asp.net - 如何清除 Asp.Net 按钮上所有文本框的值单击

Question

我有一个按钮来显示有关客户的记录或信息，问题我刚刚注意到，当我选择一个提供了所有必要信息的客户时，有关该特定客户的信息会正确显示，现在当我尝试显示其他客户时有一些缺失字段的信息，那个时候这个特定客户的缺失字段被以前的客户信息替换，这意味着我需要一种在显示客户信息之前清除文本框的方法。这是我必须显示的方法信息。

public void ShowCustomerInformationCat1()
{
    if (customer.cCustomerType != null)
    {
        ModifyCustomerByCategoryddlCustomerType.SelectedIndex = ModifyCustomerByCategoryddlCustomerType.Items.IndexOf(ModifyCustomerByCategoryddlCustomerType.Items.FindByText(customer.cCustomerType.Trim()));
        ModifyCustomerByCategoryddlNewCustomerType.SelectedIndex = ModifyCustomerByCategoryddlNewCustomerType.Items.IndexOf(ModifyCustomerByCategoryddlNewCustomerType.Items.FindByText(customer.cCustomerType.Trim()));
    }
    if (customer.cInitial != null)
    {
        ModifyCustomerByCategoryddlInitial.SelectedIndex = ModifyCustomerByCategoryddlInitial.Items.IndexOf(ModifyCustomerByCategoryddlInitial.Items.FindByText(customer.cInitial.Trim()));
        ModifyCustomerByCategoryddlNewInitial.SelectedIndex = ModifyCustomerByCategoryddlNewInitial.Items.IndexOf(ModifyCustomerByCategoryddlNewInitial.Items.FindByText(customer.cInitial.Trim()));
    }
    if (customer.cGender != null)
    {
        ModifyCustomerByCategoryddlGender.SelectedIndex = ModifyCustomerByCategoryddlGender.Items.IndexOf(ModifyCustomerByCategoryddlGender.Items.FindByText(customer.cGender.Trim()));
        ModifyCustomerByCategoryddlNewGender.SelectedIndex = ModifyCustomerByCategoryddlNewGender.Items.IndexOf(ModifyCustomerByCategoryddlNewGender.Items.FindByText(customer.cGender.Trim()));
    }
    if (customer.cCountry != null)
    {
        ModifyCustomerByCategoryddlCountry.SelectedIndex = ModifyCustomerByCategoryddlCountry.Items.IndexOf(ModifyCustomerByCategoryddlCountry.Items.FindByText(customer.cCountry.Trim()));
        ModifyCustomerByCategoryddlNewCountry.SelectedIndex = ModifyCustomerByCategoryddlNewCountry.Items.IndexOf(ModifyCustomerByCategoryddlNewCountry.Items.FindByText(customer.cCountry.Trim()));
    }
}

任何人都可以建议我如何清除文本框，我不想单独清除它们。
感谢您的任何建议。

Answer 1

foreach (var item in Page.Controls)
{
    if (item is TextBox)
    {
        ((TextBox)item).Text = "";
    }
}