C# TextBox.Focus方法代码示例

	public static DialogResult Show(string title, string promptText, ref string value, InputBoxValidation validation)
	{
		Form form = new Form();
		Label label = new Label();
		TextBox textBox = new TextBox();
		Button button = new Button();
		Button button1 = new Button();
		form.Text = title;
		label.Text = promptText;
		textBox.Text = value;
		button.Text = "OK";
		button1.Text = "Cancel";
		button.DialogResult = DialogResult.OK;
		button1.DialogResult = DialogResult.Cancel;
		label.SetBounds(9, 20, 372, 13);
		textBox.SetBounds(12, 36, 372, 20);
		button.SetBounds(228, 72, 75, 23);
		button1.SetBounds(309, 72, 75, 23);
		label.AutoSize = true;
		textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
		button.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
		button1.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
		form.ClientSize = new Size(396, 107);
		Control.ControlCollection controls = form.Controls;
		Control[] controlArray = new Control[] { label, textBox, button, button1 };
		controls.AddRange(controlArray);
		form.ClientSize = new Size(Math.Max(300, label.Right + 10), form.ClientSize.Height);
		form.FormBorderStyle = FormBorderStyle.FixedDialog;
		form.StartPosition = FormStartPosition.CenterScreen;
		form.MinimizeBox = false;
		form.MaximizeBox = false;
		form.AcceptButton = button;
		form.CancelButton = button1;
		if (validation != null)
		{
			form.FormClosing += new FormClosingEventHandler((object sender, FormClosingEventArgs e) => {
				if (form.DialogResult == DialogResult.OK)
				{
					string text = validation(textBox.Text);
					bool flag = text != "";
					bool flag1 = flag;
					e.Cancel = flag;
					if (flag1)
					{
						MessageBox.Show(form, text, "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Hand);
						textBox.Focus();
					}
				}
			});
		}
		DialogResult dialogResult = form.ShowDialog();
		value = textBox.Text;
		return dialogResult;
	}

  public static DialogResult Show(string title, string promptText, ref string value,
                                  InputBoxValidation validation)
  {
    Form form = new Form();
    Label label = new Label();
    TextBox textBox = new TextBox();
    Button buttonOk = new Button();
    Button buttonCancel = new Button();

    form.Text = title;
    label.Text = promptText;
    textBox.Text = value;

    buttonOk.Text = "OK";
    buttonCancel.Text = "Cancel";
    buttonOk.DialogResult = DialogResult.OK;
    buttonCancel.DialogResult = DialogResult.Cancel;

    label.SetBounds(9, 20, 372, 13);
    textBox.SetBounds(12, 36, 372, 20);
    buttonOk.SetBounds(228, 72, 75, 23);
    buttonCancel.SetBounds(309, 72, 75, 23);

    label.AutoSize = true;
    textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
    buttonOk.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
    buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;

    form.ClientSize = new Size(396, 107);
    form.Controls.AddRange(new Control[] { label, textBox, buttonOk, buttonCancel });
    form.ClientSize = new Size(Math.Max(300,label.Right+10), form.ClientSize.Height);
    form.FormBorderStyle = FormBorderStyle.FixedDialog;
    form.StartPosition = FormStartPosition.CenterScreen;
    form.MinimizeBox = false;
    form.MaximizeBox = false;
    form.AcceptButton = buttonOk;
    form.CancelButton = buttonCancel;
    if (validation != null) {
      form.FormClosing += delegate(object sender, FormClosingEventArgs e) {
        if (form.DialogResult == DialogResult.OK) {
          string errorText = validation(textBox.Text);
          if (e.Cancel = (errorText != "")) {
            MessageBox.Show(form, errorText, "Validation Error",
                            MessageBoxButtons.OK, MessageBoxIcon.Error);
            textBox.Focus();
          }
        }
      };
    }
    DialogResult dialogResult = form.ShowDialog();
    value = textBox.Text;
    return dialogResult;
  }

 public void TestHighlightOfValueWhenFocused()
 {
     NumericUpDown nud = DefaultNumericUpDownToTest;
     nud.IsEnabled = true;
     nud.Maximum = 500;
     nud.Value = 244;
     TextBox tb = new TextBox(); 
     TestAsync(
         nud,
         () => tb = (TextBox)TestExtensions.GetChildrenByType(nud, typeof(TextBox)),
         () => tb.Focus(),
         () => Assert.AreEqual(nud.Value, Convert.ToDouble(tb.SelectedText, CultureInfo.CurrentCulture)));
 }

 public void TestTabbingOutNumericUpDown()
 {
     NumericUpDown nud = DefaultNumericUpDownToTest;
     nud.DecimalPlaces = 1;
     nud.Value = 50.8;
     TextBox tb = new TextBox();
     RepeatButton rb = new RepeatButton();
     TestAsync(
         nud,
         () => tb = (TextBox)TestExtensions.GetChildrenByType(nud, typeof(TextBox)),
         () => tb.Focus(),
         () => rb = (RepeatButton)TestExtensions.GetChildrenByType(nud, typeof(RepeatButton)),
         () => rb.Focus(),
         () => Assert.IsFalse(rb.IsFocused));
 }

