动态绑定方法一：动态绑定数据库中的字段。 SqlConnection conn = UtilitySqlClass.OperateDataBase.ReturnConn();
string strSQL = "select * from CompanyType";
SqlDataAdapter ada = new SqlDataAdapter(strSQL, conn);
DataSet ds = new DataSet();
ada.Fill(ds, "CompanyType");
DropDownList1.DataSource = ds.Tables["CompanyType"].DefaultView;
DropDownList1.DataValueField = ds.Tables["CompanyType"].Columns[1].ColumnName;
DropDownList1.DataTextField = ds.Tables["CompanyType"].Columns[1].ColumnName;
DropDownList1.DataBind();
ds.Dispose(); 动态绑定方法二：利用DropDownList.Items.Add方法。 protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlConnection conn = UtilitySqlClass.OperateDataBase.ReturnConn();
try
{
conn.Open();
this.DropDownList1.Items.Add("");
string strSQL = "select CompanyType from CompanyType";
SqlCommand com = new SqlCommand(strSQL, conn);
SqlDataReader dr = com.ExecuteReader();
while (dr.Read())
{
this.DropDownList1.Items.Add(dr["CompanyType"].ToString());
}
}
catch (Exception ex)
{
Response.Write("<scirpt>alert('" + ex.Message.ToString() + "')</script>");
}
finally
{
conn.Close();
}
}
}
第一种方法：
string ConnString = ConfigurationSettings.AppSettings["ConnectionString"];
//创建一个SqlConnection
SqlConnection Conn = new SqlConnection( ConnString ); string SQL_Select = "select id, ItemName from DDLItem order by id desc"; //构造一个SqlDataAdapter SqlDataAdapter myAdapter = new SqlDataAdapter( SQL_Select, Conn); //開始读取数据 Conn.Open(); DataSet dataSet = new DataSet(); myAdapter.Fill( dataSet,"Table1" ); Conn.Close(); //開始绑定DropDownList //指定DropDownList使用的数据源 DropDownList1.DataSource = dataSet.Tables["Table1"].DefaultView; //指定DropDownList使用的表里的那些字段 DropDownList1.DataTextField = "ItemName"; //dropdownlist的Text的字段 DropDownList1.DataValueField = "id";//dropdownlist的Value的字段 DropDownList1.DataBind(); 另外一种方法：
con.Open();
SqlCommand cmd = new SqlCommand(strSql,con);
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
DropDownList1.Items.Add(new ListItem(dr["status"].ToString(), dr["status_Id"].ToString()));
}
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