Question

我在运行时创建了一个用户身份验证表单，该表单在加载时应该具有焦点。我想关注第一个用于用户名的文本框，但是当表单加载时，表单和文本框都没有焦点。如果我单击表单，则焦点将设置为相应的文本框。

Form frm = Variables.FormCntrls.fmAuth;

            frm.Width = 315;
            frm.Height = 175;
            frm.StartPosition = FormStartPosition.CenterScreen;
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.TopMost = true;
            frm.BackColor = Color.Black;
            frm.ShowInTaskbar = false;
            frm.Opacity = .9;
            frm.Name = "userAuthentication";
            frm.ShowInTaskbar = false;
            frm.KeyPreview = true;
            frm.Visible = true;
            frm.Enabled = true;

            Label lb = new Label()
            {
                Text = "User Authentication",
                Width = frm.Width - 20,
                Height = 30,
                TextAlign = ContentAlignment.MiddleCenter,
                Left = 10,
                Top = 10,
                ForeColor = Color.White,
                Font = new Font("Arial", 16, FontStyle.Bold | FontStyle.Underline)
            };
            frm.Controls.Add(lb);

            lb = new Label()
            {
                Text = "Username: ",
                AutoSize = true,
                TextAlign = ContentAlignment.MiddleCenter,
                Left = 10,
                Top = lb.Bottom + 20,
                ForeColor = Color.White,
                Font = new Font("Arial", 10, FontStyle.Bold)
            };
            frm.Controls.Add(lb);
            TextBox tb = new TextBox()
            {
                Name = "user",
                Width = 200,
                Left = lb.Right + 2,
                Top = lb.Top,
                ForeColor = Color.Black,
                TabIndex = 1,
            };

            frm.Controls.Add(tb);
            tb.Select();


            lb = new Label()
            {
                Text = "Password: ",
                AutoSize = true,
                TextAlign = ContentAlignment.MiddleCenter,
                Left = lb.Left,
                Top = lb.Bottom + 20,
                ForeColor = Color.White,
                Font = new Font("Arial", 10, FontStyle.Bold)
            };
            frm.Controls.Add(lb);
            tb = new TextBox()
            {
                Name = "pass",
                Width = tb.Right - (lb.Right + 2),
                Left = lb.Right + 2,
                Top = lb.Top,
                ForeColor = Color.Black,
                PasswordChar = '*',
                TabIndex = 2,
            };
            frm.Controls.Add(tb);

            Button btn = new Button()
            {
                Name = "UserAuthenticationBtn",
                Width = 75,
                Height = 30,
                Left = tb.Right - 75,
                Top = tb.Bottom + 15,
                Text = "Login",
                BackColor = default(Color),
                UseVisualStyleBackColor = true,
                TabIndex = 3,
            };
            btn.Click += new EventHandler(controlActions.btnActions.btnAuthorize);
            frm.Controls.Add(btn);

            btn = new Button()
            {
                Name = "Cancel",
                Width = 75,
                Height = 30,
                Left = btn.Left - 85,
                Top = tb.Bottom + 15,
                Text = "Cancel",
                BackColor = default(Color),
                UseVisualStyleBackColor = true,
                TabIndex = 4,
            };
            btn.Click += new EventHandler(controlActions.btnActions.btnCancle);
            frm.Controls.Add(btn);

        }
    }

对此的任何帮助都会很棒。我确信我在某个地方错过了一个简单的细节。

Answer 1

创建控件时尝试此操作：

tb.Focus();
tb.Select();

在运行时添加的文本框将无法获得焦点

1 个答案: