色尼玛亚洲综合影院,亚洲3atv精品一区二区三区,麻豆freexxxx性91精品,欧美在线91

ASP.NET(C#)中操作SQLite數據庫實例

要想在ASP.NET項目中使用SQLite數據庫,先需下載一個ADO.NET 2.0 SQLite Data Provider,下載地址為:http://sourceforge.NET/project/showfiles.php?group_id=132486&package_id=145568,下載后安裝完畢后,該安裝程序自動在在系統注冊(即可在"添加引用"中看到所安裝的Provider).    

    

     然后,在項目中添加上圖所選項即可.

     ASPx頁面僅包含一按鈕btnTest,在頁面ASPx.cs頁面中,引入命名空間,貼入以下類似代碼即可.    
復制代碼 代碼如下:
using System;
using System.Data;
using System.Web.UI.WebControls;
using System.Data.SQLite;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnTest_Click(object sender, EventArgs e)
{
SQLiteConnection.ClearAllPools();
SQLiteConnection.CreateFile(Server.MapPath("~") + "/UserData.dbx");
SQLiteConnection conn = new SQLiteConnection("Data Source=" + Server.MapPath("~" + "/UserData.dbx"));
conn.Open();
Response.Write("打開數據庫成功~~<br />");
SQLiteCommand cmd = new SQLiteCommand();
cmd.CommandText = "create table Users (UserID int primary key,UserName varchar(100) not null,UserPassword varchar(100) not null)";
cmd.Connection = conn;
cmd.ExecuteNonQuery();
for (int i = 0; i < 100;i++ )
{
cmd.CommandText = "insert into Users (UserID,UserName,UserPassword) values (" + i + ",'TestUser_" + i + "','" + DateTime.Now.ToString().Replace(" ", "-").Replace(":", "-") + "')";
cmd.ExecuteNonQuery();
}
Response.Write("插入成功~~<br />");
cmd.CommandText = "select Username from Users where UserID=1";
cmd.Connection = conn;
string tempUserName = cmd.ExecuteScalar().ToString();
Response.Write("單個值查詢結果為:" + tempUserName + "<br /><br />");

cmd.CommandText = "select * from Users ";
cmd.Connection = conn;
SQLiteDataReader sdrInfo = cmd.ExecuteReader();
if (sdrInfo!= null)
{
int userID = 0;
string userName = string.Empty;
string userPassword = string.Empty;
while(sdrInfo.Read())
{
userID = Convert.ToInt32(sdrInfo["UserID"]);
userName = sdrInfo["UserName"].ToString();
userPassword = sdrInfo["UserPassword"].ToString();
Response.Write("UserID:"+userID+"<br />");
Response.Write("UserName:" + userName+ "<br />");
Response.Write("UserPassword:" + userPassword + "<br />");
Response.Write("<br />");
}
sdrInfo.Close();
sdrInfo.Dispose();
}
cmd.CommandText = "update Users set UserPassword='linxiang'";
cmd.Connection = conn;
cmd.ExecuteNonQuery();
Response.Write("更新數據庫中的數據成功.");
Response.Write("以下結果為查詢從數據庫中經過編輯過后的數據項<br /><br />");
cmd.CommandText = "select * from Users ";
cmd.Connection = conn;
sdrInfo = cmd.ExecuteReader();
if (sdrInfo != null)
{
int userID = 0;
string userName = string.Empty;
string userPassword = string.Empty;
while (sdrInfo.Read())
{
userID = Convert.ToInt32(sdrInfo["UserID"]);
userName = sdrInfo["UserName"].ToString();
userPassword = sdrInfo["UserPassword"].ToString();
Response.Write("UserID:" + userID + "<br />");
Response.Write("UserName:" + userName + "<br />");
Response.Write("UserPassword:" + userPassword + "<br />");
Response.Write("<br />");
}
sdrInfo.Close();
sdrInfo.Dispose();
}
conn.Clone();
conn.Dispose();
}
}

AspNet技術ASP.NET(C#)中操作SQLite數據庫實例,轉載需保留來源!

鄭重聲明:本文版權歸原作者所有,轉載文章僅為傳播更多信息之目的,如作者信息標記有誤,請第一時間聯系我們修改或刪除,多謝。

主站蜘蛛池模板: 平度市| 左贡县| 景德镇市| 进贤县| 乃东县| 蒙城县| 来宾市| 吉林市| 彭水| 汾阳市| 沧州市| 光泽县| 嵩明县| 宜春市| 都江堰市| 驻马店市| 资溪县| 明溪县| 樟树市| 台前县| 太谷县| 同德县| 陈巴尔虎旗| 含山县| 甘洛县| 鲁甸县| 乌海市| 高要市| 扎赉特旗| 晋州市| 温泉县| 长丰县| 遂平县| 巫山县| 恭城| 绥中县| 东明县| 鄂伦春自治旗| 西乡县| 探索| 南漳县|