Oracle資料庫的增刪改查（簡單操作）

1.首先在 Webconfig裡面填寫資料庫連接字串

<connectionStrings>
<add name="Oraclecon" connectionString="Data Source=資料庫名稱;Persist Security Info=True;User ID=使用者名稱;Password=密碼;Unicode=True" providerName="System.Data.OracleClient"/>
</connectionStrings>

2.第二步，建立一個頁面，添加下面的代碼

public partial class WebForm1 : System.Web.UI.Page
{

///////////////串連資料庫///////////////////////////////
string oraclestr = ConfigurationManager.ConnectionStrings["oraclecon"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
LoadDate();
}
}

當程式時，載入下面的方法，將資料顯示出來，綁定的是GridView；

public void LoadDate()
{
OracleConnection oracle = new OracleConnection(oraclestr);
oracle.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = oracle;
cmd.CommandText = "select * from T_Student ORDER BY ID";
OracleDataAdapter adapter = new OracleDataAdapter(cmd);
DataTable dt = new DataTable();
adapter.Fill(dt);
cmd.Dispose();
oracle.Dispose();
this.GridView1.DataSource = dt;
this.GridView1.DataBind();
}

、、、、、、、、、、增加代碼、、、、、、、、、、、、、、、、

protected void Button1_Click(object sender, EventArgs e)
{
OracleConnection oracle = new OracleConnection(oraclestr);
oracle.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = oracle;
cmd.CommandText = "insert into T_Student (ID,SNAME,MOBILE)values(:id,:name,:mobile)";
cmd.Parameters.AddWithValue(":id",txtid.Text);
cmd.Parameters.AddWithValue(":name",txtname.Text);
cmd.Parameters.AddWithValue(":mobile",txtmobile.Text);
int numb = cmd.ExecuteNonQuery();

//cmd.Dispose();
//oracle.Dispose();

if(numb>0)
{
Response.Write("ok");
LoadDate();
}
}

、、、、、、、、刪除代碼、、、、、、、、

protected void LinkButton1_Click(object sender, EventArgs e)
{
LinkButton btndelete = sender as LinkButton;
OracleConnection oracle = new OracleConnection(oraclestr);
oracle.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = oracle;
cmd.CommandText = "delete from T_Student where ID=:id";
cmd.Parameters.AddWithValue(":id",btndelete.CommandArgument);

int numb = cmd.ExecuteNonQuery();

if (numb > 0)
{
Response.Write("ok");
LoadDate();
}
}

、、、、、、、、、、編輯代碼、、、、、、、、、、、、、、

protected void LinkButton2_Click(object sender, EventArgs e)
{
LinkButton btnEdit = sender as LinkButton;
Response.Redirect("WebEdit.aspx?&id="+btnEdit.CommandArgument);//////////////////問號傳值
}
}

3.第三步：

public partial class WebEdit : System.Web.UI.Page
{
string oraclestr = ConfigurationManager.ConnectionStrings["oraclecon"].ConnectionString;
string id;
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
id=Request.QueryString["id"];//////////////把傳過來的值賦給一個變數；
Load();
}
}
public void Load() ////////////顯示資料
{
OracleConnection oracle = new OracleConnection(oraclestr);
oracle.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = oracle;
cmd.CommandText = "select * from T_Student where ID=:id";
cmd.Parameters.AddWithValue(":id",id);
OracleDataAdapter adapter = new OracleDataAdapter(cmd);
DataTable dt = new DataTable();
adapter.Fill(dt);
cmd.Dispose();
oracle.Dispose();
this.txtid.Text = dt.Rows[0]["ID"].ToString();
this.txtname.Text=dt.Rows[0]["SNAME"].ToString();
this.txtmobile.Text=dt.Rows[0]["MOBILE"].ToString();
}

////////編輯部分/////////
protected void btnSave_Click(object sender, EventArgs e)
{
string id = txtid.Text;
string name = txtname.Text;
string mobile = txtmobile.Text;
OracleConnection oracle = new OracleConnection(oraclestr);
oracle.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = oracle;
cmd.CommandText = "update T_Student SET SNAME=:NAME,MOBILE=:MOBILE where ID=:id";
cmd.Parameters.AddWithValue(":NAME",name);
cmd.Parameters.AddWithValue(":MOBILE",mobile);
cmd.Parameters.AddWithValue(":id",id);
int numb = cmd.ExecuteNonQuery();

if (numb > 0)
{
Response.Write("ok");
Response.Redirect("WebForm1.aspx");////////////////////將修改的資料，儲存起來，再傳回起始頁面，並在起始頁面顯示修改的資料。
}
}
}