给几个在C#中，使用正则表达式取页面下拉菜单(select)中的值示例:
//取html中全部 select 的 name
Regex reg_name = new Regex(@"(?<=<select name=\"").*?(?=\"")");
//取html中全部<select>项的值
Regex reg_select = new Regex("(?is)<select name=*.*?>]*.*?</select>");
//取html中一个 select name 等于"Status"的值
Regex status = new Regex(@"(?is)<select name=\""status\"">]*.*?</select>");
一下是一段完整的代码和方法，取html中一个下拉菜单 select name 等于”Status”的中值，添加到DropDownList中:
string strDoc = （你的html）;
//取html中一个下拉菜单 select name 等于"Status"的中值
Regex status = new Regex(@"(?is)<select name=\""status\"">]*.*?</select>");
MatchCollection mc_status = status.Matches(strDoc);
getSelectOptions(mc_status, cmbStatus);
/// <summary>
/// 取select对列表复制
/// </summary>
/// <param name="selected"></param>
/// <param name="cmb"></param>
void getSelectOptions(MatchCollection selected, ComboBox cmb)
{
if (selected.Count < 1)
return;
txtValues.Text = "";
txtValues.Text = selected[0].Value.Replace("</option>", Environment.NewLine);
string tmpTxt = "";
foreach (string s in txtValues.Lines)
{
if (s == "")
continue;
string a = "";
a = s.Replace("\"", "").Replace("<option value=\"", "");
int x = a.LastIndexOf(">");
tmpTxt += a.Substring(x + 1) + Environment.NewLine;
}
txtValues.Text = tmpTxt.Trim();
cmb.Items.Clear();
cmb.Items.AddRange(txtValues.Lines);
cmb.SelectedIndex = 0;
cmb.Size = cmb.PreferredSize;
}
推荐一个正则表达式测试/验证工具 – http://bohu.net/blog/8814
