1清除缓存管用的方法，base类。(好像这样比较管用)
Context.Response.Cache.SetCacheability(HttpCacheability.NoCache);2int.TryParse的好处
private string _zip;
public string Zip
{
get
{
return _zip;
}
set
{
int res;
if (int.TryParse(value, out res))
{
if (res > 99999)
{
throw new ArgumentException("Zip Code Value invalid");
}
else
{
_zip = res.ToString().PadLeft(5, ‘0′);
}
}
else
{
throw new ArgumentException("Zip code must be numeric");
}
}
}
/// <summary>
/// 将相对路径转换为绝对路径
/// 注：最终得到任何场合都可以正常链接的路径（不论将应用程序设置成虚拟目录还是网站的根目录）
/// 例如：设置为虚拟目录的时候，"admin/upload/test.jpg" => "/JCDWeb/admin/upload/test.jpg"
/// 设置为网站根的时候，"admin/upload/test.jpg" => "/admin/upload/test.jpg"
/// </summary>
/// <param name="path">从根开始的相对路径</param>
/// <returns>绝对路径</returns>
public string GetAbsolutePath(string path)
{
// 如果是一个绝对路径直接返回
if (path.ToLower().StartsWith("http://"))
{
return path;
}
// 去掉前导的 "/"
if (path.StartsWith("/"))
{
path = path.Substring(1);
}
// 整个应用程序的路径
string appPath = "http://" + HttpContext.Current.Request.Url.Authority + HttpContext.Current.Request.ApplicationPath;
// 得到绝对路径
if (appPath.EndsWith("/"))
return appPath + path;
else
return appPath + "/" + path;
}
foreach (ListItem li in DropDownList_TypeName.Items)
{
if (li.Value == dt.Rows[0]["TypeID"].ToString().Trim())
{
li.Selected = true;
break;
}
}
7
上传图片显示预览（针对ie7上传不能显示图片问题，增加滤镜）<div id="div_1" class="preview">
<asp:Image ID="img_Photo" runat="server" ImageUrl="../images/noimage.gif"
Width="120px" Height="90px" /></div>
function PreviewInInternetExplorer7(file)
{
if (document.all)
{
$('div_1').filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = file;
$('img_Photo').style.display = "none";
} else
{
$('img_Photo').src = file;
}
}
.preview
{
width:120px;
height:90px;
overflow:hidden;
text-align:center;
border:1px solid #DBDBDB;
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale');
}
public string GetSafeQueryStr(string _name)
{
string str = "";
if (_name != "" && _name != null && Request[_name] != "" && Request[_name] != null)
str = Request[_name].ToString().Trim().Replace("'", "''");
return str;
}
<asp:LinkButton ID="lbt_delete" CommandArgument=' <%#DataBinder.Eval(Container.DataItem,"ID") %> '
runat="server" CommandName="delete" OnClientClick="return confirm('确定删除吗？')">删除</asp:LinkButton>
一：Label lb = e.Item.FindControl("TypeID") as Label;
int typeId = int.Parse (lb.Text.Trim());
switch (e.CommandName)
二：int Id = Convert.ToInt32(e.CommandArgument);
switch (e.CommandName)
private static Database reader;
private static Database writer;
private static object lockObj = new object();
/// <summary>
/// 获得只读数据库实例
/// </summary>
public static Database Reader
{
get
{
if (reader == null)
{
lock (lockObj)
{
if (reader == null)
{
reader = DatabaseFactory.CreateDatabase("Reader");
}
}
}
return reader;
}
}
/// <summary>
/// 获得可写数据库实例
/// </summary>
public static Database Writer
{
get
{
if (writer == null)
{
lock (lockObj)
{
if (writer == null)
{
writer = DatabaseFactory.CreateDatabase("Writer");
}
}
}
return writer;
}
}
11
分页存储过程关键代码。IF @curpage = 0
SET @cmd = 'SELECT TOP '+cast(@page_record AS NVARCHAR)+' '+@fieldlist+'
FROM '+@tablename+' WHERE '+@where+' '+@orderby
ELSE
SET @cmd = 'SELECT TOP '+cast(@page_record AS NVARCHAR)+' '+@fieldlist+'
FROM '+@tablename+' WHERE '+@where+' AND '+@tablefield+'
'+@op+' (SELECT '+@max_min+'('+@tablefield+') FROM (SELECT TOP
'+cast(@uprecord AS NVARCHAR)+' '+@tablefield+' FROM '+@tablename+' WHERE
'+@where+' '+@orderby+') AS TmpTbl ) AND '+@where+' '+@orderby
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