我對 Visual Studio C# listview 項目有疑問，無法通過谷歌搜索找到解決方案。我是用帶有列表視圖的應用程序制作的，我可以添加、刪除、更新列表視圖項目。我使用以下代碼正確保存列表視圖到文件或從文件加載列表視圖： private void saveListViewItems(string path, ListView lv) { var delimeteredListviewData = new List<string>(); string delimeteredItems = string.Empty; foreach (ListViewItem lvi in lv.Items) { foreach (ListViewItem.ListViewSubItem lvsi in lvi.SubItems) { delimeteredItems += lvsi.Text + "#"; } delimeteredListviewData.Add(delimeteredItems); } System.IO.File.WriteAllLines(path, delimeteredListviewData.ToArray()); } private void loadListViewItems(string path, ListView lv) { foreach (string line in System.IO.File.ReadAllLines(path)) { lv.Items.Add(new ListViewItem(line.Split(new char[] { '#' }, StringSplitOptions.RemoveEmptyEntries))); } }問題是我已經激活了每個項目旁邊的復選框。我無法保存選中復選框的列表視圖項目。我想保存列表視圖并加載所選項目。謝謝
3 回答
呼啦一陣風
TA貢獻1802條經驗 獲得超6個贊
像這樣的東西？：
List<string> delimeteredItems = new List<string>();
foreach (ListViewItem lvi in listView1.CheckedItems)
{
string item= String.Join("#", lvi.SubItems.Cast<ListViewItem.ListViewSubItem>().Select(si=>si.Text));
delimeteredItems.Add(item);
}
System.IO.File.WriteAllLines(@"c:\temp\lines.txt", delimeteredItems);
萬千封印
TA貢獻1891條經驗 獲得超3個贊
我已經管理該程序以使其正常工作。我對讀/寫文本文件的方式是錯誤的。現在我正在使用 ini-parser nuget。
將ini解析器安裝到項目中。然后：
使用 IniParser；
使用 IniParser.Model；
private void saveListViewItems(string path, ListView lv)
{
int i = 0;
string IPFrom;
string IPFromval;
string IPTO;
string IPTOval;
string Comment;
string Commentval;
string CheckState;
string CheckStateval;
int IPSectioncount;
var parser = new FileIniDataParser();
IniData data = parser.ReadFile(path);
while ( i < lv.Items.Count) {
if ((lv.Items[i].Selected) || (lv.Items[i].Checked))
{
CheckStateval = "1";
}
else
{
CheckStateval = "0";
}
CheckState = "";
CheckState = "CheckState";
CheckState += String.Join(CheckState, i);
IPFromval = lv.Items[i].SubItems[0].Text;
IPFromval = "";
IPFrom = "IPFrom";
IPFrom += String.Join(IPFrom, i);
IPFromval = lv.Items[i].SubItems[0].Text;
IPTOval = "";
IPTO = "IPTO";
IPTO += String.Join(IPTO, i);
IPTOval = lv.Items[i].SubItems[1].Text;
Commentval = "";
Comment = "Comment";
Comment += String.Join(Comment, i);
Commentval = lv.Items[i].SubItems[2].Text;
data["IP"][CheckState] = CheckStateval;
data["IP"][IPFrom] = IPFromval;
data["IP"][IPTO] = IPTOval;
data["IP"][Comment] = Commentval;
i++;
}
IPSectioncount = lv.Items.Count;
data["IP"]["IPSectionCount"] = IPSectioncount.ToString();
parser.WriteFile(path, data);
}
private void loadListViewItems(string path, ListView lv)
{
string IPFrom;
string IPTO;
string Comment;
string CheckState;
string IPSectioncount;
string row="";
var parser = new FileIniDataParser();
IniData data = parser.ReadFile(path);
IPSectioncount = data["IP"]["IPSectionCount"];
int m = Int32.Parse(IPSectioncount);
int i = 0;
while ( i < m )
{
IPFrom = "";
IPTO = "";
Comment = "";
row = "";
IPFrom = "IPFrom";
IPFrom += String.Join(IPFrom, i);
IPFrom = data["IP"][IPFrom];
IPTO = "IPTO";
IPTO += String.Join(IPTO, i);
IPTO = data["IP"][IPTO];
Comment = "Comment";
Comment += String.Join(Comment, i);
Comment = data["IP"][Comment];
CheckState = "CheckState";
CheckState += String.Join(CheckState, i);
CheckState = data["IP"][CheckState];
row = String.Join(",",IPFrom,IPTO,Comment);
lv.Items.Add(new ListViewItem(row.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries)));
if (CheckState == "1")
{
lv.Items[i].Checked = true;
}
i++;
}
}
瀟湘沐
TA貢獻1816條經驗 獲得超6個贊
您需要保存更多信息，而不是僅保存字符串。您可以添加 IsChecked 值和字符串。您需要一個小的包裝類來將這兩個值作為屬性保存。
然后您可以使用序列化，它是一個術語，描述將對象轉換為可以存儲在磁盤上的內容的方法。
有很多格式可供選擇，但 Json 是一種很好的可讀格式。您可以通過 nuget 包管理器下載 Nuget 包 NewtonSoft.Json。
public class StoreListView
{
public void StoreToDisk(string path, List<ItemDataHolder> list)
{
string theListInJsonFormat = JsonConvert.SerializeObject(list);
File.WriteAllText(path, theListInJsonFormat);
}
}
public class ItemDataHolder
{
public string SomeValuesYouWantToSave { get; set; }
public bool IsChecked { get; set; }
}
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