DropDownList控件绑定数据源的三种方法

 this.ddltype.DataTextField = "btName";//显示的值 this.ddltype.DataValueField = "btId";//获取dropdownlist中的值 ddltype.DataSource = service.GetBusinessTypeAll(""); this.ddltype.DataBind();

 DataTable dt_GetBusinessName = service.GetBusinessTypeAll(""); //表中无数据的话直接返回 if (dt_GetBusinessName == null) return; for (int i = 0; i 

 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { this.TextBox1.Text = this.DropDownList1.SelectedItem.Text.ToString(); }

 protected void ddl_bumen_SelectedIndexChanged(object sender, EventArgs e) { if (this.ddl_bumen.Text != "选择部门") { int id = Int32.Parse(this.ddl_bumen.Text); SqlParameter bumen = new SqlParameter("@dept_id", id); IList list = BLLGeneric.Select(CommandType.StoredProcedure, "lb_liandong", bumen); //配置数据源 this.ddl_em.DataSource = list; //绑定字段属性 this.ddl_em.DataTextField = "Em_name"; this.ddl_em.DataValueField = "Em_name"; //绑定控件 this.ddl_em.DataBind(); } else { this.Response.Write(string.Format(GetRedirect.WINALERT, "请选择部门")); this.ddl_bumen.Focus(); return; } }

 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();

 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("alert('" + ex.Message.ToString() + "')"); } finally { conn.Close(); } } }

 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); //开始读取数据 Conn.Open(); DataSet dataSet = new DataSet(); myAdapter.Fill( dataSet,"Table1" ); Conn.Close(); //开始绑定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();

 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())); }