1 /// 
  2         /// 計算ListView各類子項ListViewGroup的數量  3         /// 
  4         /// 
       5         private DataTable getNumber(ListView listview)  6         {  7             ArrayList alist = new ArrayList();  8             DataTable dt = new DataTable();  9             dt.Columns.Add("name", typeof(string)); 10             dt.Columns.Add("number", typeof(int)); 11             //獲取各字段名稱 12             for (int i = 0; i < listview.Columns.Count; i++) 13             { 14                 alist.Add(listview.Columns[i].Text); 15             } 16  17             foreach (ListViewGroup group in listview.Groups) 18             { 19                 string b = group.Header; 20                 int c = 0; 21                 foreach (ListViewItem itemRow in group.Items) 22                 { 23  24                     for (int i = 0; i < itemRow.SubItems.Count; i++) 25                     { 26  27                         string s = itemRow.SubItems[i].Text; 28                         if (s == b) 29                         { 30                             c++; 31  32                         } 33                         //getlist = ListViewGroupConvertDatat(lsvData, group); 34  35                     } 36  37                 } 38                 getlist = ListViewGroupConvertDatat(lsvData, group); 39                 //dt.Rows.Add(group.Header, c); 40                 dt.Rows.Add(group.Header, getlist.Rows.Count); 41                 group.Header = group.Header + " 共有(" + getlist.Rows.Count.ToString() + ")條記錄"; 42                 //for (int i = 0; i < alist.Count; i++) 43                 //{ 44                 //    string s = alist[i].ToString(); 45                 //    if (s == b) 46                 //    { 47                 //        getlist = ListViewGroupConvertDatat(lsvData, group); 48                 //        dt.Rows.Add(group.Header, getlist.Rows.Count); 49                 //    } 50                 //} 51  52             } 53             return dt; 54         } 55         /// 
 56         /// ListView Convert DataTabe 57         /// 
 58         ///  59         /// 
      60         private DataTable ListViewConvertDataTabe(ListView lstview) 61         { 62             DataTable dt = new DataTable(); 63             //獲取各字段名稱 64             for (int i = 0; i < lstview.Columns.Count; i++) 65             { 66                 //this.groupBox.Items.Add(lstview.Columns[i].Text); 67                 dt.Columns.Add(lstview.Columns[i].Text, typeof(string)); 68             } 69             //for (int i = 0; i < lstview.Items.Count; i++) 70             //{ 71             //    dt.Rows.Add(lstview.Items[i].SubItems[0].Text, lstview.Items[i].SubItems[1].Text, lstview.Items[i].SubItems[2].Text, lstview.Items[i].SubItems[3].Text, lstview.Items[i].SubItems[4].Text); 72             //} //Which Subitems you want to add in the listview 73             //var listView1 = new ListView(); 74             //DataTable table = new DataTable(); 75              76             foreach (ListViewItem item in lstview.Items) 77             { 78                 DataRow dtRow = dt.NewRow(); 79                 int c = 0;                 80                 foreach (ListViewItem.ListViewSubItem it in item.SubItems) 81                 { 82                     dtRow[c] = it.Text; 83                     c++; 84                     85                 } 86                 dt.Rows.Add(dtRow); 87             } 88             return dt; 89         } 90         /// 
 91         /// 計算ListView 中的子項集合ListViewGroup 92         /// 
 93         ///  94         ///  95         /// 
      96         private DataTable ListViewGroupConvertDatat(ListView lstview, ListViewGroup lstgroup) 97         { 98              99             DataTable dt = new DataTable();100             //獲取各字段名稱101             for (int i = 0; i < lstview.Columns.Count; i++)102             {103                 //this.groupBox.Items.Add(lstview.Columns[i].Text);104                 dt.Columns.Add(lstview.Columns[i].Text, typeof(string));105             }106             107             foreach (ListViewItem item in lstgroup.Items)108             {109 110                 DataRow dtRow = dt.NewRow();111                 int c = 0;112                 //dt.Columns.Add(item.ToString());113                 //for (int i = 0; i < item.SubItems.Count; i++)114                 //{115 116                 //    dtRow[i] = item.SubItems[i].Text;117 118                 //}119                 //ListViewItem.ListViewSubItemCollection;120                // ListViewItem.ListViewSubItem121                 ////ListViewGroupCollection122                 foreach (ListViewItem.ListViewSubItem it in item.SubItems)                123                 {124 125                     dtRow[c] = it.Text;  126                     c++;127                 }128                 dt.Rows.Add(dtRow);129             }130        131 132             return dt;133         }

 用法：在LISTVIEW 绑定数据后。调用：datatble getlist = getNumber(listview);