相关代码如下：
protected void Page_Load(object sender, EventArgs e)
{
DataTable table = new DataTable();
DataColumn c1 = new DataColumn("订单编号", typeof(string));
table.Columns.Add(c1);
DataColumn c2 = new DataColumn("买家昵称", typeof(string));
table.Columns.Add(c2);
DataColumn c3 = new DataColumn("卖家昵称", typeof(string));
table.Columns.Add(c3);
DataColumn c4 = new DataColumn("订单状态", typeof(string));
table.Columns.Add(c4);
DataColumn c5 = new DataColumn("商品标题", typeof(string));
table.Columns.Add(c5);
DataColumn c6 = new DataColumn("价格", typeof(string));
table.Columns.Add(c6);
ViewState["dt"] = table;
}
按钮单击部分代码：
string[,] trades = null;
trades = new string[40, 7];
int i = 0;
foreach (XmlNode node in nodeLst)
{
// Response.Write(node.SelectSingleNode("iid").InnerText);
trades[i, 0] = node.SelectSingleNode("iid").InnerText;
trades[i, 1] = node.SelectSingleNode("title").InnerText;
trades[i, 2] = node.SelectSingleNode("pic_url").InnerText;
trades[i, 3] = node.SelectSingleNode("price").InnerText;
trades[i, 4] = node.SelectSingleNode("click_url").InnerText;
trades[i, 5] = node.SelectSingleNode("nick").InnerText;
i++;
}
int c = trades.GetLength(0);
DataTable mydt = (DataTable)ViewState["dt"];
for (i = 0; i < c; i++)
{
DataRow r1 = mydt.NewRow();
r1["订单编号"] = trades[i, 0];
r1["买家昵称"] = trades[i, 1];
r1["卖家昵称"] = trades[i, 2];
r1["订单状态"] = trades[i, 3];
r1["商品标题"] = trades[i, 4];
r1["价格"] = trades[i, 5];
mydt.Rows.Add(r1);
mydt.AcceptChanges();
}
this.GridView1.DataSource = mydt;
GridView1.DataBind();
按钮的前面部分是获取的一个XML，我想获取到XML后再加入到这个GridView里，但是现在的情况是覆盖了之前的数据。
不知道如何实现不覆盖，或者我这个代码有哪些问题，请赐教，谢谢！
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gx
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接分中。。
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if(!isPostBack)
{
}
使用mshtml和正则解析html
或XPath
string tag = @"(?:[\w-:]+)";
string attribute = @"(?:[\w-:]+)(?:=(?:[^\s\>\<]*|\""[\s\S]*?\""|\'[\s\S]*?\'))?";
string name = @"(?:[\w-:]+)";
string xmlDirective = @"(?:\<!" +name + @"(?:\s+" +argument + @")*\s*\>)";
string xmlCData = @"(?:\<!\[CDATA\[(?:[\s\S]*?)\]\]\>)";
参考
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- C# code
using System; 2using System.Collections.Generic; 3using System.Text; 4using System.Text.RegularExpressions; 5using MIL.Html; 6 7namespace Yuanso.Sitework.Crawler 8{ 9 public class HtmlUtil 10 { 11 /**//// <summary> 12 /// Written: [CHINA] Zhang Liu 13 /// Date: 1,Jun,2006 14 /// Version: 1.0 15 /// Support: MYBASK <see cref="http://www.mybask.net"/> 16 /// Looking for latest version or similar implementation of this function, please visit: <seealso cref="http://www.mybask.net"/> 17 /// Summary: 18 /// Picking up text content from a html document. This function will remove: 19 /// 1. <%=%> 20 /// 2. script 21 /// 3. style 22 /// 4. html tags 23 /// 6. and others 24 /// 7. html comments 25 /// After all above removed, \r\n will be replaced by an empty character. 26 /// </summary> 27 /// <param name="strHtml">string:Waiting for striping html,javascript, style elements</param> 28 /// <returns>string: Stripped text</returns> 29 public static string ExtractContent(string strHtml) 30 { 31 //All the regular expression for matching html, javascript, style elements and others. 32 string[] aryRegex ={@"<%=[\w\W]*?%>", @"<script[\w\W]*?</script>", @"<style[\w\W]*?</style>", @"<[/]?[\w\W]*?>", @"([\r\n])[\s]+", 33 @"&(nbsp|#160);", @"&(iexcl|#161);", @"&(cent|#162);", @"&(pound|#163);", @"&(copy|#169);", 34 @"&#(\d+);", @"-->", @"<!--.*\n"}; 35 //Corresponding replacment to the regular expressions. 36 //string[] aryReplacment = { "", "", "", "", "", " ", "\xa1", "\xa2", "\xa3", "\xa9", "", "\r\n", "" }; 37 string[] aryReplacment = { "", "", "", "", "", " ", "", "", "", "", "", "", "" }; 38 string strStripped = strHtml; 39 //Loop to replacing. 