    /**
     * Tarkistaa, onko syöte desimaalisluku ja olemassa.
     */
    protected Boolean IsDouble(String input, TextBox sender)
    {
        if (sender == null)
        {
            return false;
        }

        if (input == null)
        {
            sender.Focus();
            return false;
        }

        double number = 0;
        if (input.Length > 0 && Double.TryParse(input, out number))
        {
            return true;
        }
        else
        {
            sender.Focus();
            return false;
        }
    }

 public bool IsDecimal(TextBox textBox)
 {
     decimal number = 0m;
     if (Decimal.TryParse(textBox.Text, out number))
     {
         return true;
     }
     MessageBox.Show("Går ej att konvertera");
     textBox.Focus();
     return false;
 }

        public virtual void CoerceInputTextOnLostFocus()
        {
            NumericUpDown nud = new NumericUpDown { Maximum = 100, Minimum = 0, Value = 50 };
            TextBox part = null;
            TextBox other = new TextBox();

            StackPanel panel = new StackPanel();
            panel.Children.Add(nud);
            panel.Children.Add(other);

            TestAsync(
                100,
                panel,
                () => part = nud.GetVisualDescendents().OfType<TextBox>().FirstOrDefault(),
                () => Assert.IsNotNull(part, "Could not find TextBox template part!"),
                () => part.Focus(),
                () => part.Text = "999",
                () => other.Focus(),
                () => Assert.AreEqual(100, nud.Value, "NumericUpDown did not coerce the value to 100!"));
        }

    public bool IsPresent(TextBox textBox)
    {
        if (textBox.Text == "")
        {
            MessageBox.Show("ej tomma fält");
            textBox.Focus();
            return false;
        }

        return true;
    }

    public bool IsRSS(TextBox textBox)
    {
        if (textBox.Text != "" && textBox.Text.Contains("/rss"))
        {
            return true;
        }
        MessageBox.Show("Fältet får inte vara tomt och måste innhehålla /Rss");
        textBox.Focus();

        return false;
    }

 /// <summary>
 /// 错误处理
 /// </summary>
 /// <param name="lblError">错误标签</param>
 /// <param name="strError">错误信息</param>
 /// <param name="txtFocus">错误的文本框</param>
 private void DoWellError(Label lblError, AccountState state, TextBox txtFocus)
 {
     string strError = String.Empty;
     strError = ShineKJ.Model.Power.Account.GetEnumValue.GetDescription((ShineKJ.Model.Power.Account.AccountState)state);
     lblError.Text = strError;
     txtPassword.Text = "";
     txtFocus.Focus();
 }

    /**
     * Tarkistaa, että tekstisyöte on annettu.
     */
    protected Boolean IsNotEmpty(String input, TextBox sender)
    {
        if (sender == null)
        {
            return false;
        }

        if (input == null)
        {
            sender.Focus();
            return false;
        }

        if (input.Length > 0)
        {
            return true;
        }
        else
        {
            sender.Focus();
            return false;
        }
    }

    void JumpToTextBox(TextBox textbox)
    {
        textbox.Focus();

        textbox.SelectionLength = 0;
        textbox.SelectionStart = textbox.Text.Length;
    }

    private void loadDatafromZipcode(TextBox txtzipcode, HiddenField hdnZipCode, TextBox txtCity, DropDownList ddlcountry, DropDownList ddlprovince, TextBox txtfirstName, Label lblZipCode)
    {
        DataTable dt;
        dt = OrganizationInfo.GetCityStateAndCountryByZipCode(txtzipcode.Text.Trim(), GlobalCountryID);

        if (dt.Rows.Count > 0)
        {
            hdnZipCode.Value = Convert.ToString(dt.Rows[0]["ZipcodeID"]);
            txtCity.Text = Convert.ToString(dt.Rows[0]["CityName"]);
            if (ddlcountry.Items.FindByValue(Convert.ToString(dt.Rows[0]["CountryId"])) != null)
                ddlcountry.SelectedValue = Convert.ToString(dt.Rows[0]["CountryId"]);
            System.Data.SqlClient.SqlParameter[] prm;
            prm = new System.Data.SqlClient.SqlParameter[1];
            prm[0] = new System.Data.SqlClient.SqlParameter("@CountryId", ddlcountry.SelectedValue);
            Utils.GetLookUpData<DropDownList>(ref ddlprovince, LookUps.State, prm);
            prm = null;
            if (ddlprovince.Items.FindByValue(Convert.ToString(dt.Rows[0]["StateId"])) != null)
                ddlprovince.SelectedValue = Convert.ToString(dt.Rows[0]["StateId"]);
            txtfirstName.Focus();
            txtfirstName.Text = "";
            lblZipCode.Text = "";
        }
        else
        {
            txtfirstName.Text = "";
            lblZipCode.Text = ResourceMgr.GetError("* Zipcode does not exist.");
        }
    }

    /**
     * Tarkistaa, onko syöte kokonaisluku ja olemassa.
     */
    protected Boolean IsInteger(String input, TextBox sender)
    {
        if (sender == null)
        {
            return false;
        }

        if (input == null)
        {
            sender.Focus();
            return false;
        }

        int number = 0;
        if (input.Length > 0 && Int32.TryParse(input, out number))
        {
            return true;
        }
        else
        {
            sender.Focus();
            return false;
        }
    }

 public bool IsItInt(TextBox textBox)
 {
     int number = 0;
     if (Int32.TryParse(textBox.Text, out number))
     {
         return true;
     }
     MessageBox.Show("Går inte att konvertera till Int");
     textBox.Focus();
     return false;
 }