C# 从2列填充的组合框项插入SqlCommand仅一列-SelectedItem

下面的代码在一个项目（combobox中的行）中用两个值填充combobox，现在我只想在DB中插入例如val1（数字9,2）项目，而不插入tval1（字符）。如果我只想根据所选的值在DB中插入val1、val2或val3，SqlCommand INSERT INTO会是什么样子？我知道如何插入简单的填充组合框，但如何设置要插入到DB中的内容

var cb4 = new SqlCommand("SELECT cena1,cena2,cena3,tcena1,tcena2,tcena3 FROM zajezd WHERE akce=" + zakce.Text, spojeni);
 SqlDataReader dr4 = cb4.ExecuteReader();
        while (dr4.Read())
        {
            string val1 = Convert.ToString(dr4["cena1"]);
            string val2 = Convert.ToString(dr4["cena2"]);
            string val3 = Convert.ToString(dr4["cena3"]);
            string tval1 = Convert.ToString(dr4["tcena1"]);
            string tval2 = Convert.ToString(dr4["tcena2"]);
            string tval3 = Convert.ToString(dr4["tcena3"]);

            comboBox4.Items.Add(val1 + " " + tval1);

            comboBox4.Items.Add(val2 + " " + tval2);
            comboBox4.Items.Add(val3 + " " + tval3);

        }
        dr4.Close();
        dr4.Dispose();

        spojeni.Close();

谢谢你花时间阅读这篇文章。我不知道怎么做

这是我插入带有单个值的组合框的代码-

  prikaz.Parameters.AddWithValue("@variable", comboBox1.Text);

我应该如何改进它以仅保存val1？非常感谢您首先， 您必须创建自己的类

public class ComboboxItem
{
    public string val { get; set; }
    public string tval { get; set; }

    public  string DisplayText {get  { return val + " " + tval;}  }
}

然后，更改您的代码：

var cb4 = new SqlCommand("SELECT cena1,cena2,cena3,tcena1,tcena2,tcena3 FROM zajezd WHERE akce=" + zakce.Text, spojeni);
SqlDataReader dr4 = cb4.ExecuteReader();
while (dr4.Read())
    {
        string val1 = Convert.ToString(dr4["cena1"]);
        string val2 = Convert.ToString(dr4["cena2"]);
        string val3 = Convert.ToString(dr4["cena3"]);
        string tval1 = Convert.ToString(dr4["tcena1"]);
        string tval2 = Convert.ToString(dr4["tcena2"]);
        string tval3 = Convert.ToString(dr4["tcena3"]);

        ComboboxItem cbxItem1 = new ComboboxItem();
        cbxItem1.val = val1;
        cbxItem1.tval = tval1;
        comboBox4.Items.Add(cbxItem1);

        ComboboxItem cbxItem2 = new ComboboxItem();
        cbxItem2.val = val2;
        cbxItem2.tval = tval2;
        comboBox4.Items.Add(cbxItem2);

        ComboboxItem cbxItem3 = new ComboboxItem();
        cbxItem3.val = val3;
        cbxItem3.tval = tval3;
        comboBox4.Items.Add(cbxItem3);

        //Set display member and value member
        comboBox1.DisplayMember = "DisplayText";
        comboBox1.ValueMember = "val";
    }
    dr4.Close();
    dr4.Dispose();

    spojeni.Close();

最后，要插入，必须使用组合框的selectedValue：

prikaz.Parameters.AddWithValue("@variable", comboBox1.SelectedValue);

首先,， 您必须创建自己的类

public class ComboboxItem
{
    public string val { get; set; }
    public string tval { get; set; }

    public  string DisplayText {get  { return val + " " + tval;}  }
}

然后，更改您的代码：

var cb4 = new SqlCommand("SELECT cena1,cena2,cena3,tcena1,tcena2,tcena3 FROM zajezd WHERE akce=" + zakce.Text, spojeni);
SqlDataReader dr4 = cb4.ExecuteReader();
while (dr4.Read())
    {
        string val1 = Convert.ToString(dr4["cena1"]);
        string val2 = Convert.ToString(dr4["cena2"]);
        string val3 = Convert.ToString(dr4["cena3"]);
        string tval1 = Convert.ToString(dr4["tcena1"]);
        string tval2 = Convert.ToString(dr4["tcena2"]);
        string tval3 = Convert.ToString(dr4["tcena3"]);

        ComboboxItem cbxItem1 = new ComboboxItem();
        cbxItem1.val = val1;
        cbxItem1.tval = tval1;
        comboBox4.Items.Add(cbxItem1);

        ComboboxItem cbxItem2 = new ComboboxItem();
        cbxItem2.val = val2;
        cbxItem2.tval = tval2;
        comboBox4.Items.Add(cbxItem2);

        ComboboxItem cbxItem3 = new ComboboxItem();
        cbxItem3.val = val3;
        cbxItem3.tval = tval3;
        comboBox4.Items.Add(cbxItem3);

        //Set display member and value member
        comboBox1.DisplayMember = "DisplayText";
        comboBox1.ValueMember = "val";
    }
    dr4.Close();
    dr4.Dispose();

    spojeni.Close();

最后，要插入，必须使用组合框的selectedValue：

prikaz.Parameters.AddWithValue("@variable", comboBox1.SelectedValue);