Form.AutoSize 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

根據 AutoSizeMode 的設定調整表單大小。

public:
 virtual property bool AutoSize { bool get(); void set(bool value); };

[System.ComponentModel.Browsable(true)]
public override bool AutoSize { get; set; }

[<System.ComponentModel.Browsable(true)>]
member this.AutoSize : bool with get, set

Public Overrides Property AutoSize As Boolean

屬性值

Boolean

如果表單將自動調整大小，則為 true；如果必須手動調整大小，則為 false。

屬性

BrowsableAttribute

範例

下列範例顯示使用程式碼建立的表單，其會自動調整大小以符合其內容。 執行時，表單會顯示 Label 、 TextBox 用於輸入 URL 的 ，以及 Button 用於在使用者預設網頁瀏覽器內顯示該 URL 的 。 此範例會使用 FlowLayoutPanel 來配置一個之後的自主控制項。 它也會設定 AutoSize 和 AutoSizeMode 來成長和縮小，以符合其表單的內容。

private void Form1_Load(object sender, EventArgs e)
{
    this.AutoSize = true;
    this.AutoSizeMode = AutoSizeMode.GrowAndShrink;
    this.Text = "URL Opener";

    flowPanel = new FlowLayoutPanel();
    flowPanel.AutoSize = true;
    flowPanel.AutoSizeMode = AutoSizeMode.GrowAndShrink;
    this.Controls.Add(flowPanel);

    urlLabel = new Label();
    urlLabel.Name = "urlLabel";
    urlLabel.Text = "URL:";
    urlLabel.Width = 50;
    urlLabel.TextAlign = ContentAlignment.MiddleCenter;
    flowPanel.Controls.Add(urlLabel);

    urlTextBox = new TextBox();
    urlTextBox.Name = "urlTextBox";
    urlTextBox.Width = 250;
    flowPanel.Controls.Add(urlTextBox);

    urlButton = new Button();
    urlButton.Name = "urlButton";
    urlButton.Text = "Open URL in Browser";
    urlButton.Click += new EventHandler(urlButton_Click);
    flowPanel.Controls.Add(urlButton);
}

void urlButton_Click(object sender, EventArgs e)
{
    try
    {
        Uri newUri = new Uri(urlTextBox.Text);
    }
    catch (UriFormatException uriEx)
    {
        MessageBox.Show("Sorry, your URL is malformed. Try again. Error: " + uriEx.Message);
        urlTextBox.ForeColor = Color.Red;
        return;
    }
    
    // Valid URI. Reset any previous error color, and launch the URL in the 
    // default browser.
    // NOTE: Depending on the user's settings, this method of starting the
    // browser may use an existing window in an existing Web browser process.
    // To get around this, start up a specific browser instance instead using one of
    // the overloads for Process.Start. You can examine the registry to find the
    // current default browser and launch that, or hard-code a specific browser.
    urlTextBox.ForeColor = Color.Black;
    Process.Start(urlTextBox.Text);
}

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Me.AutoSize = True
    Me.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink
    Me.Text = "URL Opener"

    flowPanel = New FlowLayoutPanel()
    flowPanel.AutoSize = True
    flowPanel.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink
    Me.Controls.Add(flowPanel)

    urlLabel = New Label()
    urlLabel.Name = "urlLabel"
    urlLabel.Text = "URL:"
    urlLabel.Width = 50
    urlLabel.TextAlign = ContentAlignment.MiddleCenter
    flowPanel.Controls.Add(urlLabel)

    urlTextBox = New TextBox()
    urlTextBox.Name = "urlTextBox"
    urlTextBox.Width = 250
    flowPanel.Controls.Add(urlTextBox)

    urlButton = New Button()
    urlButton.Name = "urlButton"
    urlButton.Text = "Open URL in Browser"
    flowPanel.Controls.Add(urlButton)
End Sub


Private Sub urlButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles urlButton.Click
    Try
        Dim newUri As New Uri(urlTextBox.Text)
    Catch uriEx As UriFormatException
        MessageBox.Show(("Sorry, your URL is malformed. Try again. Error: " + uriEx.Message))
        urlTextBox.ForeColor = Color.Red
        Return
    End Try

    ' Valid URI. Reset any previous error color, and launch the URL in the 
    ' default browser.
    ' NOTE: Depending on the user's settings, this method of starting the
    ' browser may use an existing window in an existing Web browser process.
    ' To get around this, start up a specific browser instance instead using one of
    ' the overloads for Process.Start. You can examine the registry to find the
    ' current default browser and launch that, or hard-code a specific browser.
    urlTextBox.ForeColor = Color.Black
    Process.Start(urlTextBox.Text)
End Sub

備註

使用 AutoSize 強制表單調整大小以符合其內容。

不論 和 AutoSizeMode 屬性的值 AutoSize 為何，表單都不會在 Visual Studio 表單設計工具中自動調整大小。 表單會根據這兩個屬性的值，正確地調整執行時間本身的大小。 相反地，自訂 UserControl 會在設計階段和執行時間自動調整本身大小。

使用 AutoSize 時， MinimumSize 會遵守 和 MaximumSize 屬性，但會忽略屬性的 Size 目前值。 使用 AutoSize 和 AutoSizeMode 也會轉譯 AutoScroll 屬性不相等，因為無法壓縮表單，使其從檢視中隱藏其自主控制項。

AutoSizeMode如需表單在 為 true 時 AutoSize 的行為相關資訊，請參閱 列舉。