C# 如何从其他表单更新datagridview？

我有两个表单：ProductSelectionForm和QuantityPriceForm

ProductSelection表单包含一个具有3列的datagridview

品名 量 价格 我从getQuantityPrice表单中获取数量和价格，该表单包含两个文本框用于上述值

到目前为止，我一直致力于此代码：

产品选择表：

 public void getQuanPrice() // call getQuantityPrice form
 {
    QuantityPriceForm obj = new QuantityPriceForm(this);
    obj.quant = (int)dgvProducts.CurrentRow.Cells[2].Value;
    obj.agreePrice = (double)dgvProducts.CurrentRow.Cells[3].Value;
    if (obj.ShowDialog() == DialogResult.OK)
    {
      dgvProducts.CurrentRow.Cells[2].Value = obj.quant;
      dgvProducts.CurrentRow.Cells[3].Value = obj.agreePrice;
    }
 }

getQuantityPrice表格：

---

数据网格视图不会更新表格1中的数量和价格列。我做错了什么？

很可能，您的产品选择表单仍将DataGridView控件DGVPProducts设置为默认的私有

您可以将其设置为public，以便您的子窗体可以访问它，但这是一种糟糕的样式

相反，将参数传递给您的子窗体，并在成功时重新读取它们：

产品选择表：

 public void getQuanPrice() // call getQuantityPrice form
 {
    QuantityPriceForm obj = new QuantityPriceForm(this);
    obj.quant = (int)dgvProducts.CurrentRow.Cells[2].Value;
    obj.agreePrice = (double)dgvProducts.CurrentRow.Cells[3].Value;
    if (obj.ShowDialog() == DialogResult.OK)
    {
      dgvProducts.CurrentRow.Cells[2].Value = obj.quant;
      dgvProducts.CurrentRow.Cells[3].Value = obj.agreePrice;
    }
 }

现在，在getQuantityPrice表单上，您需要创建这两个公共属性：

// ProductSelection form1; (you don't need this)

public QuantityPriceForm()
{
  InitializeComponent();
}

public int quant {
  get { return (int)txtQuantity.Text; }
  set { txtQuantity.Text = value.ToString(); }
}

public int agreePrice {
  get { return (double)txtAgreePrice.Text; }
  set { txtAgreePrice.Text = value.ToString(); }
}

private void button1_Click(object sender, EventArgs e)
{
  DialogResult saveData = MessageBox.Show("Do you want to save the data?",
    "Save Data",
    MessageBoxButtons.YesNo,
    MessageBoxIcon.Question);

  if (saveData == DialogResult.OK)
  {
    this.DialogResult = saveData;
    this.Close();
  }
}

---

@Codexer先生，是我还是他事实上，他可能在上课，这是他的家庭作业。

// ProductSelection form1; (you don't need this)

public QuantityPriceForm()
{
  InitializeComponent();
}

public int quant {
  get { return (int)txtQuantity.Text; }
  set { txtQuantity.Text = value.ToString(); }
}

public int agreePrice {
  get { return (double)txtAgreePrice.Text; }
  set { txtAgreePrice.Text = value.ToString(); }
}

private void button1_Click(object sender, EventArgs e)
{
  DialogResult saveData = MessageBox.Show("Do you want to save the data?",
    "Save Data",
    MessageBoxButtons.YesNo,
    MessageBoxIcon.Question);

  if (saveData == DialogResult.OK)
  {
    this.DialogResult = saveData;
    this.Close();
  }
}