冲突多个正则表达式导致空白区域

Question

对于相同的ID，我必须有两种不同的正则表达式模式。原因是我对所有三个都有不同的错误消息要求。问题是最后一个正则表达式干扰了第二个领先的空间验证。我尝试了\s，^\s，[ \t]，(?! )以及我提出的各种其他难以想象的想法。与上面相同的正则表达式与StreetAddress2冲突并允许前导空格。我试过的修剪没有奏效。除非我注释掉SameAsAbove。

public const string StreetAddress = @"^(?!(SAME|SAME AS ABOVE|same|same as above))[a-zA-Z0-9]{1}[a-zA-Z0-9&-\/.# ]{0,49}";

public const string StreetAddress2 = @"^(?! )[^\s][a-zA-Z0-9]{1}[a-zA-Z0-9&-\/.# ]{0,49}"; 

public const string SameAsAbove = @"^(?!(SAME|SAME AS ABOVE|same|same as above|Same|Same as above|Same as Above)).*$";

前两个给出了信息：

public const string StreetAddress = "Street may contain only alphanumeric characters, ., #, /, -, & or white space";

最后一条给出了这条消息：

public const string SameAsAbove = "Same or Same As Above is not allowed";

<asp:RegularExpressionValidator 
 ID="RegExpDFSRegistrationAddress" 
 ControlToValidate="txtDFSRegistrationAddress"
 runat="server" 
 CssClass="Error" />

RegExpBusinessContactAddress.ValidationExpression = CommonRegularExpressions.StreetAddress2;

RegExpBusinessContactAddress.ErrorMessage = CommonErrorMessages.StreetAddress;