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http://singlepine.cnblogs.com/articles/265678.html
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http://singlepine.cnblogs.com/articles/301009.html
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http://singlepine.cnblogs.com/articles/257954.html
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C# code:
protected void DropDownListPrevious_SelectedIndexChanged(object sender, EventArgs e)
{
List<ʵÌå> list = BLL.GetDropDownListPreviousChecked(Convert.ToInt32(this.DropDownListPrevious.SelectedValue.ToString()));//×Ô¼ºÐ´¸ù¾ÝDropDownListPreviousÑ¡ÖÐÖµµÃϼ¶DropDownListµÄ¼¯ºÏ
this.DropDownListNext.DataSource = list;
if (this.DropDownListPrevious.SelectedIndex == 0)
{
this.DropDownListNext.Items.Clear();
}
else
{
this.DropDownListNext.DataTextField = "Name";//ÒªÏÔʾµÄ×Ö¶ÎÃû
this.DropDownListNext.DataValueField = "Id"; //ÒªÏÔʾµÄ×ֶζÔÓ¦µÄid(Ψһ)
this.DropDownListNext.DataBind();
}
}
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<td style="height: 38px; width: 35px;">
ÐÕÃû</td>
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select ²¿ÃÅ,ÐÕÃû from tb
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protected void btnLogin_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Server = (local);user id = sa;pwd = 1;database = Login");
&nb ......