DataGridView使用BindingNavigator实现简单分页功能
private int pageSize; //每页显示记录数
private int pageIndex; //页序号
private int totalCount; //总记录数
private int pageCount; //总页数
public BindingNavigatorMain()
{
InitializeComponent();
}
private void BindingNavigatorMain_Load(object sender, EventArgs e)
{
pageSize = 20;
pageIndex = 0;
SetPage();
}
//设置页
private void SetPage()
{
//总记录数
totalCount = 0;
BindPage(pageSize, pageIndex + 1, out totalCount);
//总页数
if (totalCount % pageSize == 0)
pageCount = totalCount / pageSize;
else
pageCount = totalCount / pageSize + 1;
//当前页及总页数
txtCurrentPage.Text = (pageIndex + 1).ToString();
lblTotalPage.Text = "共 " + pageCount.ToString() + " 页";
//BindingNavigator数据源不进行BindingSource赋值,但恢复控件可用性。
bindingNavigatorMoveFirstItem.Enabled = true;
bindingNavigatorMovePreviousItem.Enabled = true;
txtCurrentPage.Enabled = true;
lblTotalPage.Enabled = true;
bindingNavigatorMoveNextItem.Enabled = true;
bindingNavigatorMoveLastItem.Enabled = true;
}
///
/// 绑定页
///
/// 每页显示记录数
/// 页序号
/// 总记录数
private void BindPage(int pageSize, int pageIndex, out int totalCount)
{
SqlConnection conn = null;
SqlCommand cmd = null;
totalCount = 0;
#region 连接数据库测试
try
{
//数据库连接
conn = new SqlConnection("server=.;database=DB_TEST;Uid=sa;pwd=********;");
conn.Open();
//SqlCommand
cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "PageTest";
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter[] param =
{
new SqlParameter("@PageSize",SqlDbType.Int),
new SqlParameter("@PageIndex",SqlDbType.Int),
new SqlParameter("@TotalCount",SqlDbType.Int)
};
param[0].Value = pageSize;
param[1].Value = pageIndex;
param[2].Direction = ParameterDirection.Output;
cmd.Parameters.AddRange(param);
//DataTable
DataTable dt = new DataTable("MF_MO");
dt.Columns.Add(new DataColumn("MO_NO", typeof(String)));
dt.Columns.Add(new DataColumn("MRP_NO", typeof(String)));
dt.Columns.Add(new DataColumn("QTY", typeof(Decimal)));
dt.Columns.Add(new DataColumn("BIL_NO", typeof(String)));
#region 方法一:SqlDataReader
SqlDataReader dr = cmd.ExecuteReader();
dt.Load(dr, LoadOption.PreserveChanges);
dr.Close();
totalCount = (int)param[2].Value;
dataGridView1.DataSource = dt;
#endregion
#region #方法二:SqlDataAdapter
//SqlDataAdapter da = new SqlDataAdapter();
//da.SelectCommand = cmd;
//dt.BeginLoadData();
//da.Fill(dt);
//dt.EndLoadData();
//totalCount = (int)param[2].Value;
//dataGridView1.DataSource = dt;
#endregion
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
conn.Close();
cmd.Dispose();
}
#endregion
}
///
/// 首页
///
///
///
private void bindingNavigatorMoveFirstItem_Click(object sender, EventArgs e)
{
pageIndex = 0;
SetPage();
}
///
/// 上一页
///
///
///
private void bindingNavigatorMovePreviousItem_Click(object sender, EventArgs e)
{
pageIndex--;
if (pageIndex < 0)
{
pageIndex = 0;
}
SetPage();
}
///
/// 下一页
///
///
///
private void bindingNavigatorMoveNextItem_Click(object sender, EventArgs e)
{
pageIndex++;
if (pageIndex > pageCount - 1)
{
pageIndex = pageCount - 1;
}
SetPage();
}
///
/// 末页
///
///
///
private void bindingNavigatorMoveLastItem_Click(object sender, EventArgs e)
{
pageIndex = pageCount - 1;
SetPage();
}
///
/// 只能按0-9、Delete、Enter、Backspace键
///
///
///
private void txtCurrentPage_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar >= 48 && e.KeyChar <= 57) || e.KeyChar == 8 || e.KeyChar == 13 || e.KeyChar == 127)
{
e.Handled = false;
if (e.KeyChar == 13)
{
Go();
}
}
else
{
e.Handled = true;
}
}
///
/// 指定页
///
///
///
private void btnGo_Click(object sender, EventArgs e)
{
Go();
}
private void Go()
{
if (string.IsNullOrEmpty(txtCurrentPage.Text))
{
MessageBox.Show("指定页不能为空。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
txtCurrentPage.Focus();
return;
}
if (int.Parse(txtCurrentPage.Text) > pageCount)
{
MessageBox.Show("指定页已超过总页数。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
txtCurrentPage.Focus();
return;
}
pageIndex = int.Parse(txtCurrentPage.Text) - 1;
SetPage();
}
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