從線程向DataGridView添加行

Question

我想從兩個單獨的線程向DataGridView添加行。 我嘗試了一些與委托和BeginInvoke，但不起作用。

這是我的行更新程序函數，該函數是從線程中的另一個函數調用的。

    public delegate void GRIDLOGDelegate(string ulke, string url, string ip = "");
    private void GRIDLOG(string ulke, string url, string ip = "")
    {

        if (this.InvokeRequired)
        {
            // Pass the same function to BeginInvoke,
            // but the call would come on the correct
            // thread and InvokeRequired will be false.
            object[] myArray = new object[3];

            myArray[0] = ulke;
            myArray[1] = url;
            myArray[2] = ip;

            this.BeginInvoke(new GRIDLOGDelegate(GRIDLOG),
                                             new object[] { myArray });

            return;
        }

        //Yeni bir satır daha oluştur
        string[] newRow = new string[] { ulke, url, ip };
        dgLogGrid.Rows.Add(newRow);
    }

Answer 1

您可以使用以下代碼：

   private void GRIDLOG(string ulke, string url, string ip = "")
    {
        object[] myArray = new object[] { ulke, url, ip};
        if (this.InvokeRequired)
            dgLogGrid.Invoke((MethodInvoker)(() => dgLogGrid.Rows.Add(myArray)));
        else dgLogGrid.Rows.Add(myArray);
    }

Answer 2

希望這對您有幫助=]

private object[] DatagridBuffer(Person p)
{
    object[] buffer = new object[1];
    buffer[0] = p.FirstName;
    buffer[1] = p.LastName;
    return buffer;
{

public void ListPeople() 
{
    List<DatagridViewRow> rows = new List<DataGridViewRow>();
    Dictionary<int, Person> list = SqlUtilities.Instance.InstallationList();
    int index = 0;
    foreach (Person p in list.Values) {
        rows.Add(new DataGridViewRow());
        rows[index].CreateCells(datagrid, DatagridBuffer(p));
        index += 1;
    }
    UpdateDatagridView(rows.ToArray());
}

public delegate void UpdateDatagridViewDelegate(DataGridViewRow[] list);
public void UpdateDatagridView(DataGridViewRow[] list)
{
    if (this.InvokeRequired)
    {
        this.BeginInvoke(
             new UpdateDatagridViewDelegate(UpdateDatagridView), 
             new object[] { list }
        );
    }
    else
    {
        datagrid.Rows.AddRange(list);
    }
}

如果您發現我的代碼不正確或可以改進，請發表評論。

Answer 3

this.BeginInvoke(new GRIDLOGDelegate(GRIDLOG),
        //error seems to be here -> new object[] { myArray });
        myArray) // <- how it should be

更新：

您也可以這樣操作：

BeginInvoke(new GRIDLOGDelegate(GRIDLOG), ulke, url, ip);

Answer 4

您需要傳遞參數數組。 您在致電時this.BeginInvoke

嘗試這樣：

this.BeginInvoke(new GRIDLOGDelegate(GRIDLOG), new object[] { ulke, url, ip });

其他一切似乎都正確。