DropDownList绑定数据源的方法[通俗易懂]

编程汇总 • 2025-04-09 21:33 • 阅读 76

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 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;
}
}

DropDownList绑定数据源的方法[通俗易懂]

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