操作系统:Windows Mobile 5/Compact .NET Framework(Form.AcceptButton() 不可用)
我正在使用 ShowDialog() 显示模态窗体。我希望能够在按下 ENTER 键时提交模态表单。当按下 ENTER 键时,我能够获取 KEYDOWN EVENT。
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
}
}
}
最佳答案
我建议改为将按钮单击分离到一个方法中,然后您可以调用该方法
经过编辑以说明 Compacted Framework。
给你的文本框添加一个名称属性
TextBox textBox = new TextBox() { Name = "the_textBox" ....
更改您的确认。点击这里
confirmation.Click += (sender, e) => { Confirmation_Click(prompt); };
添加这个方法
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();
}
用这个替换你的 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);
}
}
关于c# - 按下 ENTER 键后提交表格,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22151728/