C#代码给DropDownList的DataTextField属性绑定两个字段----2010年01月03日

给DropDownList的DataTextField属性绑定两个字段

方法1：在SQL查询语句中拼接字段

C#代码

1. using (SqlConnection conn = new SqlConnection("server=(local);database=Northwind;user id=sa;password=sa;min pool size=4;max pool size=100;Connection Lifetime=30;"))
2. {
3. SqlDataAdapter adapter1 = new SqlDataAdapter("Select Top 10 ProductId,ProductName+‘,‘+convert(nvarchar,UnitPrice) Text FROM Products", conn);
4. DataTable table1 = new DataTable();
5. adapter1.Fill(table1);
6. DropDownList1.DataSource = table1.DefaultView;
7. DropDownList1.DataTextField = "Text";
8. DropDownList1.DataValueField = "ProductId";
9. DropDownList1.DataBind();
10. }

方法2：在DataTable中新增一字段

C#代码

1. using (SqlConnection conn = new SqlConnection("server=(local);database=Northwind;user id=sa;password=sa;min pool size=4;max pool size=100;Connection Lifetime=30;"))
2. {
3. SqlDataAdapter adapter1 = new SqlDataAdapter("Select Top 10 ProductId,ProductName,UnitPrice FROM Products", conn);
4. DataTable table1 = new DataTable();
5. adapter1.Fill(table1);
6. table1.Columns.Add("Text", System.Type.GetType("System.String"), "ProductName+‘-‘+UnitPrice");
7. DropDownList1.DataSource = table1.DefaultView;
8. DropDownList1.DataTextField = "Text";
9. DropDownList1.DataValueField = "ProductId";
10. DropDownList1.DataBind();
11. }

原文地址：https://www.cnblogs.com/mej1314/p/11283828.html