下拉列表绑定
下拉列表框里面用数椐库里的"分类"记录进行了绑定:
Dim dr As SqlDataReader
dr = comm.ExecuteReader
dropdown.DataSource = dr
dropdown.DataTextField = "分类"
dropdown.DataBind()
dr.Close()
comm已经定义好.数椐库的绑定也是正确的.但是我现在要在dropdown 的第一项里面加入"所有类别"且默认为选定的.其后才是数椐库里面的"分类"字段.我该怎么做呢?
-------
Dim dr As SqlDataReader
dr = comm.ExecuteReader
dropdown.DataSource = dr
dropdown.DataTextField = "分类"
dropdown.DataBind()
dr.Close()
DropDownList1.Items.Insert(0 , "所有类别")
DropDownList1.SelectedIndex = 0
Dim dr As SqlDataReader
dr = comm.ExecuteReader
dropdown.DataSource = dr
dropdown.DataTextField = "分类"
dropdown.DataBind()
dr.Close()
comm已经定义好.数椐库的绑定也是正确的.但是我现在要在dropdown 的第一项里面加入"所有类别"且默认为选定的.其后才是数椐库里面的"分类"字段.我该怎么做呢?
-------
Dim dr As SqlDataReader
dr = comm.ExecuteReader
dropdown.DataSource = dr
dropdown.DataTextField = "分类"
dropdown.DataBind()
dr.Close()
DropDownList1.Items.Insert(0 , "所有类别")
DropDownList1.SelectedIndex = 0