/// <summary>
/// 更新<c>showStr</c>和<c>ShowBox.Text</c>值
/// </summary>
/// <permission cref="showStr">更新该成员的值</permission>
/// <param name="str">要更新的字符串</param>
private void UpdateStrAndBox(string str)
{
ShowBox.Focus();
if (showStr == "0" && str != ".")
{
showStr = str;
}
else
{
showStr += str;
}
ShowBox.Text = showStr;
ShowBox.Select(ShowBox.Text.Length, 0);
ShowBox.ScrollToCaret();
}
/// <summary>
/// 按钮C点击事件
/// </summary>
/// <param name="sender">事件源</param>
/// <param name="e">不包含事件数据的对象</param>
private void Btnc_Click(object sender, EventArgs e)
{
ShowBox.Focus();
if (showStr == string.Empty)
{
ShowBox.Text = "0";
ShowBox.Select(ShowBox.Text.Length, 0);
ShowBox.ScrollToCaret();
return;
}
showStr = showStr.Substring(0, showStr.Length - 1);
if (string.Equals(showStr, string.Empty))
{
showStr = "0";
}
ShowBox.Text = showStr;
ShowBox.Select(ShowBox.Text.Length, 0);
ShowBox.ScrollToCaret();
}
/// <summary>
/// 按钮Enter点击事件
/// </summary>
/// <param name="sender">事件源</param>
/// <param name="e">不包含事件数据的对象</param>
private void Btnenter_Click(object sender, EventArgs e)
{
ShowBox.Focus();
if (showStr.IndexOfAny(new char[] { '+', '-', '*', '/' }) == -1)
{
return;
}
try
{
double result = Calculation.GetCalculation().Result(showStr);
showStr = string.Empty;
ShowBox.Text = result.ToString();
ShowBox.Select(ShowBox.Text.Length, 0);
ShowBox.ScrollToCaret();
}
catch (Exception)
{
return;
}
}