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我正在做一個項目，我正在做彈出式菜單和彈出式菜單，當我彈出數據從網格獲取填充到文本框/下拉菜單，但發生了什麼是我有一個類別的下拉菜單和另一個下拉作爲子類別，我想要的是當我選擇類別相關的子類別獲取填寫子類別下拉列表，但是發生了什麼是所有子類別都會自動填充。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>
後面正確穿上ASPX或不活動的
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);
}
}
你的代碼前面看起來不錯，請粘貼相關的後臺代碼。 – 2013-04-22 11:29:32