Question

我正在尝试以编程方式从2个不同的数据源构建DataGrid。我有一个List和一个DataGrid。问题不在于我的数据处理，而是与DataGridViewRow对象的值有关。这是我的代码：

    protected void buildGrid()
    {
        dgResults.Columns.Add( "sku", "SKU" );
        dgResults.Columns.Add( "itemID", "Item ID" );
        dgResults.Columns.Add( "productName", "Product Name" );
        dgResults.Columns.Add( "eBayQty", "eBay Qty" );
        dgResults.Columns.Add( "stockQty", "Stock Qty" );
        dgResults.Columns.Add( "difference", "Difference" );

        //Add the eBayItem data to the table
        foreach ( string[] eBayItem in ebayItems )
        {
            string SKU = eBayItem[1].ToString();
            int eBayQty = Convert.ToInt32(eBayItem[2]);
            string ProductName = "";
            int stockQty = 0;
            int qtyDifference = 0;

            DataRow[] rows = dbData.Select( "sku ='" + SKU + "'" );
            if (rows.Length == 1) {
                stockQty = Convert.ToInt32( rows[0]["quantity"] );
                ProductName = rows[0]["ProductName"].ToString();
            }
            qtyDifference = stockQty - eBayQty;

            DataGridViewRow dgvr = new DataGridViewRow();
            dgvr.SetValues( SKU, eBayItem[0].ToString(), ProductName, eBayQty, stockQty, qtyDifference );

            if ( qtyDifference != 0 || eBayQty > stockQty )
            {
                dgvr.DefaultCellStyle.BackColor = System.Drawing.Color.Red;
                dgvr.DefaultCellStyle.ForeColor = System.Drawing.Color.White;
            }
            else if ( stockQty > eBayQty )
                dgvr.DefaultCellStyle.BackColor = System.Drawing.Color.LightGoldenrodYellow;
            else
                dgvr.DefaultCellStyle.BackColor = System.Drawing.Color.GreenYellow;

            dgResults.Rows.Add(dgvr);
        }
    }

行正在添加到DataGrid并且它们正在被适当地着色，但行中的每个单元格都不包含数据？我最终得到的是几个空白行，它们的背景属性已设置。

有人有任何想法吗？

提前致谢。

Answer 1

尝试在DataGridViewRow上使用BeginEdit和EndEdit

Answer 2

这是我采取这样做的解决方案。

为了演示目的我构建了一个EbayItem类： -

public class EbayItem
    {

        public EbayItem()
        {

        }

        public EbayItem(string sku, int id, string product, int ebayqty, int stockqty)
        {
            SKU = sku;
            ID = id;
            ProductName = product;
            ebayQty = ebayqty;
            stockQty = stockqty;

        }
        public string SKU { get; set; }
        public int ID { get; set; }
        public string ProductName { get; set; }
        public int ebayQty { get; set; }
        public int stockQty { get; set; }
        public int difference
        {

            get { return stockQty - ebayQty; }
            set { difference =  value; }
        }

    }

在Windows窗体（Form1_Load）中，我创建了一些测试条目并将它们添加到List对象中。最后一个条目看起来买2枚手榴弹，但库存为零： -

List<EbayItem> Inventory = new List<EbayItem>();

Inventory.Add(new EbayItem("SKU1", 1, "Ski-Mask", 1, 10));
Inventory.Add(new EbayItem("SKU2", 2, "Shotgun", 1, 10));
Inventory.Add(new EbayItem("SKU3", 3, "Rounds", 5, 10));
Inventory.Add(new EbayItem("SKU4", 4, "Grenade", 2, 0));

我没有手动向我的DataGridView添加行，而是创建一个BindingSource并用我的库存填充它： -

BindingSource bs = new BindingSource(Inventory, null);

接下来，为我的DGV分配数据源，将其设置为Binding对象。这意味着对列表对象所做的任何更改都会自动波及DGV： -

dataGridView1.DataSource = bs;

现在剩下的就是利用DGV的CellFormatting事件句柄。我用它来突出显示股票差异为零或更小的任何行： -

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            int colIndex = e.ColumnIndex;
            int rowIndex = e.RowIndex;

            if (rowIndex >= 0 && colIndex >= 0)
            {
                DataGridViewRow theRow = dataGridView1.Rows[rowIndex];

                int difference = (int)theRow.Cells[5].Value;

                if (difference <= 0)
                {
                    theRow.DefaultCellStyle.BackColor = System.Drawing.Color.Red;
                    theRow.DefaultCellStyle.ForeColor = System.Drawing.Color.White;
                }
            }

        }

希望这有帮助。

构建DataGridViewRow并添加到DataTable

2 个答案: