Question

我有四个下拉列表，在选择asp.net页面文本框字段中的每个下拉列表后应该填写值，在下拉列表页面中选择哪个用户，这里没有SQL业务，对于前者， ddl1包含...虎狮鹿 ddl2包含...西伯利亚RSA纳米比亚 ddl3包含... Carnivore Carnivore Herbivore

如果用户从ddl1选择tiger，从ddl2选择siberia，从ddl3选择cornivore，则textbox字段应更新为，老虎西伯利亚食肉动物我已经使用了StringBuilder和下面的附加类，

        public List<StringBuilder> GetAnimalDetails()
    {
        StringBuilder typo = new StringBuilder();
        typo.Append(DropDownListBranch.SelectedValue);
        typo.Append(" ");
        typo.Append(DropDownListMilestone.SelectedValue);
        typo.Append(" ");
        typo.Append(DropDownListType.SelectedValue);
        typo.Append(" - ");
        typo.Append(DropDownListVersion.SelectedValue);
        return typo.ToString().ToList();

    }

Answer 1

考虑到简单的文本框填充下拉值，您可以尝试类似

的内容

    public string GetAnimalDetails()
    {
        string typo = string.Empty;

        typo = DropDownListBranch.SelectedValue;
        if (!string.IsNullOrEmpty(typo) && !string.IsNullOrEmpty(DropDownListMilestone.SelectedValue))
        {
            typo += " ";
        }
        typo = typo + DropDownListMilestone.SelectedValue;
        if (!string.IsNullOrEmpty(typo) && !string.IsNullOrEmpty(DropDownListType.SelectedValue))
        {
            typo += " ";
        }
        typo = typo + DropDownListType.SelectedValue;
        if (!string.IsNullOrEmpty(typo) && !string.IsNullOrEmpty(DropDownListVersion.SelectedValue))
        {
            typo += " - ";
        }
        typo += DropDownListVersion.SelectedValue;

        return typo;
    }


    protected void DropDownListBranch_SelectedIndexChanged(object sender, EventArgs e)
    {
        txtAnimalDetails.Text = GetAnimalDetails();
    }

    protected void DropDownListMilestone_SelectedIndexChanged(object sender, EventArgs e)
    {
        txtAnimalDetails.Text = GetAnimalDetails();
    }

    protected void DropDownListType_SelectedIndexChanged(object sender, EventArgs e)
    {
        txtAnimalDetails.Text = GetAnimalDetails();
    }

    protected void DropDownListVersion_SelectedIndexChanged(object sender, EventArgs e)
    {
        txtAnimalDetails.Text = GetAnimalDetails();
    }

希望这会有所帮助......

ASP.NET：按用户选择的下拉列表填充文本框字段

1 个答案: