Question

页: 1 DropDownList . 当你选择<代码>DropDownList的数值时,该数值改变了相应的<代码>TextBox的背景颜色。

To make this easier, I tried to create a Dictionary<TextBox, DropDownList>, but the Key property is System.Web.UI.WebControls.TextBox and the Value property is System.Web.UI.WebControls.DropDownList, instead of TextBox1 and DropDownList1.

如何通过<代码>Dictionary,适当设定TextBox和DropDownList数值?

namespace TextBoxColorPicker
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            get_box_colors();
        }

        protected void get_box_colors()
        {
            var textbox_dict = new Dictionary<TextBox, DropDownList>();

            textbox_dict.Add(TextBox1,DropDownList1);
            textbox_dict.Add(TextBox2,DropDownList2);
            textbox_dict.Add(TextBox3, DropDownList3);

            foreach (KeyValuePair<TextBox, DropDownList> entry in textbox_dict)
            {
                TextBox txtbox = entry.Key;
                DropDownList list = entry.Value;

                Label1.Text = txtbox.ToString();
                Label2.Text = list.ToString();

                if (list.SelectedValue == "R")
                {
                    txtbox.BackColor = System.Drawing.Color.Red;
                }
                else if (list.SelectedValue == "A")
                {
                    txtbox.BackColor = System.Drawing.Color.Gold;
                }
                else if (list.SelectedValue == "G")
                {
                    txtbox.BackColor = System.Drawing.Color.Lime;
                }
                else
                {
                    txtbox.BackColor = System.Drawing.Color.White;
                }
            }
        }
    }
}

Answer 1

从根本上说,这只是关于字典的序号——它指在<条码>上打上<条码>(<>>/条码>,在<条码>上打上<条码>。系统。目的仅填上名称。

It s unclear what you re really trying to do, but it sounds like you want the ID property instead of ToString():

Label1.Text = txtbox.ID;
Label2.Text = list.ID;

在个人方面,我可能不想让这些身份证成为国际不动产业联合会的一部分,但这是一个不同的问题。

Answer 2

这些问题似乎是:

Label1.Text = txtbox.ToString();
Label2.Text = list.ToString();

尝试这样做(如果你重新需要价值观,否则就是指Joon Skeet的回答)。

Label1.Text = txtbox.Text;
Label2.Text = list.SelectedValue;

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