用户输入文本后如何对组合框进行排序

Question

我有组合框，用户可以在其中输入文本或从列表中输入 select。当用户输入他们自己的文本时，而不是它显示在下拉列表的底部或顶部，我希望它以正确的顺序出现。例如，如果用户输入 24，我希望它出现在 20 到 30 之间。

private void LoadComboBox()
    {
        if (ddlTypeUnits.SelectedValue == "HP")
        {
            MotorSizeThreePhase[] motors = MotorSizeThreePhaseFactory.GetList(ActingMotorType, IsHPorBTU, IsAC, true, Common.GetConnectionString());

            cmbOutputRating.DataSource = motors;
            cmbOutputRating.DataTextField = "MotorSizeHP";
            cmbOutputRating.DataValueField = "MotorSizeHP";
            cmbOutputRating.DataBind();

        }

        ThreePhaseMotorLoad curLoad = (ThreePhaseMotorLoad)this.LoadObject;
        ListItem item = new ListItem(curLoad.Size.ToString()); //gets the stored size value
        if (!cmbOutputRating.Items.Contains(item))  //add the size value to the dropdown list
        {
            cmbOutputRating.DataBind();
            cmbOutputRating.Items.Add(item);
            cmbOutputRating.Text = curLoad.Size.ToString();
        }
    }

Answer 1

C# - is it possible to arrange ComboBox Items from a to z?

如果您使用的是 Win Forms，只需使用 ComboBox.Sorted = true;

如果你的组合框中的数据来自于列表的形式，那么在你要放入组合框的数据列表中使用OrderBy，然后再放入它。示例：

    List<string> a = new List<string>()
    {
        "q",
        "w",
        "e",
        "r",
        "t",
        "y",
        "u",
        "i",
        "o",
        "p",
        "a",
        "s",
        "d",
        "f",
        "g",
        "h",
        "j",
        "k",
        "l",
        "z",
        "x",
        "c",
        "v",
        "b",
        "n",
        "m",
    };

    comboBox1.Items.AddRange(a.OrderBy(c => c).ToArray());

Answer 2

我没有执行 items.add() 并将项目附加到列表底部，而是将项目插入到正确的索引中。

            int newItemIndex = 0;
            foreach (ListItem li in cmbOutputRating.Items)
            {

                if (Convert.ToDouble(li.Value) < curLoad.Size)
                {
                    newItemIndex++;
                }
            }

            cmbOutputRating.Items.Insert(newItemIndex, curLoad.Size.ToString());

用户输入文本后如何对组合框进行排序

How do I sort a combobox after a user inputs text

c#

asp.net

combobox