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Database CURD Based on ADODBX and database CURD Based on ADODBX

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Database CURD Based on ADODBX and database CURD Based on ADODBX

I have been learning asp.net for more than a week. I didn't know anything about it before, and I don't know how to find some relevant materials to learn it. If I don't understand it, I will ask others how to do it and how to write it, if it weren't for the foundation of jsp and php, it would take a long time to learn. Record what you write, a simple CURD.

Index. aspx:

<% @ Page Language = "C #" AutoEventWireup = "true" CodeBehind = "index. aspx. cs" Inherits = "CURD. index" %>

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> </title>

</Head>
<Body>
<Form id = "form1" runat = "server">
<Div>
<% Response. Write (this. ClientHTML); %>
</Div>
</Form>
</Body>
</Html>

 

Reference ADODBX before connecting to the database;

Index. aspx. cs

 

Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Web;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using ADODBX;


Namespace CURD
{
Public partial class index: System. Web. UI. Page
{
Private string SysClientHTML = "";
Public string ClientHTML {get {return SysClientHTML ;}}

Protected void Page_Load (object sender, EventArgs e)
{
ADODBX. Connection objConn = new Connection ();
ADODBX. Recordset objRs = new Recordset ();

// SysClientHTML + = "<script type = \" text/javascript \ "> ";
// SysClientHTML + = "function confirmDel (){";
// SysClientHTML + = "if (confirm (\" are you sure you want to delete it? \")){";
// SysClientHTML + = "Response. Redirect (\" DelInfo. aspx? Id = <% = objRs. Fields ('number') %> \");";
// SysClientHTML + = "}";
// SysClientHTML + = "}";
// SysClientHTML + = "</script> ";


SysClientHTML + = "<table border = 1 style = \" margin: 0 auto; width: 600px; text-align: center; \ "> ";
SysClientHTML + = "<tr> ";
SysClientHTML + = "<td height = \" 25px; \ "> information number </td> ";
SysClientHTML + = "<td height = \" 25px; \ "> User Name </td> ";
SysClientHTML + = "<td height = \" 25px; \ "> User age </td> ";
SysClientHTML + = "<td height = \" 25px; \ "> User email </td> ";
SysClientHTML + = "<td height = \" 25px; \ "> Data Operations </td> ";
SysClientHTML + = "</tr> ";

ObjConn. Open ("Provider = Microsoft. Jet. OLEDB.4.0; Data Source =" + Server. MapPath ("~ /App_data/") +" CRUDTest. mdb ");
ObjRs. Open ("select * from [person]", objConn, 3 );

While (! ObjRs. EOF)
{
SysClientHTML + = "<tr> ";
SysClientHTML + = "<td height = \" 25px; \ ">" + objRs. Fields ("no.") + "</td> ";
SysClientHTML + = "<td height = \" 25px; \ ">" + objRs. Fields ("username") + "</td> ";
SysClientHTML + = "<td height = \" 25px; \ ">" + objRs. Fields ("age") + "</td> ";
SysClientHTML + = "<td height = \" 25px; \ ">" + objRs. Fields ("Email") + "</td> ";
SysClientHTML + = "<td height = \" 25px; \ "> ";
// SysClientHTML + = "<a href = \" AddInfo. aspx \ "> Add </a> & nbsp; <a href = \" JavaScript: confirmDel (); \ "> Delete </a> & nbsp; <a href = \ "# \"> modify </a> ";
SysClientHTML + = "<a href = \" AddInfo. aspx \ "> Add </a> & nbsp; <a href = \" DelInfo. aspx? Id = "+ objRs. Fields (" no. ") +" \ "> Delete </a> & nbsp; <a href = \" ChangeInfo. aspx? Id = "+ objRs. Fields (" no. ") +" \ "> modify </a> ";

SysClientHTML + = "</td> ";
SysClientHTML + = "</tr> ";
ObjRs. MoveNext ();
}
ObjRs. Close ();
ObjConn. Close ();
ObjRs = null;
ObjConn = null;

SysClientHTML + = "</table> ";
}
}
}

The query is complete, and the next step is to add data to the database.

AddInfo. aspx

<% @ Page Language = "C #" AutoEventWireup = "true" CodeBehind = "AddInfo. aspx. cs" Inherits = "CURD. AddInfo" %>

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head id = "Head1" runat = "server">
<Title> </title>
</Head>
<Body>
<% If (Request ["action"] = null | Request ["action"] = "") {%>
<Form id = "form1" runat = "server">
<Script type = "text/javascript">
Function selfSubmit (){
Var form1 = document. getElementById ("form1 ");
Form1.action = "AddInfo. aspx? Action = savedata ";
Form1.submit ();
}
</Script>
<Table border = "1" id = "table1" style = "margin: 0 auto; width: 400px;">
<Tr>
<Td width = "200"> user nickname </td>
<Td width = "200"> <asp: TextBox runat = "server" ID = "username"> </asp: TextBox> </td>
</Tr>
<Tr>
<Td width = "200"> User age </td>
<Td width = "200"> <asp: TextBox runat = "server" ID = "age"> </asp: TextBox> </td>
</Tr>
<Tr>
<Td width = "200"> User email </td>
<Td width = "200"> <asp: TextBox runat = "server" ID = "Email"> </asp: TextBox> </td>
</Tr>
<Tr>
<Td width = "200" colspan = "2" style = "text-align: center;">
<Input type = "button" value = "Submit" onclick = "javascript: selfSubmit ();"/>
<Input type = "reset" value = "reset"/>
</Td>
</Tr>
</Table>
</Form>
<% }%>


<% If (Request ["action"] = "savedata "){
// Data output after data return
} %>
</Body>
</Html>

 

AddInfo. aspx. cs

Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Web;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using ADODBX;
Namespace CURD
{
Public partial class AddInfo: System. Web. UI. Page
{
Protected void Page_Load (object sender, EventArgs e)
{
If (Request ["action"] = "savedata") savedata ();
}
Public void savedata (){
String Suser = Request ["username"];
String Sage = Request ["age"];
String SEmail = Request ["Email"];
// Create an object
ADODBX. Connection objConn = new Connection ();
ADODBX. Recordset objRs = new Recordset ();

// Link to the database
ObjConn. Open ("Provider = Microsoft. Jet. OLEDB.4.0; Data Source =" + Server. MapPath ("~ /App_data/") +" CRUDTest. mdb ");
ObjRs. Open ("Select * from [person]", objConn, 2 );
ObjRs. AddNew ();
ObjRs. Fields ("username", Suser );
ObjRs. Fields ("age", Sage );
ObjRs. Fields ("Email", SEmail );
ObjRs. Update ();
// Server. Execute ("index. aspx ");
Response. Redirect ("~ /Index. aspx ");
ObjRs. Close ();
ObjConn. Close ();
ObjRs = null;
ObjConn = null;

}
}
}

SaveInfo. aspx

<% @ Page Language = "C #" AutoEventWireup = "true" CodeBehind = "SaveInfo. aspx. cs" Inherits = "CURD. SaveInfo" %>

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> </title>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Div>

</Div>
</Form>
</Body>
</Html>

 

SaveInfo. aspx. cs

Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Web;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using ADODBX;

Namespace CURD
{
Public partial class SaveInfo: System. Web. UI. Page
{
Protected void Page_Load (object sender, EventArgs e)
{
String Suser = Request ["username"];
// String sUserName
// All obtained by ruquest are string types for type conversion.
Int Sage = Convert. ToInt32 (Request ["age"]);
String SEmail = Request ["Email"];
// Create an object
ADODBX. Connection objConn = new Connection ();
ADODBX. Recordset objRs = new Recordset ();

// Link to the database
ObjConn. Open ("Provider = Microsoft. Jet. OLEDB.4.0; Data Source =" + Server. MapPath ("~ /App_data/") +" CRUDTest. mdb ");
ObjRs. Open ("select * form [use]", objConn, 2 );
ObjRs. AddNew ();
ObjRs. Fields ("username", Suser );
ObjRs. Fields ("age", Convert. ToString (Sage ));
ObjRs. Fields ("Email", SEmail );
ObjRs. Update ();
ObjRs. Close ();
ObjConn. Close ();
ObjRs = null;
ObjConn = null;
}
}
}

After adding the data, the following part is the modification part. In the modification part, pay attention to the id transmission problem.

