            {
              // download page content
              subItem.Text = "Downloading...";
              mList.FindForm().Refresh();
              Application.DoEvents();

              allContent = string.Empty;

              xContent.LoadXml("<content />");
              progressBar.Maximum = xCardList.SelectNodes("//card").Count;
              foreach(XmlNode cardNode in xCardList.SelectNodes("//card"))
              {
            string id = cardNode.SelectSingleNode("@id").InnerText;
            string content = Download(URL_SPOILER + id);
            allContent += content;
            XmlNode nodeContent = xContent.ImportNode(GetDocument(content).DocumentElement, true);
            xContent.DocumentElement.AppendChild(nodeContent);
            progressBar.PerformStep();
            mList.FindForm().Refresh();
            Application.DoEvents();
              }

              File.WriteAllText(contentTextPath, allContent);
              xContent.Save(contentXmlPath);
              subItem.Text = "OK!";
              mList.FindForm().Refresh();
              Application.DoEvents();
            }

            subItem.Text = "Creating...";
            mList.FindForm().Refresh();
            Application.DoEvents();

            xContent.Load(contentXmlPath);
            progressBar.Value = 0;
            progressBar.Maximum = xContent.DocumentElement.SelectNodes("td").Count;
            XmlNodeList cardListNodes = xCardList.DocumentElement.SelectNodes("card");
            XmlNodeList contentNodes = xContent.DocumentElement.SelectNodes("td");
            for(int i = 0; i < cardListNodes.Count; i++)
            {
              SpoilerReader spoilerReader = new SpoilerReader(cardListNodes[i].SelectSingleNode("@name").InnerText,
            cardListNodes[i].SelectSingleNode("@color").InnerText);
              spoilerReader.CreateCardNode(contentNodes[i], xCards, xCardsLang, setCode, setDate, i + 1);
              progressBar.PerformStep();
              mList.FindForm().Refresh();
              Application.DoEvents();
            }
//.........这里部分代码省略.........

        private static void UpdateFileListFiltered(ListView listView, IEnumerable<ListViewItem> items, string filter)
        {
            var selection = new Pair<ListViewItem, int>();

            foreach (var item in items)
            {
                item.Selected = false;

                var filterPos =
                    item.Text.IndexOf(
                        filter,
                        StringComparison.CurrentCultureIgnoreCase);

                if (filterPos < 0)
                    continue;
                
                if (selection.First == null)
                    selection = new Pair<ListViewItem, int>(item, filterPos);
                else if ((filterPos == 0) && (selection.Second != 0))
                    selection = new Pair<ListViewItem, int>(item, filterPos);

                listView.Items.Add(item);
            }

            if (selection.First == null)
                return;

            selection.First.Selected = true;
            listView.EnsureVisible(selection.First.Index);
        }

        internal override void SetError(ListView list,
    ref ListViewItem item,
    string strBarcodeOrRecPath,
    string strError)
        {
            if (item == null)
            {
                item = new ListViewItem(strBarcodeOrRecPath, 0);
                list.Items.Add(item);
            }
            else
            {
                Debug.Assert(item.ListView == list, "");
            }

            // item.SubItems.Add(strError);
            ListViewUtil.ChangeItemText(item, COLUMN_ERRORINFO, strError);

            SetItemColor(item, TYPE_ERROR);

            // 将新加入的事项滚入视野
            list.EnsureVisible(list.Items.IndexOf(item));
        }

 private void AddKeyToScript(ListView listview)
 {
     if (m_selectedKey == null) return;
     listview.Items.Add((ListViewItem)m_selectedKey.Clone());
     listview.EnsureVisible(listview.Items.Count - 1);
     AutoCheckValidity();
 }