Question

我有以下代码检查SQL中的特定列，并确定它是图像还是文档工作正常。该代码中的列是Addon10。但是，我想扩展一下它将检查列中是否有多个图像。

目前，图像存储如下：

<img src="/images/pt1.png" style="width: 100%;">
<img src="/images/pt2.png" style="width: 100%;">
<img src="/images/pt3.png" style="width: 100%;">
<img src="/images/pt4.png" style="width: 100%;">

任何帮助都将不胜感激。

<%
if (!string.IsNullOrEmpty("Addon10")){
    string grabExt = "Addon10".Substring("Addon10".LastIndexOf(".") + 1).ToLower().Remove(3);
    if (grabExt == "png" || grabExt == "jpg" || grabExt == "jpeg" || grabExt == "tif" || grabExt == "tiff" || grabExt == "gif" || grabExt == "bmp")
         Response.Write("<div style='page-break-before:always'>" + "Addon10" + "</div>");
    else{
       if (grabExt == "txt" || grabExt == "docx" || grabExt =="doc" || grabExt == "pdf" || grabExt== "rtf" || grabExt == ".xls" || grabExt == ".xlr" || grabExt == ".xlsx" || grabExt == "ods" || grabExt == "asp" || grabExt == "aspx")
         Response.Write("<div style='page-break-before:always'>" + "Addon10" + "</div>");
    }
}
%>

@Brad我做了以下事情：

<% string fileListString = "Addon10"; 
fileListString = fileListString.Replace("<img src=", ">|<img src="); 
string[] arrTest = fileListString.Split('|');
   foreach (string s in arrTest)
   {
     if (!string.IsNullOrEmpty("Addon10")){
        string grabExt = "Addon10".Substring("Addon10".LastIndexOf(".") + 1).ToLower().Remove(3);
        if (grabExt == "png" || grabExt == "jpg" || grabExt == "jpeg" || grabExt == "tif" || grabExt == "tiff" || grabExt == "gif" || grabExt == "bmp")
           Response.Write("<div style='page-break-before:always'>" + "Addon10" + "</div>");
     else{
       if (grabExt == "txt" || grabExt == "docx" || grabExt =="doc" || grabExt == "pdf" || grabExt== "rtf" || grabExt == ".xls" || grabExt == ".xlr" || grabExt == ".xlsx" || grabExt == "ods" || grabExt == "asp" || grabExt == "aspx")
             Response.Write("<div style='page-break-before:always'>" + "Addon10" + "</div>");
    }
  }
}
%>

Answer 1

注意：我知道这不是最好的解决方案！它可以给你一个想法。（最好的解决方案是不存储表中的数据，而是将每个图像/链接存储为自己的记录）。

它可能有效，但可能根本不起作用，具体取决于您的数据是否一致，但它在以下示例中有效。

// NOTE:  in my string for testing there are double quotes in there and those are for escape characters.
// populate your string of files into a string variable
            string fileListString = @"<img src=/""/images/pt1.png/"" style=/""width: 100%;/""><img src=/""/images/pt2.png/"" style=/""width: 100%;/""><img src=/""/images/pt3.png/"" style=/""width: 100%;/""><img src=/""/images/pt4.png/"" style=/""width: 100%;/"">";

            // replace the closing HTML tag and Opening of the next img tag with a pipe (or you can change this to use a different delimiter
            fileListString = fileListString.Replace("><img src=", ">|<img src=");

            // then split the string on the pipe delimiter
            string[] arrTest = fileListString.Split('|');

            // then loop through each option
            foreach (string s in arrTest)
            {
                // do your IF logic here
            }

Answer 2

您可以使用正则表达式测试列中标记中的多个图像：

var imageExtensions = new[] {   "png",  "jpg",  "jpeg",  "tif",  "tiff",  "gif",  "bmp" };
var imageExtPattern = String.Join("|", imageExtensions);
var multiImagePattern = $"(^<img src=\"[^.]+\\.(?:{imageExtPattern})\".*>$)+";

var hasMultiImages = Regex.IsMatch(Addon10, multiImagePattern, RegexOptions.Multiline);

检查多个网址的路径扩展名

2 个答案: