我如何绑定一个组合框，以便displaymember是源数据表的2个字段的连接？ [英] How do I bind a ComboBox so the displaymember is concat of 2 fields of source datatable?

问题描述

我想将 ComboBox 绑定到 DataTable （我无法更改其原始架构）

I'd like to bind a ComboBox to a DataTable (I cannot alter its original schema)

cbo.DataSource = tbldata;
cbo.DataTextField = "Name";
cbo.DataValueField = "GUID";
cbo.DataBind();

我希望 ComboBox 显示 tbldata.Name + tbldata.Surname 。

当然，将新名称和姓氏作为字段添加到 tbldata 可以在绑定之前使用，但我希望按照（伪代码）寻求更优雅的解决方案

Of course adding the new name+surname as a field to the tbldata just before binding is possible, but I am hoping for a more elegant solution along the lines of (pseudocode)

cbo.DataTextField = "Name";
cbo.DataTextField += "Surname";

推荐答案

计算列解决方案可能是最好的。但是，如果您不能更改数据表的架构来添加它，则可以遍历该表并填充将用作数据源的新集合。

The calculated column solution is probably the best one. But if you can't alter the data table's schema to add that, you can loop through the table and populate a new collection that will serve as the data source.

var dict = new Dictionary<Guid, string>();
foreach (DataRow row in dt.Rows)
{
    dict.Add(row["GUID"], row["Name"] + " " + row["Surname"]);
}
cbo.DataSource = dict;
cbo.DataTextField = "Value";
cbo.DataValueField = "Key";
cbo.DataBind();

显然，这不像直接绑定到DataTable那样高效，但是我不必为此担心除非表有数千行。

Obviously this isn't as performant as binding directly to the DataTable but I wouldn't worry about that unless the table has thousands of rows.

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