从组合框中获取所选值的ID

本文关键字：ID 获取 组合 | 更新日期: 2023-09-27 17:51:08

    private void frmNSS5_Load(object sender, System.EventArgs e)
    {
        SqlConnection con;
        SqlCommand cmd;
        SqlDataReader dr;
        con = new SqlConnection(@"workstation id = PC-PC; user id=sa;Password=sapassword; data source=pc-pc; persist security info=True; initial catalog=CleanPayrollTest2");
        cmd = new SqlCommand("SELECT IsNull(ArEmpName,'') + ' ' + IsNull(ArFatherName,'') + ' ' + IsNull(ArLastName,'') as EmpName, ID as ID FROM [Emp] ", con);
        try
        {
            con.Open();
            dr = cmd.ExecuteReader();
            DataSet ds = new DataSet();
            DataTable dt = new DataTable();
            this.cbEmpName.ValueMember = "ID".ToString();
            this.cbEmpName.DisplayMember = "EmpName";
            this.cbEmpName.DataSource = ds.Tables["EmpName"];
            while (dr.Read())
            {
                if(dr[0].ToString().Length > 0)
                {
                    this.cbEmpName.Items.Add(dr[0].ToString());
                }
            }
        con.Close();
        }
        catch
        {
            MessageBox.Show("Connection Failed");
        }
}
    private void comboEmpName_SelectedIndexChanged(object sender, System.EventArgs e)
    {
        MessageBox.Show("Emp ID:" + ' ' + this.cbEmpName.SelectedValue + ", " + "EmpName:" + ' ' + this.cbEmpName.SelectedItem   );
    }

我没有得到ID，而选择一个员工，消息框只是显示我的名字…谁能告诉我我的错在哪里?非常感谢

从组合框中获取所选值的ID

将组合框绑定后，通过使用数据读取器插入值来删除绑定。只需删除这部分:

while (dr.Read())
{
    if(dr[0].ToString().Length > 0)
    {
        this.cbEmpName.Items.Add(dr[0].ToString());
    }
}

如果你想保留代码，你应该改变添加项目的行，使它包括值和显示数据:

this.cbEmpName.Items.Add(
    new { EmpName = dr[0].ToString(), ID = dr[1].ToString()});

试试这个

this.cbEmpName.Items.Add(new ListItem(dr[0].ToString(),dr[4].ToString()));
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