Sqlite 常用函数封装：修改密码，创建数据库、获取表段、字段，取值、插入、删除数据、执行Sqlite指令

原文地址：http://www.jb51.cc/article/p-unrjqlwc-gu.html

以下是频繁用到的sqlite函数，内容格式相对固定，封装一下有助于提高开发效率（^_^至少提高Codeeer的效率了）

而且，我发现sqlite中文资料比较少，起码相对其他找起来要复杂些，服务一下大众~

我没有封装读取部分，因为数据库读取灵活性太大，封装起来难度也大，而且就算封装好了，也难以应付所有情况，还是建议根据实际情况设计代码逻辑。

解释下，为啥代码中的注释基本都用英文写了，因为这段时间在学双拼- -。可是还不太熟悉，打字超慢，而且Code的时候容易打断思路，好在~英文不多，而且这些都看不懂的话你……你要向我解释一下你是怎么一路学到数据库的 0。0

[csharp] view plain copy print ?

///<summary>
///ChangePassword
///</summary>
///<paramname="DataSource"></param>
///<paramname="OldPassword"></param>
///<paramname="NewPassword"></param>
///<returns></returns>
publicstaticboolPasswordChange(stringDataSource,stringOldPassword,stringNewPassword)
{
try
{
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=OldPassword;
conn.ConnectionString=SCS.ToString();
conn.Open();
//ChangePassword
conn.ChangePassword(NewPassword);
}
returntrue;
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,"提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
returnfalse;
}
}

/// <summary>
/// Change Password
/// </summary>
/// <param name="DataSource"></param>
/// <param name="OldPassword"></param>
/// <param name="NewPassword"></param>
/// <returns></returns>
public static bool PasswordChange(string DataSource,string OldPassword,string NewPassword)
{
    try
    {
        using (sqliteConnection conn = new sqliteConnection())
        {
            sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
            SCS.DataSource = DataSource;
            SCS.Password = OldPassword;
            conn.ConnectionString = SCS.ToString();

            conn.Open();

            //Change Password
            conn.ChangePassword(NewPassword);
        }
        return true;
    }
    catch (Exception E)
    {
        MessageBox.Show(E.Message,"提示",MessageBoxIcon.Information);
        return false;
    }
}

创建数据库

[csharp] view plain copy print ?

///<summary>
///CreatNewsqliteFile
///</summary>
///<paramname="NewTable">NewTableName</param>
///<paramname="NewWords">WordslistoftheNewTable</param>
///<paramname="CreatNew">CreatorAddtotheDatabase(UsingtomakeMultiTables)</param>
///<returns></returns>
publicstaticboolCreat(stringDataSource,stringNewTable,List<string>NewWords,stringPassWord=null,boolCreatNew=true)
{
try
{
if(CreatNew)
{
//CreatDataFile
sqliteConnection.CreateFile(DataSource);
}
//CreatTable
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
//Creat
stringBazinga="createtable["+NewTable+"](";
foreach(stringWordsinNewWords)
{
Bazinga+="["+Words+"]TEXTCOLLATENOCASE,";
}
//SetPrimaryKey
//TheTopitemfromthe"NewWords"
Bazinga+=@"PRIMARYKEY(["+NewWords[0]+"]))";
DbCommandcmd=conn.CreateCommand();
cmd.Connection=conn;
cmd.CommandText=Bazinga;
cmd.ExecuteNonQuery();
}
returntrue;
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
returnfalse;
}
}

/// <summary>
/// Creat New sqlite File
/// </summary>
/// <param name="NewTable">New Table Name</param>
/// <param name="NewWords">Words list of the New Table</param>
/// <param name="CreatNew">Creat or Add to the Database(Using to make Multi Tables)</param>
/// <returns></returns>
public static bool Creat(string DataSource,string NewTable,List<string> NewWords,string PassWord = null,bool CreatNew = true)
{
    try
    {
        if (CreatNew)
        {
            //Creat Data File
            sqliteConnection.CreateFile(DataSource);
        }

        //Creat Table
        using (sqliteConnection conn = new sqliteConnection())
        {
            sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
            SCS.DataSource = DataSource;
            SCS.Password = PassWord;
            conn.ConnectionString = SCS.ToString();

            conn.Open();

            //Creat
            string Bazinga = "create table [" + NewTable + "] (";
            foreach (string Words in NewWords)
            {
                Bazinga += "[" + Words + "] TEXT COLLATE NOCASE,";
            }

            //Set Primary Key
            //The Top item from the "NewWords"
            Bazinga += @"PRIMARY KEY ([" + NewWords[0] + "]))";
            DbCommand cmd = conn.CreateCommand();
            cmd.Connection = conn;
            cmd.CommandText = Bazinga;
            cmd.ExecuteNonQuery();
        }
        return true;
    }
    catch (Exception E)
    {
        MessageBox.Show(E.Message,MessageBoxIcon.Information);
        return false;
    }
}

获取表段

[csharp] view plain copy print ?

///<summary>
///GetTablesFromsqlite
///</summary>
///<returns>listofTables</returns>
publicstaticList<string>GetTables(stringDataSource,stringPassWord=null)
{
List<string>ResultLst=newList<string>();
try
{
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
using(sqliteCommandtablesGet=newsqliteCommand("SELECTnamefromsqlite_masterwheretype='table'",conn))
{
using(sqliteDataReadertables=tablesGet.ExecuteReader())
{
while(tables.Read())
{
try
{
ResultLst.Add(tables[0].ToString());
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
}
}
}
}
}
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
}
returnResultLst;
}

/// <summary>
/// Get Tables From sqlite
/// </summary>
/// <returns>list of Tables</returns>
public static List<string> GetTables(string DataSource,string PassWord = null)
{
    List<string> ResultLst = new List<string>();

    try
    {
        using (sqliteConnection conn = new sqliteConnection())
        {
            sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
            SCS.DataSource = DataSource;
            SCS.Password = PassWord;
            conn.ConnectionString = SCS.ToString();

            conn.Open();
            using (sqliteCommand tablesGet = new sqliteCommand("SELECT name from sqlite_master where type='table'",conn))
            {
                using (sqliteDataReader tables = tablesGet.ExecuteReader())
                {
                    while (tables.Read())
                    {
                        try
                        {
                            ResultLst.Add(tables[0].ToString());
                        }
                        catch (Exception E)
                        {
                            MessageBox.Show(E.Message,MessageBoxIcon.Information);
                        }
                    }
                }
            }
        }
    }
    catch (Exception E)
    {
        MessageBox.Show(E.Message,MessageBoxIcon.Information);
    }

    return ResultLst;
}

获取字段

[csharp] view plain copy print ?

///<summary>
///GetWordsFromTable->sqlite
///</summary>
///<paramname="TargetTable">TargetTable</param>
///<returns>listofWords</returns>
publicstaticList<string>GetWords(stringDataSource,stringTargetTable,stringPassWord=null)
{
List<string>WordsLst=newList<string>();
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
using(sqliteCommandtablesGet=newsqliteCommand(@"SELECT*FROM"+TargetTable,conn))
{
using(sqliteDataReaderWords=tablesGet.ExecuteReader())
{
try
{
for(inti=0;i<Words.FieldCount;i++)
{
WordsLst.Add(Words.GetName(i));
}
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
}
}
}
}
returnWordsLst;
}

/// <summary>
/// Get Words From Table->sqlite
/// </summary>
/// <param name="TargetTable">Target Table</param>
/// <returns>list of Words</returns>
public static List<string> GetWords(string DataSource,string TargetTable,string PassWord = null)
{
    List<string> WordsLst = new List<string>();

    using (sqliteConnection conn = new sqliteConnection())
    {
        sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
        SCS.DataSource = DataSource;
        SCS.Password = PassWord;
        conn.ConnectionString = SCS.ToString();

        conn.Open();
        using (sqliteCommand tablesGet = new sqliteCommand(@"SELECT * FROM " + TargetTable,conn))
        {
            using (sqliteDataReader Words = tablesGet.ExecuteReader())
            {
                try
                {
                    for (int i = 0; i < Words.FieldCount; i++)
                    {
                        WordsLst.Add(Words.GetName(i));
                    }
                }
                catch (Exception E)
                {
                    MessageBox.Show(E.Message,MessageBoxIcon.Information);
                }
            }
        }
    }

    return WordsLst;
}

取值

[csharp] view plain copy print ?

///<summary>
///GetValuesFromsqlite
///</summary>
///<returns>listofValues</returns>
publicstaticList<string>GetValues(stringDataSource,stringsql,stringGetColumu,stringPassWord=null)
{
List<string>ResultLst=newList<string>();
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
using(sqliteCommandcmd=newsqliteCommand(sql,conn))
{
using(sqliteDataReaderdr=cmd.ExecuteReader())
{
while(dr.Read())
{
try
{
ResultLst.Add(dr[GetColumu].ToString());
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
}
}
}
}
}
returnResultLst;
}

/// <summary>
/// Get Values From sqlite
/// </summary>
/// <returns>list of Values</returns>
public static List<string> GetValues(string DataSource,string sql,string GetColumu,string PassWord = null)
{
    List<string> ResultLst = new List<string>();

    using (sqliteConnection conn = new sqliteConnection())
    {
        sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
        SCS.DataSource = DataSource;
        SCS.Password = PassWord;
        conn.ConnectionString = SCS.ToString();

        conn.Open();
        using (sqliteCommand cmd = new sqliteCommand(sql,conn))
        {
            using (sqliteDataReader dr = cmd.ExecuteReader())
            {
                while (dr.Read())
                {
                    try
                    {
                        ResultLst.Add(dr[GetColumu].ToString());
                    }
                    catch (Exception E)
                    {
                        MessageBox.Show(E.Message,MessageBoxIcon.Information);
                    }
                }
            }
        }
    }

    return ResultLst;
}

插入数据

[csharp] view plain copy print ?

