asp.net 的一些积累
1。在gridview里面选中删除一行。
在GridView中添加一个模板列：LinkButton.设置CommandName="Delete"，OnClientClick="return confirm('确认要删除吗？');"
Html代码如下：
<asp:TemplateFieldHeaderText="删除">
<ItemTemplate>
<asp:LinkButtonID="LinkButton1"runat="server" CommandName="Delete"OnClientClick="returnconfirm('确认要删除吗？');">删除</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
然后把删除代码写在RowDeleting事件中：
protectedvoidGridView1_RowDeleting(objectsender,GridViewDeleteEventArgse)
{
intj=Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
addb.DeleteADType(j);
GridView1.DataSource=addb.GetAdType().Tables[0];
GridView1.DataBind();
}
2.连接数据库：
SqlConnection sqlconn = new SqlConnection(ConfigurationSettings.AppSettings["connStringSelina"]);
3。datalist中的数据绑定.
<tr><td>留言人:<%# DataBinder.Eval(Container.DataItem,"Inputer")%></td></tr>
<tr><td>留言时间:<%# DataBinder.Eval(Container.DataItem,"CreateTime")%></td></tr>
4.datalist中的传值绑定。
<a href="LMsg.aspx?ID=<%#DataBinder.Eval(Container.DataItem,"MId") %>">回复留言</a>
5.页面之间传值：
string url;
url = "AddCardOK.aspx?OpenName=" + TxtOpenName.Text + "&kaihao=" + Txtcard.Text + "&cardType=" + DrLType.SelectedValue.ToString() + "&UsePid=" + TxtPid.Text + "×=" + Txt_time.Value.ToString() + "&CardInperson=" + TxtInName.Text + "&IsOpen=" + DropDownList1.SelectedValue.ToString();
Response.Redirect(url);
B页面中：label.text=request.querystring["变量名"]
6. 给一个提示：
Response.Write("<script>alert('修改成功!'); </script>");
7.让gridview 一行不可见;
e.Row.Cells[5].Attributes.Add("style", "display:none");
8.显示客户端IP地址
this.Label1.Text = "客户端IP地址"+Request.UserHostAddress;
9.调用用户控件
<%@ Register TagPrefix="uc1" TagName="Header1" Src="~/Controls/top.ascx" %>
10．调用CSS
<head runat="server">
<title>论坛</title>
<link href="../CSS/Normal.css" type="text/css" rel="stylesheet" />
</head>
11执行存储过程
SqlConnection con = new SqlConnection(DB.GetConStr());
con.Open();
SqlCommand com = new SqlCommand("存储过程名称",con);
com.CommandType = CommandType.StoredProcedure;
SqlParameter sp = new SqlParameter("存储过程参数",SqlDbType.VarChar,50);
sp.Value = userName.Text;
com.Parameters.Add(sp);
com.ExecuteNonQuery();
12.不成功，反加上一个步骤：
if (count > 0)
{
Response.Write("<script> alert('该用户名
已存在！);location='javascript:history.go(-1)'</script>");
}
13．鼠标放到上面变色。 双击打开页面。 点击删除一行.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E0E0E0';this.style.color='buttontext';this.style.cursor='default';");
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#EFF3FB'");
e.Row.Attributes.Add("ondblclick", "window.open('a.aspx?id=" + e.Row.Cells[1].Text + "')"); //双击打开页面
((LinkButton)e.Row.Cells[0].Controls[0]).Attributes.Add("onclick", "return confirm('确定删除?')");
}
}
14.判断用户类型，查询所需的用户：
public DataSet GetUserList(string GetType)
{
string selectString;
selectString = "select u.UserID,u.UserName,u.UserEmail,u.TrueName,u.RegDate,u.LoginNum,u.LastLogin,t.Type from bbc_user as u inner join bbc_user_type as t on u.UserClass=t.ID";
switch (GetType)
{
case null:
selectString += "";
break;
case "commonuser":
selectString += " where u.UserClass=1";
break;
case "gmuser":
selectString += " where u.UserClass=2";
break;
case "CXTuser":
selectString += " where u.UserClass=3";
break;
case "Login24h":
selectString += " where u.LastLogin > '" + DateTime.Now.AddDays(-1).ToString() + "'";
break;
case "Reg24h":
selectString += " where u.RegDate >'" + DateTime.Now.AddDays(-1).ToString() + "'";
break;
case "LockUser":
selectString += " where u.LockUser=1";
break;
}
selectString += " Order By u.UserID DESC";
db.DBOpen();
DataSet ds = db.FillDataSet(selectString);
db.DBClose();
return ds;
}
15．Gridview 里自定义分页：
<PagerSettings FirstPageText="首页" LastPageText="末页" Mode="NextPreviousFirstLast"
NextPageText="下一页" PreviousPageText="上一页" />
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
this.GridView1.DataBind();
}
16．Gridview里设定他的的样式：
<PagerStyle BackColor="#B12B00" HorizontalAlign="Center" ForeColor="White" />
<FooterStyle BackColor="#F43F00" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#FFF0EA" />
<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#F43F00" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#7C6F57" />
<AlternatingRowStyle BackColor="White" />
17．GridView基本的操作编辑更新取消
publicpartialclassGridView_GridView_DeleteUpdate1:System.Web.UI.Page
{
Practice.DAL.authorsauthorsbll=newPractice.DAL.authors();
protectedvoidPage_Load(objectsender,EventArgse)
{
if(!IsPostBack)
{
DataBindGridView();
}
GridView1.RowDeleting+=newGridViewDeleteEventHandler(GridView1_RowDeleting);
GridView1.RowEditing+=newGridViewEditEventHandler(GridView1_RowEditing);
GridView1.RowCancelingEdit+=newGridViewCancelEditEventHandler(GridView1_RowCancelingEdit);
GridView1.RowUpdating+=newGridViewUpdateEventHandler(GridView1_RowUpdating);
}
///<summary>
///功能：GridView删除事件
///作 者：PUKE
///完成时间：2007-05-18
///版 权：[email protected]
///</summary>
///<paramname="sender"></param>
///<paramname="e"></param>
voidGridView1_RowDeleting(objectsender,GridViewDeleteEventArgse)
{
stringid=GridView1.Rows[e.RowIndex].Cells[0].Text.Trim();
authorsbll.Delete(id);//删除，函数自己写
DataBindGridView();//重新绑定数据源
}
///<summary>
///功能：GridView编辑事件
///作 者：PUKE
///完成时间：2007-05-18
///版 权：[email protected]
///</summary>
///<paramname="sender"></param>
///<paramname="e"></param>
voidGridView1_RowEditing(objectsender,GridViewEditEventArgse)
{
GridView1.EditIndex=e.NewEditIndex;
DataBindGridView();
}
///<summary>
///功能：GridView取消事件
///作 者：PUKE
///完成时间：2007-05-18
///版 权：[email protected]
///</summary>
///<paramname="sender"></param>
///<paramname="e"></param>
voidGridView1_RowCancelingEdit(objectsender,GridViewCancelEditEventArgse)
{
GridView1.EditIndex=-1;
DataBindGridView();
}
///<summary>
///功能：GridView更新事件
///作 者：PUKE
///完成时间：2007-05-18
///版 权：[email protected]
///</summary>
///<paramname="sender"></param>
///<paramname="e"></param>
voidGridView1_RowUpdating(objectsender,GridViewUpdateEventArgse)
{
stringaa=(((TextBox)(GridView1.Rows[e.RowIndex].Cells[0].Controls[0])).Text.ToString().Trim());
GridView1.EditIndex=-1;
DataBindGridView();
}
///<summary>
///功能：绑定GridView
///作 者：PUKE
///完成时间：2007-05-18
///版 权：[email protected]
///</summary>
privatevoidDataBindGridView()
{
DataSetds=authorsbll.GetList("");
GridView1.DataSource=ds;
GridView1.DataBind();
}
}
18.判断ＤataSet 里的记录集是否为空
if (myDataSet == null || myDataSet.Tables[0].Rows.Count == 0)
{
//为空时进行处理
}
else
{
//不为空时处理
}
19.选中日期：
protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
Response.Write(string.Format("选中的日期为{0}",Calendar1.SelectedDates[0].ToString("yyyy-MM-dd")));
}
20. Literal和Label到底有什么区别,
其实它们也只有一个区别,就是在转换成客户端Html代码后,Label就成了<span></span>,而Literal则是什么标记都不带
21.新建VS2005的调式根目录
1.工具---> 外部工具----->添加
2.命令:C:"WINDOWS"Microsoft.NET"Framework"v2.0.50727"WebDev.WebServer.EXE
3.参数:/port:8080 /path:$(ProjectDir):
22.{0} {1} 等来接收参数.
