判断一个字符串是否是数字

概述public bool IsNum(string Str){string Rx = @"^[1-9]d*$";if (Regex.IsMatch(Str, Rx)){return true;}else{return false;}} 

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          IsNum(        </span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;string</span> Rx = <span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #800000;"&gt;@"</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #800000;"&gt;^[1-9]\d*$</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #800000;"&gt;"</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #000000;"&gt;;        </span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;if</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #000000;"&gt; (Regex.IsMatch(Str,Rx))        {            </span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;return</span> <span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;true</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #000000;"&gt;;        }        </span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;else</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #000000;"&gt;        {            </span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;return</span> <span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #0000ff;"&gt;false</span><span https://m.jb51.cc/tag/color/" target="_blank" >color</a>: #000000;"&gt;;        }    }</span></pre>

 

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