Question

我有2个特定列的列表视图，但我不能用它做减法。在列表视图1中，我有7列，列表视图2中的5列。我想在listview 2中使用“banyak”在listview 1中减去列“banyak”。当我输入此代码时，数据不会出现在listview中。但我可以编译该程序。请帮我！这是我的代码：

在listview 1中

private void button3_Click(object sender, EventArgs e)
    {
        try
        {
            con.Open();
            cmd.Connection = con;
            cmd.CommandText = "select nama_peminjam,nobp_nip,nohp,nama_komponen,jenis_komponen,peminjaman_alat.banyak,tanggal from db_coba.peminjaman_alat,db_coba.list_komponen where db_coba.peminjaman_alat.komponen_id=db_coba.list_komponen.komponen_id";
            cmd.ExecuteNonQuery();

            baca = cmd.ExecuteReader();

            peminjaman_alat.Items.Clear();

            while (baca.Read())
            {
                ListViewItem item = new ListViewItem(baca["nama_peminjam"].ToString());
                item.SubItems.Add(baca["nobp_nip"].ToString());
                item.SubItems.Add(baca["nohp"].ToString());
                item.SubItems.Add(baca["nama_komponen"].ToString());
                item.SubItems.Add(baca["jenis_komponen"].ToString());
                item.SubItems.Add(baca["banyak"].ToString());
                item.SubItems.Add(baca["tanggal"].ToString());

                peminjaman_alat.Items.Add(item);


            }
            con.Close();
        }
        catch (Exception ex)
        {
            con.Close();
        }
    }

列表视图2中的

private void button8_Click(object sender, EventArgs e)
    {
        try
        {
            con.Open();
            cmd.Connection = con;
            cmd.CommandText = "select nama_komponen,list_komponen.status,jenis_komponen,nfc_tag,list_komponen.banyak,peminjaman_alat.banyak from db_coba.list_komponen,db_coba.peminjaman_alat where db_coba.list_komponen.komponen_id=db_coba.peminjaman_alat.komponen_id";
            cmd.ExecuteNonQuery();

            baca = cmd.ExecuteReader();

            listkomponen.Items.Clear();



            while (baca.Read())
            {
                ListViewItem item = new ListViewItem(baca["nama_komponen"].ToString());

                item.SubItems.Add(baca["jenis_komponen"].ToString());
                item.SubItems.Add(baca["nfc_tag"].ToString());
                item.SubItems.Add(baca["banyak"].ToString());                
                item.SubItems.Add(baca["status"].ToString());
                if (peminjaman_alat.SelectedIndices.Count == 0) return;

                string banyak_peminjaman = peminjaman_alat.SelectedItems[0].SubItems[3].Text;
                item.SubItems[3].Text = (Int32.Parse(item.SubItems[3].Text) - Int32.Parse(banyak_peminjaman)).ToString();

                listkomponen.Items.Add(item);

            }


            con.Close();
        }
        catch (Exception ex)
        {
            con.Close();
        }

    }

我希望你能理解我的意思。

Answer 1

只需检查此功能。参考链接MSDN 示例图像参考

    public void AddItemsOne()
    {
        // Set the view to show details.
        listView1.View = View.Details;

        ListViewItem item1 = new ListViewItem("item1",0);
        // Place a check mark next to the item.
        //item1.Checked = true;
        item1.SubItems.Add("1");
        item1.SubItems.Add("2");
        item1.SubItems.Add("3");           
        item1.SubItems.Add("4");

        // Create columns for the items and subitems.
        // Width of -2 indicates auto-size.
        listView1.Columns.Add("Item Column", -2, HorizontalAlignment.Left);
        listView1.Columns.Add("Item Sub Column One", -2, HorizontalAlignment.Left);
        listView1.Columns.Add("Item Sub Column Two", -2, HorizontalAlignment.Left);
        listView1.Columns.Add("Item Sub Column Three", -2, HorizontalAlignment.Left);
        listView1.Columns.Add("Item Sub Column Four", -2, HorizontalAlignment.Left);

        //Add the items to the ListView.
        listView1.Items.AddRange(new ListViewItem[] { item1 });

        // Add the ListView to the control collection.
        this.Controls.Add(listView1);                   
    }

c＃ - 如何在不同列表视图中的两列之间进行减法

1 个答案: