什么是：标准表达式中数据类型不匹配？我看不懂！

2004-03-04 04:25:40 107 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

牛客网-字节跳动公司真题-万万没想到之聪明的编辑万万没想到之聪明的编辑牛客网-字节跳动公司真题题目牛客链接解题思路双指针具体思路代码中代码 #include<iostream> #include<cstring> using namespace std; const int N=1000010; char s[N]; /** * 思路： * 两个指针初始指向s[0] * 如果没出... 阅读详情

下面是源代码的一部分，错误已经标出来了。

<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" Debug="True" %>
<%@ Import NameSpace = "System" %>
<%@ Import NameSpace = "System.Data" %>
<%@ Import NameSpace = "System.Data.OleDb" %>
<Script language="c#" runat="server">
OleDbConnection myConn;
string strSQL;
public void Page_Load(Object src, EventArgs e)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(".\\Vlink.mdb");
myConn = new OleDbConnection(strConn);
myConn.Open();

//Record Page Visit
//Get Date Serials
DateTime myDate = DateTime.Now;
string myDaySerials = myDate.Year.ToString();
if(myDate.Month.ToString().Length < 2)
myDaySerials += "0" + myDate.Month.ToString();
else
myDaySerials += myDate.Month.ToString();
if(myDate.Day.ToString().Length < 2)
myDaySerials += "0" + myDate.Day.ToString();
else
myDaySerials += myDate.Day.ToString();
//Get Over

string sqlClick = "Select [Clicks] From [Counter] Where id=1";
string sqlUpdate = "Update [Counter] Set [Clicks]=[Clicks]+1 Where id=1";

string sInsert = "Insert Into [Counter] ([Clicks], [DaySerial]) Values (1, " + myDaySerials + ")";
string sUpdate = "Update [Counter] Set [Clicks]=[Clicks]+1 Where [DaySerial] = '" + myDaySerials + "'";
string sClick = "Select [Clicks] From [Counter] Where [DaySerial] = '" + myDaySerials + "'";

//Update Database start
//1.Clicks
OleDbCommand myComm = new OleDbCommand(sqlUpdate, myConn);
myComm.ExecuteNonQuery();
myComm.CommandText = sqlClick;
OleDbDataReader myReader = myComm.ExecuteReader();
if(myReader.Read())
{
Clicks.Text = "" + myReader["Clicks"].ToString() + "";
}
else
{
Clicks.Text = "Not Found!";
}
myReader.Close();
//2.TodayClicks
try{
myComm.CommandText = sUpdate;
myComm.ExecuteNonQuery();
}
catch(Exception myError)
{
myComm.CommandText = sInsert;
myComm.ExecuteNonQuery();
}
myComm.CommandText = sClick;
//###############################################
myReader = myComm.ExecuteReader();//####出错的位置！！
//###############################################
if(myReader.Read())
{
TodayClicks.Text = "" + myReader["Clicks"].ToString() + "";
}
else
{
TodayClicks.Text = "Not Found!";
}
myReader.Close();

//Page Visit Over
......

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