C# selected item from listbox to datagridview

Question

1.00/5 (1 vote)

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i have ItemID, ItemName, Quantity, Date and ItemStatus from inventory table in sql database.

i only want the ItemID and itemName the quantity will be reduced if i want 5 qty from selected item if item has 21 it should be reduce to 16

Capture5 — imgbb.com[^]

when i add selected item from listbox and display it to datagridview it returns system.data.datarowview

What I have tried:

private void Checkout_Load(object sender, EventArgs e)
        {
            LoadData();
        }



        public void LoadData()
        {
            SqlConnection con = Connection.GetConnection();

            SqlDataAdapter sda = new SqlDataAdapter("Select * From [Inventory].[dbo].[Inventory]", con);


            DataTable dt = new DataTable();
            sda.Fill(dt);



            listBox1.DataSource = dt;
            listBox1.DisplayMember = "ItemName";
            listBox1.ValueMember = "ItemID";

            dataGridView1.Rows.Clear();
                                  
            
                foreach (var item in listBox1.SelectedItems)
                {
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["Column1"].Value = item.ToString();
                    dataGridView1.Rows[index].Cells["Column2"].Value = item.ToString();
                    dataGridView1.Rows[index].Cells["Column3"].Value = textBox3.Text;
                    dataGridView1.Rows[index].Cells["Column4"].Value = textBox1.Text;
                }
            
        }
            




        private void buttonAddtoCart_Click(object sender, EventArgs e)
        {
            LoadData();
        }

       
    }

}

Posted 18-Oct-19 22:43pm

Member 14608841

Updated 18-Oct-19 23:52pm

v3

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Comments

Keith Shirogane 19-Oct-19 8:55am

i know its already solved but i'm just gonna put it here since i can't add another solution

var itemid = (listBox1.SelectedItem as DataRowView)["ItemID"].ToString();
var itemname = (listBox1.SelectedItem as DataRowView)["ItemName"].ToString();

int n = dataGridView1.Rows.Add();

dataGridView1.Rows[n].Cells["Column1"].Value = itemid;
dataGridView1.Rows[n].Cells["Column2"].Value = itemname;
dataGridView1.Rows[n].Cells["Column3"].Value = textBox3.Text;
dataGridView1.Rows[n].Cells["Column4"].Value = textBox1.Text;

}

Richard MacCutchan 19-Oct-19 9:09am

Thank you for the extra information. As I mentioned below my DataBinding fu is not so good.

Keith Shirogane 19-Oct-19 10:28am

don't worry about it.. we're all still learning. :D

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Richard MacCutchan · Accepted Answer · 2019-10-18T23:22:00

I have looked into this and it appears that because of data binding, the values returned in the SelectedItems list are DataRowView objects. Each of which contains the DataRow of the data source as a member. So the following code will list your items.

C#

foreach (DataRowView rowview in listBox1.SelectedItems)
{
    int index = dataGridView1.Rows.Add();
    var itemid = rowview["ItemID"].ToString();
    var itemname = rowview["ItemName"].ToString();
    dataGridView1.Rows[index].Cells["Column1"].Value = itemid;
    dataGridView1.Rows[index].Cells["Column2"].Value = itemname);
}

I suspect this is not actually the proper way to do it but my knowledge of data binding is rather sketchy at best.

[edit]
Updated with improved code, thanks to Keith Shirogane.
[/edit]