c# - need help on Button event -

i have used 3-tier architecture insert database.i dont know code should write on button click event in .cs file.can some1 please me?

extension.cs

    public static dbparameter createandsetparameter(this dbcommand cmd,string parametername,dbtype dbtype,int size,parameterdirection direction) {     dbparameter p = cmd.createparameter();     p.parametername = parametername;     p.dbtype =dbtype;     p.size = size;     p.direction = direction;     cmd.parameters.add(p);     return p; } public static dbparameter createandsetparameter(this dbcommand cmd, string parametername, dbtype dbtype, int size,object value) {     dbparameter p = cmd.createparameter();     p.parametername = parametername;     p.dbtype = dbtype;     p.size = size;     p.direction = parameterdirection.input;     p.value = value;     cmd.parameters.add(p);     return p; } 

datageneric.cs

     public static int addslider(string @imgname,string @imgalt)     {     int rows=-1;     string query="insert [slider](imagename,imagealt) values(@imgname,@imagealt)";     dbcommand cmd = datageneric.createcommand();     cmd.commandtext = query;     cmd.createandsetparameter("@imgname",dbtype.string,50,imgname);     cmd.createandsetparameter("@imgalt", dbtype.string, 50, imgalt);     rows = datageneric.executenonquery(cmd);     return rows;     } 

design:

    imagename:<asp:textbox id="txt_name" runat="server" /><br />     imagealt:<asp:textbox id="txt_alt" runat="server" />     <asp:button id="btn" runat="server" onclick="btn_click" text="insert" /> 

code:

    protected void btn_click(object sender, eventargs e) {     ???????????? } 

protected void btn_click(object sender, eventargs e) {     datageneric.addslider(txt_name.text,txt_alt.text);  } 

as addslider static method can directly call method using class name

modify addslider methos

public static int addslider(string imgname,string imgalt) { int rows=-1; sqlconnection conn = new sqlconnection("connection string"); conn.open(); string query="insert [slider](imagename,imagealt) values(@imgname,@imagealt)"; dbcommand cmd = datageneric.createcommand(); cmd.connection = conn; cmd.commandtext = query; cmd.createandsetparameter("@imgname",dbtype.string,50,imgname); cmd.createandsetparameter("@imgalt", dbtype.string, 50, imgalt); rows = datageneric.executenonquery(cmd); conn.close(); return rows; }