ASP.NET後台頁面修改集錦

（1）下拉添加“==請選擇==”

解決方案：

1.

protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                DataSet ds = new DataSet();                string tablename = "department_Info";                ds = GetDataSet(ds, tablename);                this.ddl_post.DataSource = ds;                ddl_post.DataTextField = "departmentName";                ddl_post.DataValueField = "departmentName";                this.ddl_post.DataBind();                          //添加到第1行                this.ddl_department.Items.Insert(0,"==請選擇==");                this.ddl_department.Items.FindByText("==請選擇==").Selected = true;
            }

2.

protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                DataSet ds = new DataSet();                string tablename = "department_Info";                ds = GetDataSet(ds, tablename);                this.ddl_post.DataSource = ds;                ddl_post.DataTextField = "departmentName";                ddl_post.DataValueField = "departmentName";                this.ddl_post.DataBind();                DataTable dt = ds.Tables[0];                DataRow dr = dt.NewRow();                dr[0] = "==請選擇==";                //添加到第1行                dt.Rows.InsertAt(dr, 0);                this.ddl_post.DataSource = dt;            }

（2）修改頁面讀不出來的時候

 

需要綁定資料來源

 

 

（3）時間轉換問題

修改頁面時間轉換格式為 2010/01/01

解決方案：

 

gridview中時間轉換格式為 2010/01/01

解決方案：