Question

我在一个面板中有16个文本框。我正在尝试创建一个按钮，清除每个框中的所有文本。目前我正在使用txtbox.text = ""选项，但必须有更好的方法来实现它。

我尝试过使用panel.controls.clear()，但这似乎也不起作用。

<asp:Panel ID="pnlAddNewPeopleRecord" runat="server" Visible="false">
    <asp:Label ID="lblAddNewPeopleRecord" runat="server" Visible="true">Add To People Table</asp:Label>
    <asp:Table runat="server" class="tblAddNewRecord">
        <asp:TableRow>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">ID</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeoplePersonID"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">First Name</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleFirstName"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Middle Initial</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleMiddleInitial"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Last Name</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleLastName"></asp:TextBox>
            </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Street 1</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleStreet1"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Street 2</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleStreet2"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">City</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleCity"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">State</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleState"></asp:TextBox>
            </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Zip Code</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleZipCode"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Country</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleCountry"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Phone 1</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeoplePhone1"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Phone 2</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeoplePhone2"></asp:TextBox>
            </asp:TableCell>
        </asp:TableRow>
        <asp:TableRow>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Fax</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleFax"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Cell Phone</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleCellPhone"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Email</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleEmail"></asp:TextBox>
            </asp:TableCell>
            <asp:TableCell CssClass="tblCell">
                <asp:Label class="tblCellLabel" runat="server">Notes</asp:Label>
                <asp:TextBox class="tblCellTextbox" runat="server" ID="txtbxPeopleNotes"></asp:TextBox>
            </asp:TableCell>
        </asp:TableRow>
    </asp:Table>

    <asp:Button runat="server" class="btnResetRecord" ID="btnAddNewPeopleResetRecords" Text="Reset Fields" OnClick="btnAddNewPeopleResetRecords_Click" />
    <asp:Button runat="server" class="btnAddNewRecord" ID="btnAddNewRecordToPeople" Text="Add Record To People Table" OnClick="btnAddNewRecordToPeople_Click" />
</asp:Panel>

我正在使用下面的代码。当我单击按钮时，页面什么都不做。

protected void btnAddNewPeopleResetRecords_Click(object sender, EventArgs e)
{
    resetAllTextBoxes(pnlAddNewPeopleRecord);
}

private void resetAllTextBoxes(System.Web.UI.WebControls.Panel pnlAddNewPeopleRecord)
{
    foreach(System.Web.UI.Control c in pnlAddNewPeopleRecord.Controls)
    {
        if (c is System.Web.UI.WebControls.TextBox)
        {
            ((System.Web.UI.WebControls.TextBox)c).Text = ""; 
        }
    }
}

Answer 1

如果您想在服务器端执行此操作，那么解决方案是最好的方法。如果linq可供您使用，它可能会被加强。

using System.Web.UI.WebControls;

private void resetAllTextBoxes(Panel pnlAddNewPeopleRecord)
{
    foreach(var control in pnlAddNewPeopleRecord.Controls.OfType<TextBox>())
    {
        control.Text = string.Empty; 
    }
}

或者，如果您不需要回发到服务器，则可以执行此客户端。使用jquery轻松。

<input type="button" value="Clear Textboxes" onclick="ClearTextboxes();" />

<script type="text/javascript">
    function ClearTextboxes()
    {
        $(".tblCellTextbox").val("");
    }
</script>

清除Panel C中表内的所有文本框

1 个答案: