本人上班闲着无聊,偶遇些网站仿效Google和百度的搜索,.使搜索的关键字显红色,觉得挺牛的,于是抽了些时间自己弄了一个,供广大asp.net爱好者参考.
首先创建类库 Model (业务实体层),创建类: NewDina.CS 用于获取数据库相应字段名,
Demo如下:
public class NewDina
{
FieldsFields
Public PropertiesPublic Properties
}然后再创建一个类:DinaSet.CS该列用于将搜索的关键字放入数组,用于替换关键字用,令搜索的关键字显红色;
Demo如下:
public class DinaSet { private ArrayList dinarray = new ArrayList(); public ArrayList Dinarray
{ get { return dinarray;
} } }类创建好之后就是界面设计了,
Demo如下:
<html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div> <asp:TextBox ID="txt" runat="server"></asp:TextBox> <asp:Button ID="btnSearch" runat="server" Text="搜 索" onclick="btnSearch_Click" /><br /> <asp:DataList ID="dlData" runat="server" Height="158px" Width="100%"> <HeaderTemplate> <table border="0" cellpadding="0" cellspacing="0" width="100%" style="height:100%"> <tr> <td>标题</td> <td>内容</td> <td>时间</td> </tr> </HeaderTemplate> <ItemTemplate> <tr> <td colspan="3"></td> </tr> <tr> <td style="200px"><%# Eval("news_Title")%></td> <td><%# Eval("news_Content")%></td> <td><%# Eval("news_Time")%></td> </tr> </ItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:DataList> </div> </form></body></html>后台代码如下:
public string keyword_sousuo(string table_field, string keyword) { string str01="", str02="", keyword_Words; string[] keywords, table_fields; table_fields = table_field.Split(','); keywords = keyword.Split(','); if (table_field != "") { str01 = "(" + table_fields[0].ToString() + " like '%" + keyword + "%'" + ")"; for (int i = 0; i < table_fields.Length; i++) { str01 = str01 + " or " + table_fields[i].ToString() + " like '%" + keyword + "%'"; } //str01 = str01 + ")"; } else { Response.Write("<script>alert('参数错误（不能为空）！')</script>"); } keyword = keyword.Replace(" ", " "); keywords = keyword.Split(' '); if (keywords.Length > 0) { for (int i = 0; i < keywords.Length; i++) { str02 = str02 + " or " + table_fields[0].ToString() + " like '%" + keywords[i].ToString() + "%'"; for (int j = 1; j < table_fields.Length; j++) { str02 = str02 + " or " + table_fields[j] + " like '%" + keywords[i].ToString() + "%'"; } //str02 = str02 + ")"; } //str02 = "(" + str02.Replace(")(", ")and(") + ")"; keyword_Words = "(" + str01 +" "+ str02 + ")"; } else { keyword_Words = str01; } return keyword_Words; } public string keyword_tag(string str,string keyword) { string str01, str02; string[] keywords; string keyword_tag = ""; keyword = keyword.Replace(" ", " "); str01 = str.Replace(keyword,"<font color="#ff0000">"+keyword+"</font>"); keywords=keyword.Split(' '); if (keywords.Length > 0) { str02 = str; for (int i = 0; i < keywords.Length; i++) { str02 = str02.Replace(keywords[i], "<font color="#ff0000">" + keywords[i] + "</font>"); } keyword_tag = str02; } else { keyword_tag = str01; } return keyword_tag; } protected void btnSearch_Click(object sender, EventArgs e) { string keyword = txt.Text; string sql_where = keyword_sousuo("news_Title,news_Content,news_Time",keyword); string strconn = "server=;User ID=sa;Password=123456;database=r;"; SqlConnection conn = new SqlConnection(strconn); conn.Open(); string strsql = "select news_Title,news_Content,news_Time from CMgr_NewsDiary where " + sql_where + "order by news_Id"; SqlDataAdapter sda = new SqlDataAdapter(strsql,conn); DataSet ds = new DataSet(); sda.Fill(ds); DataTable dt = ds.Tables[0]; ModelData.DinaSet nds = new ModelData.DinaSet(); foreach(DataRow dr in dt.Rows) { ModelData.NewDina nda = new ModelData.NewDina(); nda.news_Title =keyword_tag( dr["news_Title"].ToString(),txt.Text); nda.news_Content =keyword_tag( dr["news_Content"].ToString(),txt.Text); nda.news_Time =keyword_tag(dr["news_Time"].ToString(),txt.Text); nds.Dinarray.Add(nda); } dlData.DataSource = nds.Dinarray; dlData.DataBind(); conn.Close(); }其中keyword_sousuo(string table_field, string keyword)方法的作用是返回条件查询语句的条件字符.
keyword_tag(string str,string keyword)方法的作用是将返回的结果数据中响应关键字进行替换,令查询的关键字显红色.若霖湛圆