c#封装类
以sqlite为例,封装一个类
首先,添加引用
using System.Data;
using System.Windows.Forms;
using System.Data.SQLite;
然后定义类名字,并完善相关代码
public void FillDataToGridView(string sqlStr, SQLiteConnection connection, DataGridView dataGridView, Label label)//封装成类
{
try
{
SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter(sqlStr, connection);
DataTable dataTable = new DataTable();
dataAdapter.Fill(dataTable);
dataGridView.DataSource = dataTable;
int dataNum = dataTable.Rows.Count;
label.Text = "当前共有【" + dataNum.ToString() + "】条数据";
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
connection.Close();
}
}
最后,引用封装的类
DataHelper dataHelper = new DataHelper(); dataHelper.FillDataGridView(GlobalData.Sql_Str, Conn_Add, dataGridView1, label_Tips);