日期: 2020-06-22 13:48:09
上篇文章给大家介绍DataGridView使用自定义控件实现简单分页功能，本篇使用BindingNavigator来实现简单分页功能。其实也只是借用了一个BindingNavigator空壳，
实现原理和代码与上一篇几乎一样，实现方法如下：
1、新建一个WinForm程序，命名为BindingNavigatorMain，并拖入一个DataGridView控件及一个BindingNavigator控件。在BindingNavigator右下角弹窗中添加
一个Button(转到)，BindingNavigator的样式如下：
2、BindingNavigatorMain的代码如下：
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;
}
/// <summary>
/// 绑定页
/// </summary>
/// <param name="pageSize">每页显示记录数</param>
/// <param name="pageIndex">页序号</param>
/// <param name="totalCount">总记录数</param>
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
}
/// <summary>
/// 首页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void bindingNavigatorMoveFirstItem_Click(object sender, EventArgs e)
{
pageIndex = 0;
SetPage();
}
/// <summary>
/// 上一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void bindingNavigatorMovePreviousItem_Click(object sender, EventArgs e)
{
pageIndex--;
if (pageIndex < 0)
{
pageIndex = 0;
}
SetPage();
}
/// <summary>
/// 下一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void bindingNavigatorMoveNextItem_Click(object sender, EventArgs e)
{
pageIndex++;
if (pageIndex > pageCount - 1)
{
pageIndex = pageCount - 1;
}
SetPage();
}
/// <summary>
/// 末页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void bindingNavigatorMoveLastItem_Click(object sender, EventArgs e)
{
pageIndex = pageCount - 1;
SetPage();
}
/// <summary>
/// 只能按0-9、Delete、Enter、Backspace键
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
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;
}
}
/// <summary>
/// 指定页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
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();
}
3、SQL Server创建存储过程PageTest：
CREATE PROCEDURE [dbo].[PageTest]
@PageSize INT,
@PageIndex INT,
@TotalCount INT OUTPUT
AS
BEGIN
--总记录数
SELECT @TotalCount=COUNT(1) FROM MF_MO
--记录返回(使用动态SQL绕开参数嗅探问题，效率大幅度提升。)
DECLARE @SQL NVARCHAR(1000)
SET @SQL=
'SELECT TOP ('+CONVERT(VARCHAR(32),@PageSize)+') MO_NO,MRP_NO,QTY,BIL_NO '+
'FROM MF_MO A '+
'WHERE NOT EXISTS (SELECT 1 FROM (SELECT TOP ('+CONVERT(VARCHAR(32),(@PageIndex-1)*@PageSize)+') MO_NO FROM MF_MO ORDER BY MO_NO) B WHERE A.MO_NO=B.MO_NO) '+
'ORDER BY MO_NO'
EXEC (@SQL)
END
4、执行程序：
好了，分享就到此结束了，希望对有此需要的人有一些帮助。
总结
以上所述是小编给大家介绍的DataGridView使用BindingNavigator实现简单分页功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对奥多码网站的支持！
如果你觉得本文对你有帮助，欢迎转载，烦请注明出处，谢谢！
