如何在一个comboBox中显示多个列

Question

我想在一个comboBox中显示很多列。

我试过这个：

 da = new SqlDataAdapter("select * from do_data",cn);
        da.Fill(dt3);
        comboBox1.DataSource = dt3;
        comboBox1.DisplayMember = "fname+lname";
        comboBox1.ValueMember = "id";

但它没有显示两个列，它显示了＆＃39; ValueMember＆＃39;。

怎么做？

Answer 1

试试这个

da = new SqlDataAdapter("select id,fname + ' ' + lname As Name from do_data",cn);
da.Fill(dt3);
comboBox1.DataSource = dt3;
comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "id";

如果您想要所有列，请尝试以下

da = new SqlDataAdapter("select *,fname + ' ' + lname As Name from do_data",cn);
da.Fill(dt3);
comboBox1.DataSource = dt3;
comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "id";

Answer 2

您可以添加computed column并将其设置为显示成员

dt3.Columns.Add("Combined", typeof(string), "fname+'  '+ fname");

comboBox1.DataSource = dt3;
comboBox1.DisplayMember = "Combined";
comboBox1.ValueMember = "id";