C# 如何在中继器内更改选择时获取dropdownlist的值。
我在转发器中有四列,Expected,Accpet,DDL&一个面板在页面加载时不可见 若Expect列值和下拉选择值相同,那个么只有我想显示该面板,否则不显示 请帮助我,我没有得到dropdownlist的值,因为在选择更改时,整个中继器正在重新填充,我无法得到一个值。 有人能帮我吗 任何可能的办法都可以 CSSC# 如何在中继器内更改选择时获取dropdownlist的值。,c#,asp.net,C#,Asp.net,我在转发器中有四列,Expected,Accpet,DDL&一个面板在页面加载时不可见 若Expect列值和下拉选择值相同,那个么只有我想显示该面板,否则不显示 请帮助我,我没有得到dropdownlist的值,因为在选择更改时,整个中继器正在重新填充,我无法得到一个值。 有人能帮我吗 任何可能的办法都可以 CSS <style> .main { width: 100%; } .inner
<style>
.main
{
width: 100%;
}
.inner
{
width: 90%;
}
.fst
{
width: 20%;
float: left;
}
.scnd
{
width: 20%;
float: left;
}
.thrd
{
width: 20%;
float: left;
}
.frth
{
width: 20%;
float: left;
}
.reset-this
{
clear:both;
}
</style>
梅因先生
{
宽度:100%;
}
内部的
{
宽度:90%;
}
.fst
{
宽度:20%;
浮动:左;
}
.scnd
{
宽度:20%;
浮动:左;
}
thrd先生
{
宽度:20%;
浮动:左;
}
.第一
{
宽度:20%;
浮动:左;
}
.重置这个
{
明确:两者皆有;
}
HTML
<div class="main">
<div class="inner">
<div class="fst">
Except
</div>
<div class="scnd">
Accpet
</div>
<div class="thrd">
DDL
</div>
<div class="frth">
Panel
</div>
<div class="reset-this">
</div>
</div>
<div class="reset-this">
</div>
<br />
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound">
<ItemTemplate>
<div class="inner">
<div class="fst">
<asp:Label ID="Label1" runat="server" Text='<%# Eval("Expected") %>'></asp:Label>
</div>
<div class="scnd">
<asp:Label ID="Label2" runat="server" Text='<%# Eval("accpet") %>'></asp:Label>
</div>
<div class="thrd">
<asp:DropDownList ID="DropDownList3" AutoPostBack="true" runat="server" OnSelectedIndexChanged="DropDownList3_SelectedIndexChanged">
<asp:ListItem Text="Select" Value="-1"></asp:ListItem>
<asp:ListItem Text="50"></asp:ListItem>
<asp:ListItem Text="51"></asp:ListItem>
<asp:ListItem Text="52"></asp:ListItem>
<asp:ListItem Text="53"></asp:ListItem>
<asp:ListItem Text="100"></asp:ListItem>
</asp:DropDownList>
</div>
<div class="frth">
<asp:Panel ID="Panel1" runat="server">
<asp:DropDownList ID="DropDownList2" runat="server">
<asp:ListItem Text="Succesful"></asp:ListItem>
</asp:DropDownList>
</asp:Panel>
</div>
<div class="reset-this">
</div>
<br />
</div>
</ItemTemplate>
</asp:Repeater>
</div>
除了
阿克佩特
DDL
面板
代码隐藏
protected void Page_Load(object sender, EventArgs e)
{
GetDAtaset();
}
public void GetDAtaset()
{
DataSet ds = new DataSet();
DataTable dt = new DataTable("warehouseTable");
dt.Columns.Add(new DataColumn("Expected", typeof(string)));
dt.Columns.Add(new DataColumn("accpet", typeof(string)));
DataRow dr = dt.NewRow();
dr["Expected"] = "100";
dr["accpet"] = "50";
dt.Rows.Add(dr);
DataRow dr1 = dt.NewRow();
dr1["Expected"] = "50";
dr1["accpet"] = "25";
dt.Rows.Add(dr1);
ds.Tables.Add(dt);
Repeater1.DataSource = ds;
Repeater1.DataBind();
}
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
((Panel)(e.Item.FindControl("panel1"))).Visible = false;
}
protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
{
for (int i = 0; i < Repeater1.Items.Count; i++)
{
Panel pnl_active = Repeater1.Items[i].FindControl("panel1") as Panel;
Label Expected = Repeater1.Items[i].FindControl("Label1") as Label;
DropDownList DDLValue = Repeater1.Items[i].FindControl("DropDownList3") as DropDownList;
if (DDLValue.SelectedItem.ToString() == Expected.ToString())
{
pnl_active.Visible = true;
}
}
}
受保护的无效页面加载(对象发送方,事件参数e)
{
GetDAtaset();
}
public void GetDAtaset()
{
数据集ds=新数据集();
DataTable dt=新数据表(“仓库表”);
添加(新的数据列(“预期”,类型为(字符串));
添加(新数据列(“accpet”,typeof(string));
DataRow dr=dt.NewRow();
dr[“预期”]=“100”;
dr[“accpet”]=“50”;
dt.Rows.Add(dr);
DataRow dr1=dt.NewRow();
dr1[“预期”]=“50”;
dr1[“accpet”]=“25”;
dt.行。添加(dr1);
ds.Tables.Add(dt);
Repeater1.DataSource=ds;
Repeater1.DataBind();
}
受保护的void Repeater1\u ItemDataBound(对象发送方,RepeaterItemEventArgs e)
{
((面板)(如Item.FindControl(“panel1”))。可见=假;
}
受保护的void DropDownList3\u SelectedIndexChanged(对象发送方,事件参数e)
{
对于(int i=0;i
您需要做两件事:
首先,在您的页面加载
方法中添加此选项,以避免重置中继器的值:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GetDAtaset();
}
}
接下来,将DropDownList3\u SelectedIndexChanged
方法修改如下:
protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
{
for (int i = 0; i < Repeater1.Items.Count; i++)
{
Panel pnl_active = Repeater1.Items[i].FindControl("panel1") as Panel;
Label Expected = Repeater1.Items[i].FindControl("Label1") as Label;
DropDownList DDLValue = Repeater1.Items[i].FindControl("DropDownList3") as DropDownList;
//You need to compare the SelectedItem.Text with the label Expected.Text
if (DDLValue.SelectedItem.Text == Expected.Text)
{
pnl_active.Visible = true;
}
}
}
protectedvoid DropDownList3\u SelectedIndexChanged(对象发送方,事件参数e)
{
对于(int i=0;i
请注意,您将DDLValue.SelectedItem与预期的标签进行比较,这是不正确的,因为您需要将DDLValue.SelectedItem.Text与标签预期的.Text进行比较
希望这有帮助。但是如果我正在解除监听,那么我发现选择更改事件没有被触发。即使在加载页面中添加(!IsPostBack)后,它仍然没有触发吗?