C# 在Asp.NETWeb应用程序中，如何在服务器端获取占位符内控件的Id？

我正在开发asp.net web应用程序。我使用占位符ans用户控件在一个页面中动态创建控件。占位符中有多个文本框

我在for循环中运行这段代码

phSchemaEMITenureDetails.Controls.Add(LoadControl("~/UserControl/SchemaEMITenureDetails.ascx"));

也就是说，我想创建多组这样的文本框

一切正常，但现在我想获取用户在服务器端的这些文本框中输入的文本数据。所以我需要服务器端这些控件的Id

我没办法弄到。请帮帮我

用户控制：

    <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SchemaEMITenureDetails.ascx.cs" Inherits="PaymentControllerGUI.SchemaEMITenureDetails" %>
<asp:Label runat="server" ID="SchemaRowName"></asp:Label>
<asp:Table runat="server">
    <asp:TableRow runat="server" ID="SchemaEMITenure03MonthRow" Style="display: none;">
        <asp:TableCell>
            <asp:Label runat="server" Text="EMI 03 Months" ID="SchemaEMITenure03MonthLabel">
            </asp:Label>
        </asp:TableCell>
        <asp:TableCell>
<asp:TextBox runat="server" ID="SchemaEMITenure03MonthTextBox">
</asp:TextBox>
        </asp:TableCell>
    </asp:TableRow>

    <asp:TableRow runat="server" ID="SchemaEMITenure06MonthRow" Style="display: none;">
        <asp:TableCell>
            <asp:Label runat="server" Text="EMI 06 Months" ID="SchemaEMITenure06MonthLabel">
            </asp:Label>
        </asp:TableCell>
        <asp:TableCell>
            <asp:TextBox ID="SchemaEMITenure06MonthTextBox" runat="server">
            </asp:TextBox>
        </asp:TableCell>
    </asp:TableRow>

    <asp:TableRow runat="server" ID="SchemaEMITenure09MonthRow" Style="display: none;">
        <asp:TableCell>
            <asp:Label runat="server" Text="EMI 09 Months" ID="SchemaEMITenure09MonthLabel">

            </asp:Label>
        </asp:TableCell>
        <asp:TableCell>
            <asp:TextBox ID="SchemaEMITenure09MonthTextBox" runat="server">
            </asp:TextBox>
        </asp:TableCell>
    </asp:TableRow>

    <asp:TableRow runat="server" ID="SchemaEMITenure12MonthRow" Style="display: none;">
        <asp:TableCell>
            <asp:Label runat="server" Text="EMI 12 Months" ID="SchemaEMITenure12MonthLabel">
            </asp:Label>
        </asp:TableCell>
        <asp:TableCell>
            <asp:TextBox ID="SchemaEMITenure12MonthTextBox" runat="server">
            </asp:TextBox>
        </asp:TableCell>
    </asp:TableRow>

</asp:Table>

第Aspx页：

<asp:PlaceHolder ID="phSchemaEMITenureDetails" runat="server"></asp:PlaceHolder>

---

Page Aspx.cs:phSchemaEMITenureDetails.Controls.AddLoadControl~/UserControl/SchemaEMITenureDetails.ascx

像这样更新ypur ascx文件只需为表添加ID

  <asp:Table runat="server" ID="tbl">
        <asp:TableRow runat="server" ID="SchemaEMITenure03MonthRow" Style="display: none;">
            <asp:TableCell>
                <asp:Label runat="server" Text="EMI 03 Months" ID="SchemaEMITenure03MonthLabel">
                </asp:Label>
            </asp:TableCell>
            <asp:TableCell>
    <asp:TextBox runat="server" ID="SchemaEMITenure03MonthTextBox">
    </asp:TextBox>.... 

如果文本框位于其他文本框中，则必须使用findcontrol方法 控制 只需使用父控件的id，然后应用Findcontrol。如果您的内部有多个父控件，则必须像这样多次使用Findcontrol

字符串值=TopParent.FindControlInnerParent.FindControlTextBox作为TextBox.Text

在本例中，文本框位于两个父对象的内部，如下所示

至高无上的 内亲 文本框

---

如果控件是文本框，请尝试查看控件并获取值：

System.Text.StringBuilder result = new System.Text.StringBuilder();

protected void cmdOK_Click(object sender, EventArgs e)
{
    this.GetValues(this.phSchemaEMITenureDetails, this.result);
    this.litResult.Text = this.result.ToString();
}

private void GetValues(Control control, System.Text.StringBuilder strBuilder)
{         

    if(control.HasControls())
    {
        foreach (Control item in control.Controls)
        {
            if (item is TextBox)
            {
                TextBox cntrl = (TextBox)item;
                strBuilder.AppendLine(cntrl.ID.ToString() + " = " + cntrl.Text + "<br/>");
            }

            if (item.HasControls())
            {
                this.GetValues(item, strBuilder);
            }
        }  
    }
}

我很确定您可以在这段代码中做一些改进。但这是我想到的解决你问题的办法

System.Text.StringBuilder result = new System.Text.StringBuilder();

protected void cmdOK_Click(object sender, EventArgs e)
{
    this.GetValues(this.phSchemaEMITenureDetails, this.result);
    this.litResult.Text = this.result.ToString();
}

private void GetValues(Control control, System.Text.StringBuilder strBuilder)
{         

    if(control.HasControls())
    {
        foreach (Control item in control.Controls)
        {
            if (item is TextBox)
            {
                TextBox cntrl = (TextBox)item;
                strBuilder.AppendLine(cntrl.ID.ToString() + " = " + cntrl.Text + "<br/>");
            }

            if (item.HasControls())
            {
                this.GetValues(item, strBuilder);
            }
        }  
    }
}