c# - c# Gridview - 从 datareader 绑定选定的列

Question

我有一个 sql statemente，但我不想在 gridview (c# webforms) 中显示所有信息。如何在运行时在gridview上绑定特定列？

谢谢

Answer 1

首先，我会在 Visual Studio Designer 中编辑列，以便获得我想要的确切列。

这取决于您如何将数据提取到 DataGrid 中。如果您使用 SqlDataSource，我建议您关闭Selecting事件。在其他情况下（SqlDataReader）我会在阅读时进行绑定。或者你也可以使用 Linq to Entity 来获取你想要的值，就像这样：

var name = from names in context.data_table
           select names;
gridview.datasource = name;

Answer 2

您可以自己为 DataGridView 创建列。例子：

DataGridView dataGridView1 = new DataGridView();
BindingSource bindingSource1 = new BindingSource();

dataGridView1.ColumnCount = 2;

dataGridView1.Columns[0].Name = "FieldA";
dataGridView1.Columns[0].DataPropertyName = "FieldA";
dataGridView1.Columns[1].Name = "FieldB";
dataGridView1.Columns[1].DataPropertyName = "FieldB";

bindingSource1.DataSource = GetDataTable();
dataGridView1.DataSource = bindingSource1;

Answer 3

Be sure to Data Bind your grid after you set a Data Source like shown above. Best of luck!

Entities entities = ObjectContextManager.GetCurrentContext<AdHocReportingEntities>();
var users = from e in entities.Users  
    where e.State == userState'
    orderby e.Name   
    select new { e.Name, e.State};  
Grid.DataSource = users; 
Grid.DataBind();`