[英]Submit FORM on ENTER key pressed
OS: Windows Mobile 5 / Compact .NET Framework (Form.AcceptButton() NOT available) 操作系统:Windows Mobile 5 / Compact .NET Framework(不提供Form.AcceptButton())
I am showing a modal form with ShowDialog(). 我正在用ShowDialog()显示模态形式。 I want to be able to submit the modal form on hitting the ENTER key. 我希望能够在按ENTER键后提交模式表单。 I am able to grab the KEYDOWN EVENT when ENTER key is pressed. 按下ENTER键时,我可以抓住KEYDOWN事件。
Any other solution will be appreciated too. 任何其他解决方案也将不胜感激。
public class Prompt
{
public static string AcceptTagPrice()
{
Form prompt = new Form();
prompt.WindowState = System.Windows.Forms.FormWindowState.Maximized;
prompt.TopMost = true;
prompt.BackColor = System.Drawing.Color.White;
prompt.KeyPreview = true;
prompt.MaximizeBox = true;
Label textLabel = new Label() { Text = "Enter Price", Left = 20, Top = 50, Width = 200, TextAlign = ContentAlignment.TopCenter, ForeColor = System.Drawing.Color.Green, Font = new System.Drawing.Font("Tahoma", 11F, System.Drawing.FontStyle.Bold) };
TextBox textBox = new TextBox() { Left = 20, Top = 100, Size = new System.Drawing.Size(202, 31), BackColor = System.Drawing.Color.LightGray }; ;
Button confirmation = new Button() { Text = "Submit", Left = 30, Top = 140, Size = new System.Drawing.Size(121, 33), BackColor = System.Drawing.Color.LightSkyBlue };
confirmation.Click += (sender, e) => { bool k = IsValidPrice(textBox.Text); if (k) { prompt.Close(); } else { textBox.Focus(); } };
prompt.KeyDown += new System.Windows.Forms.KeyEventHandler(Prompt.ModalForm_KeyDown);
prompt.Controls.Add(confirmation);
prompt.Controls.Add(textLabel);
prompt.Controls.Add(textBox);
textBox.Focus();
prompt.Activate();
prompt.ShowDialog();
return textBox.Text.ToString().Trim();
}
public static bool IsValidPrice(string price)
{
if (!Regex.IsMatch(price, @"^[0-9]\d*(\.\d+)?$"))
{
MessageBox.Show("Please enter a valid price", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1);
return false;
}
else
{
return true;
}
}
private static void ModalForm_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyData == Keys.Enter)
{
Messagebox.Show("Enter Key Pressed");
// BUT DUNNO HOW TO TRIGGER CONFIRMATION BUTTON CLICK EVENT
}
}
}
Sounds like you just need to call confirmation.PerformClick()
when the Enter key is pressed. 听起来您只需confirmation.PerformClick()
Enter键即可调用confirmation.PerformClick()
。 The easiest way to do this is to pass along the confirmation
button as a part of the key press. 最简单的方法是将confirmation
按钮作为按键的一部分传递。
prompt.KeyDown += (sender, e) => ModalForm_KeyDown(sender, e, confirmation);
...
private static void ModalForm_KeyDown(object sender, KeyEventArgs e, Button confirmation) {
if (e.KeyData == Keys.Enter) {
Messagebox.Show("Enter Key Pressed");
confirmation.PerformClick();
}
}
** EDIT ** **编辑**
Apparently PerformClick
isn't available on compact framework. 显然, PerformClick
在紧凑型框架上不可用。 In that case I would just add a public
method which is responsible for closing the Form
. 在那种情况下,我只需要添加一个public
方法来关闭Form
。 The button click handler would just feed into this method so that there is a single code path 按钮单击处理程序将仅输入此方法,因此只有一个代码路径
I would recommend instead separating the button click into a method which you can then call 我建议改为将按钮单击分为一种方法,然后可以调用该方法
Edited to account for Compacted Framework. 编辑以考虑压缩框架。
Add a name property to your textBox 将名称属性添加到您的文本框
TextBox textBox = new TextBox() { Name = "the_textBox" ....
change your confirmation.Click to this 更改您的确认。单击此处
confirmation.Click += (sender, e) => { Confirmation_Click(prompt); };
add this method 添加此方法
private static void Confirmation_Click(Form prompt)
{
TextBox textBox = prompt.Controls.Find("the_textBox", false).FirstOrDefault() as TextBox;
if(textBox == null)
return; //uhm weird
bool k = IsValidPrice(textBox.Text);
if (k)
prompt.Close();
else
textBox.Focus();
}
Replace your KeyDown Method with this 以此替换您的KeyDown方法
private static void ModalForm_KeyDown(object sender, KeyEventArgs e)
{
Form form = sender as Form;
if(form == null)
return; //uhm weird
if (e.KeyData == Keys.Enter)
{
Confirmation_Click(form);
}
}
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