Foreach一个列表框，拆分值并在Array中插入splitle value [英] Foreach a listbox, Split the value and Insert splitted value in Array

问题描述

我有这个问题阻止我收集一组适当的数据。

我想要从列表框中取出物品并拆分物品。

分裂项目必须存储在一个数组中



我有这种语法。

I have this problem that prevents me to collect a proper set of data.
I want to Foreach the items from a listbox and split the items.
The splitted items must be store in a single Array

I have this syntax.

while (reader.Read())
   {
      var tmp = reader["Items"];
      if (tmp != DBNull.Value)
      {
        ListBox1.Items.Add(tmp.ToString()); // The data that added in the Listbox is already
                                            // 1 string ("ItemA,ItemB,ItemC,ItemD")
      }
   }
   foreach (var items in ListBox1.Items)
     {
        myDb.Add(new MyItems() { string.Join(",", items) } ); 
         //Here, I want to transfer the items from listbox. 
     }

我从这个过程得到的结果是1个数组中的单个数据，而不是多个数据。

实际结果：

The result I got from this process is a single data in 1 array, not multiple.
Actual Result:

{"ItemA,ItemB,ItemC,ItemD"}

预期结果：

Expected Result:

{ "ItemA", "ItemB", "ItemC", "ItemD" }

我觉得这很有用：

这里 [ ^ ]



和我现在有这个语法。

I found this usefull:
Here[^]

and I have this syntax now.

IEnumerable<string> row;
IEnumerable<string> permutations;
     while (reader.Read())
     {
     var tmp = reader["Items"];
     if (tmp != DBNull.Value)
         {
         ListBox1.Items.Add(tmp.ToString());   
         }
     }
     row = new string[] {ListBox1.Items.ToString()};
     permutations = GetPermutations(row, delimiter: ",");
     foreach (var permutation in permutations)
     {
         myDb.Add(new MyItems() {permutation});
     }                        

Error: {System.Web.UI.WebControls.ListItemCollection}

推荐答案

试试这个

Try this

foreach (var items in ListBox1.Items)
           {
               myDb.Add(new MyItems() { items });
           }
 var array = myDB.ToArray();

也许试试：

Maybe try:

while (reader.Read()) {
   // Here I would like to know how you assign you 'tmp' variable?
   if (tmp != DBNull.Value) {
      ListBox1.Items.Add(tmp.ToString()); // The data that added in the Listbox is already
                                          // 1 string ("ItemA,ItemB,ItemC,ItemD")
   }
}
List<string> list = new List<string>();
foreach (var items in ListBox1.Items) {
   // myDb.Add(new MyItems() { string.Join(",", items) } ); 
   //Here, I want to transfer the items from listbox.
   list.AddRange(((string)items).Split(','));
}
// Here you have a list of single string-elements { "Item1", "Item2", "Item3", "Item4" } obtained from multiple-string elements { "Item1,Item2", "Item3,Item4" }
// Do what you have to do with them in your DB

hi try这个

hi try this

List<string> list = new List<string>();
            foreach (var item in listBox1.Items)
            {
                list.Add(item.ToString());
            }

这样你可以试试。

like this you can try.

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