Question

我有串HTML的圖像，例如：

string str = "There is some nice <img alt='img1' src='img/img1.png' /> images in this <img alt='img2' src='img/img2.png' /> string. I would like to ask you <img alt='img3' src='img/img3.png' /> how Can I can I get the Lenght of the string?"; 

我想獲得字符串的lenght沒有圖像和圖像的數量。所以，結果應該是：

int strLenght = 111; 
int imagesCount= 3; 

請問您能告訴我最有效的方法嗎？

感謝

Answer 1

如果你想用正則表達式的幫助，因爲我在評論中提及上面的去做。請使用以下代碼

var regex = new System.Text.RegularExpressions.Regex("<img[^>]*/>"); 
var plainString = regex.Replace(str, ""); 

// plainString.length will be string length without images 
    var cnt = regex.Matches(str).Count; // cnt will be number of images 

Answer 2

我有類似的問題，並且我創建了此方法。 你可以用它來去除HTML標籤和計算你的串

public static string StripHtmlTags(string source) 
{ 
    if (string.IsNullOrEmpty(source)) 
    { 
    return string.Empty; 
    } 

    var array = new char[source.Length]; 
    int arrayIndex = 0; 
    bool inside = false; 
    for (int i = 0; i < source.Length; i++) 
    { 
    char let = source[i]; 
    if (let == '<') 
    { 
     inside = true; 
     continue; 
    } 

    if (let == '>') 
    { 
     inside = false; 
     continue; 
    } 

    if (!inside) 
    { 
     array[arrayIndex] = let; 
     arrayIndex++; 
    } 
    } 

    return new string(array, 0, arrayIndex); 
} 

您的計數會是這樣：

int strLength = StripHtmlTags(str).Count; 

Answer 3

我建議使用一個真正的HTML解析器，例如HtmlAgilityPack。然後，它很簡單：

string html = "There is some nice <img alt='img1' src='img/img1.png' /> images in this <img alt='img2' src='img/img2.png' /> string. I would like to ask you <img alt='img3' src='img/img3.png' /> how Can I can I get the Lenght of the string?"; 

var doc = new HtmlAgilityPack.HtmlDocument(); 
doc.LoadHtml(html); 
int length = doc.DocumentNode.InnerText.Length;    // 114 
int imageCount = doc.DocumentNode.Descendants("img").Count(); // 3 

這是你的樣品中DocumentNode.InnerText回報，你跳過一些空格：

There is some nice images in this string. I would like to ask you how Can I can I get the Lenght of the string? 

Answer 4

添加（COM）引用MSHTML（Microsoft HTML對象LIB）和你可以：

var doc = (IHTMLDocument2)new HTMLDocument(); 
doc.write(str); 

Console.WriteLine("Length: {0}", doc.body.innerText.Length); 
Console.WriteLine("Images: {0}", doc.images.length); 

Answer 5

我喜歡約翰·史密斯的解決方案，但我不得不在最後添加Trim()相匹配的MS Word的結果。

使用此：

return new string(array, 0, arrayIndex).Trim();