///<summary>
///InsertData
///</summary>
///<paramname="DataSource"></param>
///<paramname="TargetTable"></param>
///<returns></returns>
publicstaticboolInsert(stringDataSource,stringColumnS,stringValueS,stringPassWord=null)
{
try
{
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
//Insert
DbCommandcmd=conn.CreateCommand();
cmd.CommandText="insertinto["+TargetTable+"]("+ColumnS+")values("+ValueS+")";
cmd.ExecuteNonQuery();
returntrue;
}
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
returnfalse;
}
}

/// <summary>
/// Insert Data
/// </summary>
/// <param name="DataSource"></param>
/// <param name="TargetTable"></param>
/// <returns></returns>
public static bool Insert(string DataSource,string ColumnS,string ValueS,string PassWord = null)
{
    try
    {
        using (sqliteConnection conn = new sqliteConnection())
        {
            sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
            SCS.DataSource = DataSource;
            SCS.Password = PassWord;
            conn.ConnectionString = SCS.ToString();

            conn.Open();

            //Insert
            DbCommand cmd = conn.CreateCommand();
            cmd.CommandText = "insert into [" + TargetTable + "] (" + ColumnS + ") values (" + ValueS + ")";
            cmd.ExecuteNonQuery();

            return true;
        }
    }
    catch (Exception E)
    {
        MessageBox.Show(E.Message,MessageBoxIcon.Information);
        return false;
    }
}

删除数据

[csharp] view plain copy print ?

///<summary>
///DeleteDate
///</summary>
///<paramname="DataSource"></param>
///<paramname="TargetTable"></param>
///<paramname="Word"></param>
///<paramname="Value"></param>
///<returns></returns>
publicstaticboolDelete(stringDataSource,stringWord,stringValue,stringPassWord=null)
{
try
{
//Connect
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
DbCommandcmd=conn.CreateCommand();
cmd.Connection=conn;
//Delete
cmd.CommandText="DeleteFrom"+TargetTable+"where["+Word+"]='"+Value+"'";
cmd.ExecuteNonQuery();
}
returntrue;
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
returnfalse;
}
}

/// <summary>
/// Delete Date
/// </summary>
/// <param name="DataSource"></param>
/// <param name="TargetTable"></param>
/// <param name="Word"></param>
/// <param name="Value"></param>
/// <returns></returns>
public static bool Delete(string DataSource,string Word,string Value,string PassWord = null)
{
    try
    {
        //Connect
        using (sqliteConnection conn = new sqliteConnection())
        {
            sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
            SCS.DataSource = DataSource;
            SCS.Password = PassWord;
            conn.ConnectionString = SCS.ToString();

            conn.Open();

            DbCommand cmd = conn.CreateCommand();
            cmd.Connection = conn;
            //Delete
            cmd.CommandText = "Delete From " + TargetTable + " where [" + Word + "] = '" + Value + "'";
            cmd.ExecuteNonQuery();
        }

        return true;
    }
    catch (Exception E)
    {
        MessageBox.Show(E.Message,MessageBoxIcon.Information);
        return false;
    }
}

执行sqlite指令

[csharp] view plain copy print ?

///<summary>
///sqliteCommand
///</summary>
///<paramname="DataSource"></param>
///<paramname="sql"></param>
///<returns></returns>
publicstaticboolsqlCommand(stringDataSource,stringPassWord=null)
{
try
{
using(sqliteConnectionconn=newsqliteConnection())
{
sqliteConnectionStringBuilderSCS=newsqliteConnectionStringBuilder();
SCS.DataSource=DataSource;
SCS.Password=PassWord;
conn.ConnectionString=SCS.ToString();
conn.Open();
using(sqliteCommandcmd_Re=newsqliteCommand(sql,conn))
{
cmd_Re.ExecuteNonQuery();
}
}
returntrue;
}
catch(ExceptionE)
{
MessageBox.Show(E.Message,MessageBoxIcon.Information);
returnfalse;
}
}

/// <summary>
/// sqliteCommand
/// </summary>
/// <param name="DataSource"></param>
/// <param name="sql"></param>
/// <returns></returns>
public static bool sqlCommand(string DataSource,string PassWord = null)
{
    try
    {
        using (sqliteConnection conn = new sqliteConnection())
        {
            sqliteConnectionStringBuilder SCS = new sqliteConnectionStringBuilder();
            SCS.DataSource = DataSource;
            SCS.Password = PassWord;
            conn.ConnectionString = SCS.ToString();

            conn.Open();
            using (sqliteCommand cmd_Re = new sqliteCommand(sql,conn))
            {
                cmd_Re.ExecuteNonQuery();
            }
        }
        return true;
    }
    catch (Exception E)
    {
        MessageBox.Show(E.Message,MessageBoxIcon.Information);
        return false;
    }
}

原文链接：https://www.f2er.com/sqlite/201239.html

Sqlite 常用函数封装：修改密码，创建数据库、获取表段、字段，取值、插入、删除数据、执行Sqlite指令

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