我的代码无法从 form2 a 的 datagridview 添加项目到 form 1 的列表框。但它适用于插入到文本框

Question

表格 2

public string[] thislistboxitems;
private string pVal;
public string PassVal
{
    get { return pVal; }
    set { pVal = value; }
}

private void Form3_Load(object sender, EventArgs e)
{
    ListBox1.Text = pVal;
}

表格 1

Form2 f = new Form2();
{
    int selectedCellCount = dataGridView1.GetCellCount(DataGridViewElementStates.Selected);

    if (selectedCellCount > 0)
    {
        for (int i = 0; i < selectedCellCount; i++)
        {
            int column = dataGridView1.SelectedCells[i].ColumnIndex;
            int row = dataGridView1.SelectedCells[i].RowIndex;
            f.PassVal = dataGridView1[column, row].Value.ToString();
        }
    }

    f.Show();
}

Answer 1

您需要将所选值添加为列表框中的项目。

private void Form3_Load(object sender, EventArgs e)
{
    ListBox1.Items.Add(pVal);
}

Answer 2

在 Form2 中创建一个可以从 Form1 调用的 public 方法

public void AddToListBox(string itemText)
{
    this.ListBox1.Items.Add(itemText);
}

并在 Form1 中更改循环以调用此方法

Form2 f = new Form2();
int selectedCellCount = dataGridView1.GetCellCount(DataGridViewElementStates.Selected);

if (selectedCellCount > 0)
{
    for (int i = 0; i < selectedCellCount; i++)
    {
        int column = dataGridView1.SelectedCells[i].ColumnIndex;
        int row = dataGridView1.SelectedCells[i].RowIndex;
        f.AddToListBox(dataGridView1[column, row].Value.ToString());
    }
}
f,Show();

我的代码无法从 form2 a 的 datagridview 添加项目到 form 1 的列表框。但它适用于插入到文本框

my code to add items to a list box of form1 from a datagrid view from form2 a isnt working. but it works for inserting to a textbox

c#

datagridview

listbox