40 for (int i = 0; i < aryRegex.Length; i++) 41 { 42 Regex regex = new Regex(aryRegex[i], RegexOptions.IgnoreCase); 43 strStripped = regex.Replace(strStripped, aryReplacment[i]); 44 } 45 //Replace "\r\n" to an empty character. 46 strStripped.Replace("\r\n", ""); 47 strStripped.Replace("\t", ""); 48 //Return stripped string. 49 return strStripped; 50 } 51 public static string ExtractTitle(string strHtml) 52 { 53 54 string title; 55 //string titleResult; 56 Match m; 57 string titlePatern = @"<title[^>]*?>.*?</title>"; 58 Regex regex = new Regex(titlePatern, RegexOptions.IgnoreCase); 59 m = regex.Match(strHtml); 60 if (m.Success) 61 { 62 title = m.Value.ToString(); 63 title = title.Replace("<title>", ""); 64 title = title.Replace("</title>", ""); 65 } 66 else title = "无标题"; 67 68 return title; 69 } 70 /**//// <summary> 71 /// 此私有方法从一段HTML文本中提取出一定字数的纯文本 72 /// </summary> 73 /// <param name="instr">HTML代码</param> 74 /// <param name="firstN">提取从头数多少个字</param> 75 /// <param name="withLink">是否要链接里面的字</param> 76 /// <returns>纯文本</returns> 77 public static string getFirstNchar(string instr, int firstN, bool withLink) 78 { 79 string strStripped; 80 strStripped = instr.Clone() as string; 81 strStripped = new Regex(@"(?m)<script[^>]*>(\w|\W)*?</script[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(strStripped, ""); 82 strStripped = new Regex(@"(?m)<style[^>]*>(\w|\W)*?</style[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(strStripped, ""); 83 strStripped = new Regex(@"(?m)<select[^>]*>(\w|\W)*?</select[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(strStripped, ""); 84 if (!withLink) strStripped = new Regex(@"(?m)<a[^>]*>(\w|\W)*?</a[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(strStripped, ""); 85 Regex objReg = new System.Text.RegularExpressions.Regex("(<[^>]+?>)| ", RegexOptions.Multiline | RegexOptions.IgnoreCase); 86 strStripped = objReg.Replace(strStripped, ""); 87 Regex objReg2 = new System.Text.RegularExpressions.Regex("(\\s)+", RegexOptions.Multiline | RegexOptions.IgnoreCase); 88 strStripped = objReg2.Replace(strStripped, " "); 89 //return strStripped.Length > firstN ? strStripped.Substring(0, firstN) : strStripped; 90 return strStripped; 91 } 92 93 public static string getTitle(string strHtml) 94 { 95 string title=""; 96 Regex reg = new Regex(@"(?m)<title[^>]*>(?<title>(?:\w|\W)*?)</title[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase); 97 Match mc = reg.Match(strHtml); 98 if (mc.Success) 99 title = mc.Groups["title"].Value.Trim();100101 return title;102 }103 }104 public class Htmlpage105 {106 public static string GetTitle(string strHtml)107 {108 MIL.Html.HtmlDocument documnet;109 HtmlParser parser = new HtmlDomainTreeParser();110 documnet = parser.Parse(strHtml);111 StringBuilder text = new StringBuilder("");112 foreach (HtmlNode node in documnet.Nodes.FindAllText(true))113 {114115 HtmlText textNode;116 textNode = (HtmlText)node;117 if (!textNode.Text.Contains("\r") && !textNode.Text.Contains("\n"))118 {119 text.Append(textNode.Text);120 break;121 }122 123 }124 return text.ToString();125126 }127 public static string GetContent(string strHtml)128 {129 MIL.Html.HtmlDocument documnet;130 HtmlParser parser = new HtmlDomainTreeParser();131 documnet = parser.Parse(strHtml);132 StringBuilder text = new StringBuilder();133 foreach (HtmlNode node in documnet.Nodes.FindAllText(true))134 {135136 HtmlText textNode;137 textNode = (HtmlText)node;138 if (textNode.Text.Contains("\r") || textNode.Text.Contains("\n"))139 continue;140 else text.Append(textNode.Text);141142 }143 return text.ToString();144145 }146 }147148}149