ADO.NET数据操作

数据浏览


对TextBox进行简单绑定







private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
Session["RecordPos"] = 0;
}
sqlDataAdapter1.Fill(dsStudent1.tbStudentinfo);
this.DataBind();
}

private void btnPrev_Click(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
if (RecordPos > 0)
{
RecordPos--;
}
Session["RecordPos"] = RecordPos;
this.DataBind();
}

private void btnNext_Click(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
RecordPos++;
if (RecordPos >= dsStudent1.tbStudentinfo.Rows.Count)
{
RecordPos=0;
}
Session["RecordPos"] = RecordPos;
this.DataBind();
}

private void tbID_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbID.Text = dsStudent1.tbStudentinfo.Rows[RecordPos]["StudentID"].ToString();
}
private void tbName_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbName.Text = dsStudent1.tbStudentinfo.Rows[RecordPos]["StudentName"].ToString();
}
private void tbScore_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbScore.Text = dsStudent1.tbStudentinfo.Rows[RecordPos]["Score"].ToString();
}



简单连接的例子




简单绑定一个Label
<%@ Import Namespace="System.Drawing" %> 调入一个命名空间
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
ArrayList ar = new ArrayList();
ar.Add("Red");
ar.Add("Blue");
ar.Add("Green");
ar.Add("Orange");
ddlColor.DataSource = ar;
}
this.DataBind();
}



private void btnAdd_Click(object sender, System.EventArgs e)
{
string strSql = "insert into tbUserInfo values('"+tbName.Text+"','"+tbPass.Text+"',"+"'"+trblSex.SelectedItem.Text+"'"+",";
strSql += " '"+cdDate.SelectedDate.ToString()+"','"+tbZhiWei.Text+"','"+tbNotes.Text+"')";
ExcuteSql(strSql);
}
private void ExcuteSql(string strSql)
{
try
{
SqlConnection con = new SqlConnection();
con.ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["DSN"];
con.Open();
//添加纪录...
SqlCommand com = new SqlCommand(strSql,con);
com.ExecuteNonQuery();
con.Close();
Response.Write("<script language='javascript'>alert('插入成功!')</script>");
}
catch(Exception ee)
{
Response.Write("发生错误:"+ee.Message);
}
}



private void btnLogin_Click(object sender, System.EventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["DSN"];
con.Open();

string strSql = "select UserName,UserPass from tbUserInfo where UserName='"+tbName.Text+"' and UserPass='"+tbPass.Text+"'";
SqlCommand com = new SqlCommand(strSql,con);
SqlDataReader dr = com.ExecuteReader();
//以下执行查询
bool bExist = false;
while(dr.Read())
{
bExist = true;
Session["UserName"] = dr.GetString(0);
Session["UserPass"] = dr.GetString(1);
}
if(bExist)
Response.Redirect("023Query.aspx");
else
Response.Write("<script language='javascript'>alert('用户名称或密码错误!')</script>");

con.Close();
}



private void Page_Load(object sender, System.EventArgs e)
{
lbUserName.Text = Session["UserName"].ToString();
}
private void btnQuery_Click(object sender, System.EventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["DSN"];
con.Open();
string strSql = "select EnterDate from tbUserInfo where UserName='"+tbName.Text+"'";
SqlCommand com = new SqlCommand(strSql,con);

com.Parameters.Add("@Name",SqlDbType.VarChar,50,"UserName");
com.Parameters["@Name"].Value = tbName.Text;
com.CommandText = "select EnterDate from tbUserInfo where UserName=@Name";

object obj = com.ExecuteScalar();
if(obj!=null)
lbHireDate.Text = obj.ToString();
else
lbHireDate.Text = "数据库中没有此人!";
con.Close();
}



private void Page_Load(object sender, System.EventArgs e)
{
sqlDataAdapter1.Fill(dsUser1.tbUserInfo);
if(!IsPostBack)
{
Session["RecordPos"] = 0;

this.DataBind();
}
}
private void ExcuteSql(string strSql)
{
try
{
SqlConnection con = new SqlConnection();
con.ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["DSN"];
con.Open();
//添加纪录...
SqlCommand com = new SqlCommand(strSql,con);
com.ExecuteNonQuery();
con.Close();
//Response.Write("<script language='javascript'>alert('操作成功!')</script>");
}
catch(Exception ee)
{
Response.Write("发生错误:"+ee.Message);
}
}
//下一页
private void btnNext_Click(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
RecordPos++;
if (RecordPos >= dsUser1.tbUserInfo.Rows.Count)
{
RecordPos=0;
}
Session["RecordPos"] = RecordPos;
this.DataBind();
}
//上一页
private void btnPrev_Click(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
if (RecordPos > 0)
{
RecordPos--;
}
Session["RecordPos"] = RecordPos;
this.DataBind();
}
//数据绑定
private void tbName_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbName.Text = dsUser1.tbUserInfo.Rows[RecordPos]["UserName"].ToString();
}
private void tbPass_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbPass.Text = dsUser1.tbUserInfo.Rows[RecordPos]["UserPass"].ToString();
}
private void tbSex_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbSex.Text = dsUser1.tbUserInfo.Rows[RecordPos]["Sex"].ToString();
}
private void tbZhiWei_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbZhiWei.Text = dsUser1.tbUserInfo.Rows[RecordPos]["zhiwei"].ToString();
}
private void tbNotes_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbNotes.Text = dsUser1.tbUserInfo.Rows[RecordPos]["Notes"].ToString();
}
private void tbDate_DataBinding(object sender, System.EventArgs e)
{
int RecordPos = (int) Session["RecordPos"];
tbDate.Text = dsUser1.tbUserInfo.Rows[RecordPos]["EnterDate"].ToString();
}
//删除
private void btnDelete_Click(object sender, System.EventArgs e)
{
string strSql = "Delete tbUserInfo where username='"+tbName.Text+"'";
ExcuteSql(strSql);
}
//更新
private void btnUpdate_Click(object sender, System.EventArgs e)
{
string strSql = "UPDATE tbUserInfo "+
"SET " +
"UserPass ='"+tbPass.Text+"', "+
"Sex ='"+tbSex.Text+"'," +
"EnterDate ='"+tbDate.Text+"'," +
"Zhiwei ='"+tbZhiWei.Text+"'," +
"Notes ='" + tbNotes.Text + "'" +
" WHERE UserName ='"+tbName.Text+"'";
ExcuteSql(strSql);
}

有关存储过程
//执行存储过程
private void btnDataReader_Click(object sender, System.EventArgs e)
{
//建立Table，用来存放查询的结果
DataTable table = new DataTable("Test");
//为表格添加列
table.Columns.Add("EmployeeID");
table.Columns.Add("OrderDate");
table.Columns.Add("RequiredDate");
//执行查询
SqlDataReader rdrEmployees;
sqlConnection.Open();//打开数据库连接
rdrEmployees = sqlCommand.ExecuteReader();//执行语句
//以下读取数据
DataRow dr;
while(rdrEmployees.Read())
{
dr = table.NewRow();//新建一行
//对当前行每一列赋值
dr[0] = rdrEmployees.GetInt32(0);
dr[1] = rdrEmployees.GetDateTime(1);
dr[2] = rdrEmployees.GetDateTime(2);
table.Rows.Add(dr);//添加当前行
}
//以下设置数据源
sqlConnection.Close();//关闭连接
dataGridReader.DataSource = table;//设置数据源，显示数据
dataGridReader.DataBind();
}

//执行带参数的存储过程
private void Button1_Click(object sender, System.EventArgs e)
{
//建立Table，用来存放查询的结果
DataTable table = new DataTable("Test");
//为表格添加列
table.Columns.Add("OrderID");
table.Columns.Add("OrderDate");
table.Columns.Add("RequreDate");
table.Columns.Add("ShippedDate");
//执行查询
SqlDataReader rdrEmployees;
sqlConnection.Open();//打开数据库连接
sqlCommand1.Parameters["@CustomerID"].Value = "VICTE";
sqlCommand1.Parameters["@RETURN_VALUE"].Value = 1;
rdrEmployees = sqlCommand1.ExecuteReader();//执行语句
//以下读取数据
DataRow dr;
while(rdrEmployees.Read())
{
dr = table.NewRow();//新建一行
//对当前行每一列赋值
dr[0] = rdrEmployees.GetInt32(0);
dr[1] = rdrEmployees.GetDateTime(1);
dr[2] = rdrEmployees.GetDateTime(2);
dr[3] = rdrEmployees.GetDateTime(3);
table.Rows.Add(dr);//添加当前行
}
//以下设置数据源
sqlConnection.Close();//关闭连接
dataGridReader.DataSource = table;//设置数据源，显示数据
dataGridReader.DataBind();
}