c#-在RichTextBox中插入笑脸会插入一些笑脸,而忽略其他笑脸
我有一个代码将richtextbox中的符号替换为smileys,代码如下:c#-在RichTextBox中插入笑脸会插入一些笑脸,而忽略其他笑脸,c#,image,winforms,clipboard,C#,Image,Winforms,Clipboard,我有一个代码将richtextbox中的符号替换为smileys,代码如下: private void add_smileys(RichTextBox addin) { try { while (addin.Text.Contains(":)")) { addin.SelectionStart = addin.Find(":)",
private void add_smileys(RichTextBox addin)
{
try
{
while (addin.Text.Contains(":)"))
{
addin.SelectionStart = addin.Find(":)", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_smile;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(">:("))
{
addin.SelectionStart = addin.Find(">:(", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 3;
Image img = Resources.in_angry;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":D"))
{
addin.SelectionStart = addin.Find(":D", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_lol;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":'("))
{
addin.SelectionStart = addin.Find(":'(", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 3;
Image img = Resources.in_cry;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":("))
{
addin.SelectionStart = addin.Find(":(", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_sad;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(";)"))
{
addin.SelectionStart = addin.Find(";)", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_wink;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains("xD"))
{
addin.SelectionStart = addin.Find("xD", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_laugh;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":P"))
{
addin.SelectionStart = addin.Find(":P", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_tongue;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":|"))
{
addin.SelectionStart = addin.Find(":|", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_neutral;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains("^^"))
{
addin.SelectionStart = addin.Find("^^", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_happy;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains("o.O"))
{
addin.SelectionStart = addin.Find("o.O", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 3;
Image img = Resources.in_dizzy;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":S"))
{
addin.SelectionStart = addin.Find(":S", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_confused;
Clipboard.SetImage(img);
addin.Paste();
}
while (addin.Text.Contains(":O"))
{
addin.SelectionStart = addin.Find(":O", RichTextBoxFinds.WholeWord);
addin.SelectionLength = 2;
Image img = Resources.in_omg;
Clipboard.SetImage(img);
addin.Paste();
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
这是输出:
如您所见,有些符号被笑脸取代,有些则没有。此外,我还有一个例外:
这个错误的原因是什么?我怎么修理它
我得到这个例外:在这里输入图像描述
这个错误的原因是什么?我该如何修复它
当查找的字符串不存在时,Find
方法返回-1
。此值对于加载项选择Start
无效
在尝试使用该值之前,应首先检查以确保Find
方法的结果大于-1
方法
var selectionStart = addin.Find(":)", RichTextBoxFinds.WholeWord);
if (selectionStart > -1)
{
addin.SelectionStart = selectionStart;
addin.SelectionLength = 2;
}
您的包含和查找检查是多余的。由于某种原因,当您到达“^^”时,它们返回不同的结果,这就是为什么会出现错误。但是要删除冗余,应该在循环中使用Find
方法,而不是Contains
while (true)
{
var selectionStart = addin.Find(":)", RichTextBoxFinds.WholeWord);
if (selectionStart > -1)
{
addin.SelectionStart = selectionStart;
addin.SelectionLength = 2;
}
else
{
break;
}
}
我也认为你的方法不是很干净。您可以使用字典
以更简单、更易于维护的方式进行所有替换。您还应该使用@
符号来转义字符串
private void add_smileys(RichTextBox addin)
{
var smileys = new Dictionary<string, Image>()
{
{ @":)", Resources.in_smile },
{ @">:(", Resources.in_angry },
{ @":D", Resources.in_lol },
{ @":'(", Resources.in_cry },
{ @":(", Resources.in_sad },
{ @";)", Resources.in_wink },
{ @"xD", Resources.in_laugh },
{ @":P", Resources.in_tongue },
{ @":|", Resources.in_neutral },
{ @"^^", Resources.in_happy },
{ @"o.O", Resources.in_dizzy },
{ @":S", Resources.in_confused },
{ @":O", Resources.in_omg },
};
foreach (var smiley in smileys)
{
add_smiley(addin, smiley.Key, smiley.Value);
}
}
private void add_smiley(RichTextBox addin, string token, Image smiley)
{
while (true)
{
var selectionStart = addin.Find(token, RichTextBoxFinds.WholeWord);
if (selectionStart < 0) break;
try
{
addin.SelectionStart = selectionStart;
addin.SelectionLength = token.Length;
Clipboard.SetImage(smiley);
addin.Paste();
}
catch (Exception ex)
{
MessageBox.Show(e.Message);
break;
}
}
}
private void add\u smileys(RichTextBox addin)
{
var smileys=新字典()
{
{@:“,Resources.in_smile},
{@“>:(“,Resources.in_},
{@“:D”,Resources.in_lol},
{@:“(”,Resources.in_cry},
{@:(,Resources.in_sad},
{@“)”,Resources.in_wink},
{@“xD”,参考资料,
{@“:P”,参考资料,
{@:|“,Resources.in_neutral},
{@“^”,Resources.in_happy},
{@“o.o”,参考资料,in_dizzy},
{@“:S”,参考资料,
{@“:O”,参考资料,
};
foreach(smileys中的变量smiley)
{
添加\u smiley(addin,smiley.Key,smiley.Value);
}
}
私有void add_smiley(RichTextBox加载项、字符串标记、图像smiley)
{
while(true)
{
var selectionStart=addin.Find(token,RichTextBoxFinds.WholeWord);
如果(选择开始<0)中断;
尝试
{
addin.SelectionStart=SelectionStart;
addin.SelectionLength=token.Length;
剪贴板.SetImage(smiley);
addin.Paste();
}
捕获(例外情况除外)
{
MessageBox.Show(e.Message);
打破
}
}
}
您似乎对while循环进行了大量冗余检查,为什么不创建一个字符串[]{}
包含所有可能的字符串,然后实现一个while循环和可能的Case语句(如果需要)。乍一看,您可以使用一个while循环来实现这一点,而这个while循环可能不需要,但无论哪种方式,您都应该能够使用switch Case语句来完成相同的操作。您是否已使用ru代码以查看哪个while循环导致了问题..?以及为什么会发生..?@MethodMan显然,“xD”符号的while循环是导致问题的循环,我不知道为什么。我如何创建字符串[]while循环?我的意思是,我必须在addin.Text.Contains()中放入什么方法?无论如何,谢谢你花时间来帮助我:)我要说的是创建一个字符串[]类似这样的var-validChars=new-string[]{:”,“>:(“,…};
”,然后检查是否包含任何字符,然后执行以下操作var-containsChar=validChars.ToList().Contains(“:”);
下面的示例非常简单,可以创建一个字符串[]来检查..@MethodMan,但我希望validChars.ToList().Contains检查所有符号,而不仅仅是“:”)“@QNightOwl888非常好,我认为字典示例是一个很好的选择,也是OPC的一个很好的示例谢谢:)它现在可以工作了!但是,当应用程序解释了很多笑脸时,它会变得非常缓慢,有时会崩溃,对此我能做些什么呢?