因爲之前有個CSDN的賬號但是後來賬號丟了，於是只能另起爐竈，今天總有找回了丟失已久的登錄祕密，不知道有沒有辦法將兩個博客合併，只能手動複製黏貼以前的博文過來。。。悲慘
源地址：http://blog.csdn.net/sxfenglei/article/details/5431181 該博客不再用了
現在看看當年寫的代碼 真幼稚呵呵 轉過來紀念下當年的稚嫩，哈哈
/// <summary>
/// Page.Load 加載時 使用!IsPostBack 判斷是否回顯
/// </summary>
if (!IsPostBack)// !IsPostBack 獲取一個值，該值指示該頁是否正爲響應客戶端回發而加載，或者它是否正被首次加載和訪問
//==================================連接數據庫 增刪改查==================================
/// <summary>
/// 在 web.config中配置數據庫字符串
/// </summary>
<appSettings>
<add key="ConnectionString" value="Data Source=ASUS/SQLEXPRESS;Initial Catalog=MyDB;Integrated Security=True"/>
</appSettings>
/// <summary>
/// 獲取 Web.Config 配置文件中與數據庫連接的字符串
/// </summary>
public SqlConnection GetConnection()
{
string sqlconString = ConfigurationManager.AppSettings["ConnectionString"].ToString();
SqlConnection con = new SqlConnection(sqlconString);
return con;
}
/// <summary>
/// 編寫 填充方法
/// </summary>
private void fillDataGridView()
{
//將方法賦值給con 等同於SqlConnection con = new SqlConnection(sqlconString);
SqlConnection con = GetConnection();
con.Open();
//拼SQL語句
string sql = "select * from yuanGong";
//創建 Command
SqlCommand com = new SqlCommand(sql, con);
//創建 DataAdapter
SqlDataAdapter dataAdapter = new SqlDataAdapter(com);
//創建 DataSet
DataSet dataSet = new DataSet();
//填充 DataSet
dataAdapter.Fill(dataSet);
//填充 GridView 控件
GridView1.DataSource = dataSet;
//將數據綁定到 GridView 控件
GridView1.DataBind();
//釋放資源
dataAdapter.Dispose();
dataSet.Dispose();
con.Close();
}
/// <summary>
/// 按照條件查詢數據
/// </summary>
//如果文本框不爲空(進行查詢) 如果文本框爲空(填充所有數據)
if(this.TextBox1.Text!="")
{
//創建 Connection 對象
SqlConnection con = GetConnection();
con.Open();
//拼SQL
string sql = "select * from yuanGong where name=@name";
//創建 Command 對象
SqlCommand com = new SqlCommand(sql,con);
//
com.Parameters.Add("@name", SqlDbType.VarChar, 20).Value = this.TextBox1.Text.Trim();
//創建 DataAdapter 對象
SqlDataAdapter dataAdpater = new SqlDataAdapter(com);
//創建 DataSet 對象
DataSet dataSet = new DataSet();
//填充 dataSet
dataAdpater.Fill(dataSet);
//判斷是否查到數據
if (dataSet.Tables[0].Rows.Count > 0)
{
//填充 GridView
GridView1.DataSource = dataSet;
//綁定數據到 GridView
GridView1.DataBind();
}
else
{
Response.Write("<script>alert('報告馮磊老大，沒有相關記錄！')</script>");
}
//釋放資源佔用
dataAdpater.Dispose();
dataSet.Dispose();
con.Close();
}else{
this.fillDataGridView();//調用自定義方法 填充所有數據
}
/// <summary>添加數據
/// 添加數據
/// </summary>
if(TextBox1.Text.Trim()!="")
{
SqlConnection con = GetConnection();
string sql = "insert into yuanGong (Name) values ( '"+this.TextBox1.Text.Trim()+" ')";//特別聲明：‘this.TextBox1.Text.Trim()’ 應放在單引號中
SqlCommand com = new SqlCommand(sql,con);
con.Open();
com.ExecuteNonQuery();
con.Close();
this.fillDataGridView();
}else{
this.fillDataGridView();
}
/// <summary>修改數據
/// 編輯
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
//
GridView1.EditIndex = e.NewEditIndex;
//重新加載 GridView
this.fillDataGridView();
}
/// <summary>更新 按鍵 GridView RowUpdating 方法
/// 更新
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//拿到值
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
string name = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString();
string age = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString();
string gongZi = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[5].Controls[0])).Text.ToString();
string jiGuan = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[7].Controls[0])).Text.ToString();
//拼SQL
string sql = string.Format("update yuanGong set Name='{0}',Age='{1}',gongZi='{2}',jiGuan='{3}' where ID='{4}'", name,age,gongZi,jiGuan,id);
//創建 connection 對象
SqlConnection con = GetConnection();
//打開數據庫連接
con.Open();
//創建 command 對象
SqlCommand com = new SqlCommand(sql,con);
//執行SQL
com.ExecuteNonQuery();
//釋放資源
com.Dispose();
con.Close();
//
GridView1.EditIndex = -1;
//重新加載 GridView
this.fillDataGridView();
}
/// <summary>取消按鍵 GridView 的 RowCancelingEdit 方法
/// 取消
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
//重新加載 GridView
this.fillDataGridView();
}
/// <summary>刪除數據
/// 刪除數據
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//拿到 ID
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
//拼SQL
string sqlStr = "delete from yuanGong where ID=" + id;
SqlConnection myConn = GetConnection();
myConn.Open();
SqlCommand myCmd = new SqlCommand(sqlStr, myConn);
myCmd.ExecuteNonQuery();
myCmd.Dispose();
myConn.Close();
GridView1.EditIndex = -1;
this.fillDataGridView();
}
/// <summary>彈出窗口詢問是否刪除
/// 彈出窗口詢問是否刪除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//
if (e.Row.RowType == DataControlRowType.DataRow)
{
((LinkButton)e.Row.Cells[0].Controls[0]).Attributes.Add("onclick", "return confirm('馮磊老大你確定要刪除我嗎?')");
}
}