web DropDownList绑定数据源的几种方式 第一种 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(); 第二种 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 < dt_GetBusinessName.Rows.Count; i++) { ddltype.Items.Add(new ListItem(dt_GetBusinessName.Rows[i][“btName”].ToString().Trim(),//显示的值 dt_GetBusinessName.Rows[i][“btId”].ToString().Trim())); }s ddltype.Items.Add(new ListItem(“全部“, “-1”)); ddltype.Text = “全部”;
如何选中DropDownList1中的值用
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { this.TextBox1.Text = this.DropDownList1.SelectedItem.Text.ToString(); }
第三种:
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<lbEmploy> list = BLLGeneric.Select<lbEmploy>(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; } }
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