Question

private void btnShowCausali_Click(object sender, EventArgs e)
{            
    DataGridView Dati = new DataGridView();
    Dati.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
    Dati.Location = new System.Drawing.Point(120, 40);
    Dati.Name = "Dati";
    Dati.RowTemplate.Height = 24;
    Dati.Size = new System.Drawing.Size(979, 458);
    Dati.TabIndex = 1;
    Dati.Visible = true;
    Dati.Columns.Add("id", "ID");
    Dati.Columns.Add("causaliname", "Nome Causale");
    Dati.Columns.Add("Identificationcode", "Codice Identificativo");
    Dati.Columns.Add("expired", "Data di Scadenza");
    grpDatore.Controls.Add(Dati);      
}

当我运行此代码时，DataGridView不会出现在窗体上。为了防止它产生问题，在表单加载上创建了按钮btnShowCausali。

public void Form1_Load(object sender, EventArgs e)
{
    Button btnShowCausali = new Button();
    btnShowCausali.Text = "Causali";
    btnShowCausali.Location = new Point(20, 20);
    btnShowCausali.Size = new Size(120, 40);
}

顺便说一句，我不知道为什么按钮实际被创建但DataGridView没有。

Answer 1

您的事件处理程序btnShowCausali_Click未附加到Form1_Load中的按钮。你确定它被称为？我也没有看到将此按钮添加到任何容器（Form，Panel，...）您的DataGridView将添加到grpDatore控件（而不是表单）中，因此在设置位置时请记住这一点。

附加活动：

btnShowCausali.Click += btnShowCausali_Click;

Answer 2

首先，如果按钮是动态创建的，请将其添加到用户界面。

Button btnShowCausali = new Button();
btnShowCausali.Text = "Causali";
btnShowCausali.Location = new Point(20, 20); // Make shure there aren't other controls in this point
btnShowCausali.Size = new Size(120, 40);
this.Controls.Add(btnShowCausali); //Adding the button to the form

然后，您必须为按钮的Click事件附加事件处理程序。简而言之，您必须告诉按钮单击时要执行的操作。您有两个选项可以为click事件添加事件处理程序：

代码：在btnShowCausali.Click += btnShowCausali_Click;函数调用（在构造函数中）或表单的InitializeComponent事件之后添加Load。然后添加函数btnShowCausali_Click：

private void btnShowCausali_Click(object sender, EventArgs e)
{
     DataGridView Dati = new DataGridView();
    Dati.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
    Dati.Location = new System.Drawing.Point(120, 40);
    Dati.Name = "Dati";
    Dati.RowTemplate.Height = 24;
    Dati.Size = new System.Drawing.Size(979, 458);
    Dati.TabIndex = 1;
    Dati.Visible = true;
    Dati.Columns.Add("id", "ID");
    Dati.Columns.Add("causaliname", "Nome Causale");
    Dati.Columns.Add("Identificationcode", "Codice Identificativo");
    Dati.Columns.Add("expired", "Data di Scadenza");
    grpDatore.Controls.Add(Dati); // DataGridView added to grpDatore, not form. Make shure grpDatore is visible.
}

设计师：双击按钮。 Visual Studio将为您带来魔力。

我需要动态地向表单添加DataGridView

2 个答案: