如何在c＃中将表数据显示到datagridview中？

Question

mySqlCnnection.Open();
 string list = "select * from login";
 MySqlDataAdapter dataadapter = new MySqlDataAdapter(list, mySqlCnnection);
 DataSet ds = new DataSet();
 dataadapter.Fill(ds, "login");
 dataGridView1.DataSource =ds.Tables[0];

I want to display the entire login table data in a datagridview but am getting an empty widget?some one could please?

Answer 1

在分配DataSource之后调用DataBind() 。

Answer 2

Try using DataTable instead of using DataSet to fill data. Or check your sql connection.

Answer 3

Where you are using this code. On which you are using it? Try it on on_load event. Use Default view and then bind the data using DataBind() method.

dataGridView1.DataSource =ds.Tables[0].DefaultView;

dataGridView1.DataBind();

Answer 4

Your code:

    mySqlCnnection.Open();
    string list = "select * from login";
    MySqlDataAdapter dataadapter = new MySqlDataAdapter(list, mySqlCnnection);
    DataSet ds = new DataSet();
    dataadapter.Fill(ds, "login");
    dataGridView1.DataSource =ds.Tables[0];

And on the next line ...

dataGridView1.Databind();

Ugly though.

Answer 5

Try to Use binding source as datasource of your datagrid.

var bindingSource = new System.Windows.Forms.BindingSource();
bindingSource.DataSource = ds.Tables[0];
dataGridView1.DataSource = bindingSource;

Answer 6

string list = "select * from login";
SqlCommand command = new SqlCommand(list , db.connect());

SqlDataReader reader = command.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(reader);
dataGridView1.DataSource=dt;