在运行时选择tableadapter

Question

假设有n个按钮和一个datagridview。

我拖动包含n个表的数据集，因此创建具有相同连接字符串的n个tableadapter。我想点击每个按钮分别显示每个tableadapter中的每个表。

我认为这是一个坏主意。

我应该以编程方式创建tableadapter而不是将控件拖到窗体中吗？

Answer 1

我刚为别人写了这段代码：

//class variable:
DataSet ds  = new DataSet();

//fill dataset in some of your method:
using(SqlConnection conn = new SqlConnection("connString"))
{
    DataTable table1 = new DataTable("People");
    DataTable table2 = new DataTable("Cars");
    ds.Tables.Add(table1);
    ds.Tables.Add(table2);
    string query1 = @"SELECT * FROM People";
    string query2 = @"SELECT * FROM Cars";
    string[] queries = { query1, query2 };
    for(int i = 0; i < queries.Length; i++)
    {
         using(SqlDataAdapter da = new SqlDataAdapter(queries[i], conn))
             da.Fill(ds.Tables[i]);
    }
}

//now bind tables to your button click events (this is example for Cars):
void button1_Click()
{
    dataGridView1.DataSource = null;
    dataGridView1.DataSource = ds.Tables["Cars"].DefaultView; 

    //do the same for table "People" in some other button click event
}