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我正在做一个项目，我正在做弹出式菜单和弹出式菜单，当我弹出数据从网格获取填充到文本框/下拉菜单，但发生了什么是我有一个类别的下拉菜单和另一个下拉作为子类别，我想要的是当我选择类别相关的子类别获取填写子类别下拉列表，但是发生了什么是所有子类别都会自动填充。dropdown onselectingindexchanging doesnot trigger
<table class="panel_table">
<tr style="background-color:#0095E4">
<td colspan="2"><span class="panel_heading1">Category Details</span></td></tr>
<tr class="row1">
<td colspan="2">
<span class="paneltb_column1">BookID--</span>
<asp:Label ID="lblEditbookID" runat="server" Text="book ID"></asp:Label></td>
</tr>
<tr class="row1" >
<td colspan="2">
<span class="paneltb_column2">Book Name</span>
<asp:TextBox CssClass="txtbox1" ID="txtEditbookname" runat="server"></asp:TextBox>
</td></tr>
<tr class="row1" >
<td colspan="2">
<span class="paneltb_column2">Category Name</span>
<asp:DropDownList ID="drp_editcatname" runat="server" Width="120px"
AutoPostBack="true" OnSelectedIndexChanged="drpeditgetvaluesubcategory_onselectinindexchange"> </asp:DropDownList>
</td></tr>
<tr class="row1">
<td colspan="2">
<span class="paneltb_column2">SubCategory Name</span>
<asp:DropDownList ID="drpEditsubcatname" CssClass="txtbox2"
runat="server"> </asp:DropDownList>
</td>
</tr>
<tr class="row1" >
<td colspan="2">
<span class="paneltb_column2">Author Name</span>
<asp:DropDownList ID="drp_editauthorname" runat="server"></asp:DropDownList>
</td>
</tr>
</table>
后面正确穿上ASPX或不活动的
protected void drpgetvaluesubcategory_onselectedindexchange(object sender,EventArgs e)
{
sql = "select subcat_id,subcategoryname from library_subcategory where cat_id='"+drp_categoryname.SelectedItem.Value+"'";
ds = obj.openDataset(sql, Session["SCHOOLCODE"].ToString());
drp_subcategoryname.Items.Clear();
ListItem li = new ListItem();
li.Text = "Select SubCategory";
li.Value = "0";
drp_subcategoryname.Items.Add(li);
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
li = new ListItem();
li.Text = ds.Tables[0].Rows[i]["subcategoryname"].ToString();
li.Value = ds.Tables[0].Rows[i]["subcat_id"].ToString();
drp_subcategoryname.Items.Add(li);
}
}
你的代码前面看起来不错，请粘贴相关的后台代码。 – 2013-04-22 11:29:32