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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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