public void UpdateAdminLoginLog(string FromIp, int AdminId)
{
db.DBOpen();
string strSQL = string.Format("update bbc_admin set LastLogin='{0}' , LastLoginIP='{1}' , loginnum=loginnum+1 where adminID={2}", DateTime.Now, FromIp, AdminId);
db.Execute(strSQL);
db.DBClose();
}
23.信息存入cookies
HttpCookie cookie = new HttpCookie["名称"];
cookie.Values.Add("webmaster","飞刀");
cookie.Values.Add("writer","beige");
cookie.Values.Add("LinkColor","blue");
24.读取cookies:
HttpCookie cookie = Request.Cookies["名称"];
value1 = cookies.Values["webmaster"];
value2 = cookies.Values["writer"];
25. 上传图片
protected void btnUpload_Click(object sender, EventArgs e)
{
//上传文件
if (IsPostBack)
{
Boolean fileOK = false;
String Path = Server.MapPath("~/UploadFiles/");
String fileExtension = null;
if (FileUpload1.HasFile)
{
fileExtension = System.IO.Path .GetExtension(FileUpload1.FileName).ToLower();
String[] allowExtension = { ".jpg", ".jpeg", ".gif", ".png" };
for (int i = 0; i < allowExtension.Length; i++)
{
if (fileExtension == allowExtension[i])
{
fileOK = true;
}
}
}
if (fileOK)
{
try
{
String newfilename = Path + new PubFun().CreateRandomString() + fileExtension;
FileUpload1.PostedFile.SaveAs(newfilename);
tbphoto.Text = "/UploadFiles/" + newfilename.Replace(Path, null);
}
catch (Exception ex)
{
tbphoto.Text = "文件上传出现错误，请检查重试";
Response.Write(ex);
}
}
else
{
tbphoto.Text = "此类文件不允许上传";
}
}
}
26 request.params
request.params其实是一个集合，它依次包括request.querystring、request.form、request.cookies和request.servervariables
26.ViewState
简而言之,ViewState是保存跨页面生命周期有关变量的最好容器,但它又不能够跨出页面范围真正符合其名称用来保存View的State的。例如有GridA和GridB两个页面，点击一个条目查看明细都回转到Details页面，同时Details页面要提供返回原来页面的途径
27. DataFormatString="{0:格式字符串}"
28.巧妙的利用sql语句
select MID,case when MType='1' then '咨询' when MType='2' then '建议' else '投诉' end as MType,Inputer,Title,MContent,IsChecked,CreateTime,case when status='1' then '处理中...' when status='0' then '未处理' else '已处理' end as statusfrom UMsg order by CreateTime ASC
28. 角本
<script language="javascript" type="text/javascript">
oldDiv=null;
function DivState(DivID){
if(oldDiv!=null){
oldDiv.style.display='none';
}
var IDiv=document.getElementById("Div"+DivID);
IDiv.style.display='';
readed (DivID);
DivOld("Div"+DivID);
top.leftFrame.location.reload();
}
function DivOld(oldID){
oldDiv=document.getElementById(oldID);
}
function readed (ID){ //返回问题
var ajax=new AJAXRequest;
var d = new Date();
ajax.post(
"sysreaded.aspx?d="+d.getTime(),
"NID="+ID,
function(obj) {return obj.responseText;}
);
}
</script>
29. 刷新:
Response.Write("<script language=javascript>window.location.href=window.location.href;</script>");
30.单链接!
NavigateUrl ='<%# DataBinder.Eval(Container.DataItem,"GoodsID","productInfo.aspx?action={0})%>'/>
30. 捕获异常.并输出:
catch(Exception ex)
{
HttpContext.Current.Response.Write(ex.Message);
31. 安装asp.net2.0框架
C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/aspnet_regiis.exe -i
32.当连接sql server使用信任连接时就会出这个错误，在Windows XP当中，ASP.NET的运行帐号是ASPNET，而在Windows server 2003当中，运行帐号则改为了Network Service
33.一个网站的分网站的创建.
IIS里面在你的那个项目的文件夹上面右键属性里面
目录选项下面的
应用程序名后面点击创建即可！