Question

如何使以下异常返回BOLD和文本字体RED？ “返回” WMI错误 “;”

的措辞

稍后在代码中使用它来返回文本框中的WMI参数...如下所示：

 private static string GetMOValue(ManagementObject mo, string name)
        {
            try
            {
                object result = mo[name];
                return result == null ? "" : result.ToString();
            }
            catch (Exception)
            {
                return "***WMI Error***";
            }
        }

        private void cmbHdd_SelectedIndexChanged(object sender, EventArgs e)
        {
            //try
            //{
                ManagementObjectSearcher mosDisks = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive WHERE Model = '" + cmbHdd.SelectedItem + "'");
                foreach (ManagementObject moDisk in mosDisks.Get())
                {
                    //try
                    //{
                    txtSystemName.Text = GetMOValue(moDisk, "systemname");
                    txtType.Text = GetMOValue(moDisk, "MediaType");
                    txtModel.Text = GetMOValue(moDisk, "Model");
                    txtFirmware.Text = GetMOValue(moDisk, "FirmwareRevision");
.....

Answer 1

TextBox不是网络浏览器。它支持使用单一字体显示文本 - 没有装饰，颜色等。您可以在运行时更改文本框的字体。

您可以处理文本框的TextChanged事件来实现此目的，但这不是一个很好的代码示例：

private void textBox1_TextChanged(object sender, EventArgs e)
{
  Font defaultFont = SystemFonts.DefaultFont;

  if(textBox1.Text.StartsWith("**") && textBox1.Text.EndsWith("**"))
  {
    textBox1.Font = new Font(defaultFont.FontFamily, defaultFont.Size, FontStyle.Bold);
    textBox1.ForeColor = Color.Red;
    // note: can't change text here as it will recursively trigger this handler
  }
  else
  {
    textBox1.Font = defaultFont;
    textBox1.ForeColor = SystemColors.ControlText;
  }
}

更好的方法是使用一个简单的方法来设置文本和文本框属性。

肥皂盒：请注意我考虑这种形式检查**字符的文本，看它是否是一个错误，非常丑陋和不可靠。你应该做的是像

Font defaultFont = SystemFonts.DefaultFont;
try
{ 
   textBox1.Text = GetMOValue(...);
   textBox1.Font = defaultFont;
   textBox1.ForeColor = SystemColors.ControlText;
}
catch(Exception ex)
{ 
   textBox1.Text = "ERROR";
   textBox1.Font = new Font(defaultFont.FontFamily, defaultFont.Size, FontStyle.Bold);
   textBox1.ForeColor = Color.Red;
}
// the Font and ForeColor properties are repeatedly set in case that previous
// try had the different result (e.g. previous => error, current => OK, so 
// we need to reset the attributes of textbox

您可以使用RichTextBox，WebBrowser或某些自定义绘制控件来支持更高级的格式化。

Answer 2

您应该检查方法是否返回异常，如果是，则动态更改文本框的设置字体和颜色：

textBox.ForeColor = Color.Red;    
textBox.Font = new Font(textBox.Font, FontStyle.Bold);

Answer 3

    private void btnBold_Click(object sender, EventArgs e)
    {
        this.rtxText.SelectionFont = new System.Drawing.Font(rtxText.Font.FontFamily,Convert.ToInt16(nudFontSize.Value), System.Drawing.FontStyle.Bold ^ this.rtxText.SelectionFont.Style);
    }

    //ITALICS CODING
    private void btnItalics_Click(object sender, EventArgs e)
    {
        this.rtxText.SelectionFont = new System.Drawing.Font(rtxText.Font.FontFamily, Convert.ToInt16(nudFontSize.Value), System.Drawing.FontStyle.Italic ^ this.rtxText.SelectionFont.Style);
    }

    //UNDERLINE CODING
    private void btnUnderline_Click(object sender, EventArgs e)
    {
        this.rtxText.SelectionFont = new System.Drawing.Font(rtxText.Font.FontFamily, Convert.ToInt16(nudFontSize.Value), System.Drawing.FontStyle.Underline ^ this.rtxText.SelectionFont.Style);
    }

如何使文字BOLD和红色

3 个答案: