ASP.NET后台页面修改集锦

（1）下拉添加“==请选择==”

解决方法：

1.

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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,"==请选择==");                 this.ddl_department.Items.FindByText("==请选择==").Selected = true;<br>            }

2.

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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] = "==请选择==";                 //添加到第1行                 dt.Rows.InsertAt(dr, 0);                 this.ddl_post.DataSource = dt;             }

（2）修改页面读不出来的时候

 

需要绑定数据源

 

 

（3）时间转换问题

修改页面时间转换格式为 2010/01/01

解决方法：

 

gridview中时间转换格式为 2010/01/01

解决方法：