 

ChangeInfo. aspx

<% @ Page Language = "C #" EnableViewStateMac = "false" AutoEventWireup = "true" CodeBehind = "ChangeInfo. aspx. cs" Inherits = "CURD. changeInfo" %>

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> </title>
</Head>
<Body>
<Form id = "form1" runat = "server" action = "UpdateInfo. aspx" method = "post">
<% -- <Asp: TextBox runat = "server" ID = "hidden" name = "id" Visible = "False"> </asp: TextBox> -- %>
<Input type = "hidden" id = "ID" name = "hidden" runat = "server"/>
<Table border = 1 style = "margin: 0 auto; width: 400px;">
<Tr>
<Td width = "200px;"> User Name </td>
<Td width = "200px;"> <asp: TextBox ID = "username" runat = "server"> </asp: TextBox> </td>
</Tr>
<Tr>
<Td width = "200px;"> User age </td>
<Td width = "200px;"> <asp: TextBox runat = "server" ID = "age"> </asp: TextBox> </td>
</Tr>
<Tr>
<Td width = "200px;"> User email </td>
<Td width = "200px;"> <asp: TextBox runat = "server" ID = "Email"> </asp: TextBox> </td>
</Tr>
<Tr>
<Td style = "text-align: center" colspan = "2">
<Input type = "submit" value = "submit"/>
<Input type = "reset" value = "reset"/>
</Td>
</Tr>
</Table>
</Form>
</Body>
</Html>

 

 

ChangeInfo. aspx. cs

 

Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Web;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using ADODBX;

Namespace CURD
{
Public partial class changeInfo: System. Web. UI. Page
{
Private string SysClientHTML = "";
Public string ClientHTML {get {return SysClientHTML ;}}

Protected void Page_Load (object sender, EventArgs e)
{
Int id = Convert. ToInt32 (Request ["id"]);
ADODBX. Connection objConn = new Connection ();
ADODBX. Recordset objRs = new Recordset ();
ObjConn. Open ("Provider = Microsoft. Jet. OLEDB.4.0; Data Source =" + Server. MapPath ("~ /App_data/") +" CRUDTest. mdb ");
ObjRs. Open ("select * from person where no. =" + id, objConn, 2 );

Username. Text = objRs. Fields ("username ");
Age. Text = objRs. Fields ("age ");
Email. Text = objRs. Fields ("Email ");
ID. Value = objRs. Fields ("no ");

ObjRs. Close ();
ObjConn. Close ();
ObjConn = null;
ObjRs = null;
}
}
}

 

 

UpdateInfo. aspx

 

<% @ Page Language = "C #" EnableViewStateMac = "false" AutoEventWireup = "true" CodeBehind = "UpdateInfo. aspx. cs" Inherits = "CURD. UpdateInfo" %>

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> </title>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Div>

</Div>
</Form>
</Body>
</Html>

 

UpdateInfo. aspx. cs

 

Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Web;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using ADODBX;

Namespace CURD
{
Public partial class UpdateInfo: System. Web. UI. Page
{
Protected void Page_Load (object sender, EventArgs e)
{
String Sid = Request ["ID"];
String Suser = Request ["username"];
Response. Write (Suser );
String Sage = Request ["age"];
String SEmail = Request ["Email"];
// Create an object
ADODBX. Connection objConn = new Connection ();
ADODBX. Recordset objRs = new Recordset ();

// Link to the database
ObjConn. Open ("Provider = Microsoft. Jet. OLEDB.4.0; Data Source =" + Server. MapPath ("~ /App_data/") +" CRUDTest. mdb ");
ObjRs. Open ("Select * from [person] where id =" + Sid, objConn, 2 );
ObjRs. Fields ("username", Suser );
ObjRs. Fields ("age", Sage );
ObjRs. Fields ("Email", SEmail );
ObjRs. Update ();
// Server. Execute ("index. aspx ");
Response. Redirect ("index. aspx ");
ObjRs. Close ();
ObjConn. Close ();
ObjRs = null;
ObjConn = null;
}
}
}

 

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