.net 网站开发知识点二

net 网站开发知识点一
介绍了Form验证，FCKediter控件的使用，以及分页控件的使用，这章将再介绍几点简单的知识点，掌握这些知识，就可以简单一个简单的新闻发布网站。
一、新闻标题

这样的新闻预览标题可以用reapeter控件实现
 
[html] 
<asp:Repeater ID="Repeater1" runat="server">       
      <ItemTemplate > 
      <table width="550" border="1" cellpadding="0"  style=" border:none"> 
      <tr> 
      <td height="30px" style="border-left-width:0; border-top-width:0; border-right-width:0; border-bottom-width:0 " class="text"><%# Convert.ToDateTime(Eval("NewsTime")).ToShortDateString() %> </td> 
      </tr> 
      <tr> 
      <td  style="border-left-width:0; border-top-width:0; border-right-width:0; border-bottom-width:0 " > 
      <p style=" text-align:justify  ; font-size: 12pt; color: #306; font-family: Arial, Helvetica, sans-serif;font-style: italic; font-weight: bold; width:550px;overflow:hidden"> <%# Eval("NewsTitle") %> </td> 
      </tr> 
       
      <tr> 
      <td  style="border-left-width:0; border-top-width:0; border-right-width:0; border-bottom-width:0 ; padding-top:10px" class="text"> 
      <p style=" text-align:justify  ; width:550px; overflow:hidden "> <%# getchar(Eval("NewsText").ToString(),340)%> </td> 
      </tr> 
 
      <tr> 
      <td height="30px" style="border-left-width:0; border-top-width:0; border-right-width:0; border-bottom-color:#666;" ><br /><a href="NewsView.aspx?id=<%# Eval("id")%>" class="more">More</a></td> 
      </tr> 
      </table> 
      </ItemTemplate> 
</asp:Repeater> 
后台代码如下：
[csharp]
namespace WebAPP 
{ 
    public partial class NewsReleases : System.Web.UI.Page 
    { 
        private NewsManage newsManage = new NewsManage(); 
 
        protected void Page_Load(object sender, EventArgs e) 
        { 
            if (!IsPostBack) 
            {  
              Repeater1.DataSource = newsManage.GetList(); 
              Repeater1.DataBind(); 
            } 
        } 
 
        public string getchar(string str, int len) 
        { 
            str = Regex.Replace(str, @"<[^>]+>", ""); 
            if (str.Length > len) 
                str = str.Substring(0, len); 
            str += "…"; 
            return str; 
        }   
    } 
} 
还有一种标题类型：

这种可以用datalist绑定，也可以用repeater绑定:
[html] 
<p class="productList"> 
       <asp:Repeater ID="Repeater1" runat="server"> 
       <HeaderTemplate> 
           <ul> 
       </HeaderTemplate> 
            <ItemTemplate> 
              <li> 
               <table border="0"> 
               <tr><td valign="middle" ><img src="<%# Eval("imagePath") %>" width="65px" height="75px" style=" margin-right:5px;border:   1px   solid black;" /></td> 
               <td valign="top" height="85px" width="125px" style="font-size:12px; word-spacing:3px; text-align:left"><a href="Media<%# Eval("fileType") %>.aspx?id=<%# Eval("id")%>" target="_blank" class="bottom" > <%# Eval("fileTitle") %></a> 
               <p style=" width:125px"><%# Eval("fileMonth") %>  <%# Eval("fileYear") %></p> 
               </td></tr> 
               </table>           
             </li>   
        </ItemTemplate> 
   <FooterTemplate> 
   </ul>           
   </FooterTemplate> 
       </asp:Repeater> 
       </p>   

Reperter需要设置一定的CSS样式：
[html]
.productList{ 
  border:none; 
  margin:0px; 
  width:630px; 
  } 
   
  .productList ul{ 
  margin:0px; 
  padding:0px; 
  list-style:none; 
   
  } 
   
  .productList li{   
  float:left;  
  padding-right:10px; 
  width:200px; 
  list-style:none; 
  } 

二、后台编辑模块

分页控件在上一章讲过，Gridview绑定数据也很简单，这里要讲一下操作这个模板项
代码如下：
[html] 
<asp:TemplateField HeaderText="操作"> 
           <ItemTemplate> 
           <asp:Button ID="btnView" runat="server" Text="查看详情" ForeColor="#0063DC" CommandName="View" CommandArgument="<%# Container.DisplayIndex %>"   />           
           <asp:Button ID="btnCancel" runat="server" Text="删除" ForeColor="#0063DC" CommandName="Cancel" CommandArgument="<%# Container.DisplayIndex %>"  /> 
           </ItemTemplate> 
               <ItemStyle Width="130px" ForeColor="#0063DC" /> 
           </asp:TemplateField> 

<Container.DisplayIndex>可以确定行号
后台代码：
[csharp] 
namespace WebAPP 
{ 
    public partial class EditNews : System.Web.UI.Page 
    { 
        private NewsManage newsManage = new NewsManage(); 
 
        /// <summary> 
        /// GridView绑定全部数据 
        /// </summary> 
        public void GridViewBind() 
        { 
            txtRowCount.Text = newsManage.ExecuteScalar().ToString(); 
            AspNetPager.RecordCount = newsManage.ExecuteScalar(); 
            int intStart = AspNetPager.PageSize * (AspNetPager.CurrentPageIndex - 1); 
            int intNum = AspNetPager.PageSize; 
            DataGridView.DataSource = newsManage.GetList(intStart, intNum); 
            DataGridView.DataBind(); 
        } 
 
        protected void Page_Load(object sender, EventArgs e) 
        { 
            try 
            { 
                if (!IsPostBack) 
                { 
                    GridViewBind(); 
                } 
            } 
            catch (Exception ex) 
            { throw ex; } 
        } 
 
        protected void DataGridView_RowCommand(object sender, GridViewCommandEventArgs e) 
        { 
            int rowIndex = Convert.ToInt32(e.CommandArgument); 
            int id = Convert.ToInt32(DataGridView.Rows[rowIndex].Cells[0].Text); 
            if (e.CommandName == "Cancel") 
            { 
                try 
                { 
                    newsManage.Delete(id); 
 
                } 
                catch (Exception ex) 
                { throw (ex); } 
            } 
 
            if (e.CommandName == "View") 
            { 
                Response.Redirect("NewsDetail.aspx?id=" + id); 
            }         
        } 
 
        protected void DataGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) 
        { 
            try 
            { 
                DataGridView.EditIndex = -1; 
                GridViewBind(); 
            } 
            catch (Exception ex) 
            { throw ex; } 
        } 
 
        protected void DataGridView_RowDataBound(object sender, GridViewRowEventArgs e) 
        { 
            if (e.Row.RowType == DataControlRowType.DataRow) 
            { 
                ((Button)e.Row.Cells[2].Controls[3]).Attributes.Add("onclick", "javascript:return confirm('你确定要删除此项么？')"); 
            } 
        } 
 
        protected void DropListNumber_TextChanged(object sender, EventArgs e) 
        { 
            try 
            { 
                //选择数据显示行数 
                AspNetPager.PageSize = Convert.ToInt32(DropListNumber.SelectedValue); 
                GridViewBind(); 
            } 
            catch (Exception ex) 
            { throw ex; } 
        } 
 
        protected void AspNetPager_PageChanged(object sender, EventArgs e) 
        { 
            try 
            { 
                GridViewBind(); 
            } 
            catch (Exception ex) 
            { throw ex; } 
        } 
    } 
}