Dropdownlist无法在UpdatePanel内部更新? [英] Dropdownlist not updating inside UpdatePanel?
本文介绍了Dropdownlist无法在UpdatePanel内部更新?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个ASP网站.我想在更改下拉列表时更新文本框.但是我不使用自动回发.Dropdownlist在数据库中获取值,然后将这些值写入文本框.如何在updatePanel内部进行操作?
I have a asp web site. I want to update textboxes while change dropdownlist. But I don't use autopostback. Dropdownlist getting values in database and I'm writing into textbox this values.How can I do inside updatePanel?
index.aspx
index.aspx
<div class="col-sm-8">
<asp:DropDownList ID="drp_MalAd" Width="130px" CssClass="form-control center-block" runat="server" AutoPostBack="true" DataSourceID="SqlDataSourceMalAd" DataTextField="MALAD" DataValueField="MALAD" OnSelectedIndexChanged="drp_MalAd_SelectedIndexChanged"></asp:DropDownList>
<asp:SqlDataSource runat="server" ID="SqlDataSourceMalAd" ConnectionString='<%$ ConnectionStrings:... %>' SelectCommand="SELECT ..."></asp:SqlDataSource>
</div>
还有我的index.aspx.cs代码:
And My index.aspx.cs code:
protected void drp_MalAd_SelectedIndexChanged(object sender, EventArgs e)
{
string malAdi = drp_MalAd.SelectedItem.Text.ToString();
SqlDataReader reader;
SqlCommand cmd = new SqlCommand("SELECT .. WHERE MALAD='" + malAdi + "'", con);
SqlCommand cmd1 = new SqlCommand("SELECT ...WHERE MALAD='" + malAdi + "'", con);
SqlCommand cmd2 = new SqlCommand("SELECT ... WHERE MALAD='" + malAdi + "'", con);
SqlCommand cmd3 = new SqlCommand("SELECT ... WHERE MALAD='" + malAdi + "'", con);
try
{
con.Open();
txt_AnaBirim.Text = cmd.ExecuteScalar().ToString();
txt_malKodu.Text = cmd1.ExecuteScalar().ToString();
txt_KDVOranim.Text = cmd2.ExecuteScalar().ToString();
con.Close();
}
catch (Exception)
{
}
try
{
con.Open();
reader = cmd3.ExecuteReader();
grd_StokDurumu.DataSource = reader;
grd_StokDurumu.DataBind();
reader.Close();
}
catch
{
}
finally
{
con.Close();
}
}
推荐答案
您将要更新的所有内容都包裹在 UpdatePanel
You wrap everything you want to update without a PostBack inside an UpdatePanel
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DropDownList ID="drp_MalAd" Width="130px" CssClass="form-control center-block" runat="server" AutoPostBack="true" DataSourceID="SqlDataSourceMalAd" DataTextField="MALAD" DataValueField="MALAD" OnSelectedIndexChanged="drp_MalAd_SelectedIndexChanged"></asp:DropDownList>
<asp:SqlDataSource runat="server" ID="SqlDataSourceMalAd" ConnectionString='<%$ ConnectionStrings:... %>' SelectCommand="SELECT ..."></asp:SqlDataSource>
<asp:TextBox ID="txt_AnaBirim" runat="server"></asp:TextBox>
<asp:TextBox ID="txt_malKodu" runat="server"></asp:TextBox>
<asp:TextBox ID="txt_KDVOranim" runat="server"></asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
并且您需要在页面上添加 ScriptManager
.
And you need to add a ScriptManager
to the page.
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
这篇关于Dropdownlist无法在UpdatePanel内部更新?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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