int pageSize = 0; //每页显示行数
int nMax = 0; //总记录数
int pageCount = 0; //页数＝总记录数/每页显示行数
int pageCurrent = 0; //当前页号
int nCurrent = 0; //当前记录行
private void Bind()
{
//td = um.dataAll();
pageSize = 30; //设置页面行数
nMax = td.Rows.Count;
pageCount = (nMax / pageSize); //计算出总页数
if ((nMax % pageSize) > 0) pageCount++;
pageCurrent = 1; //当前页数从1开始
nCurrent = 0; //当前记录数从0开始
LoadData();
}
private void LoadData()
{
int nStartPos = 0; //当前页面开始记录行
int nEndPos = 0; //当前页面结束记录行
DataTable dtTemp = td.Clone(); //克隆DataTable结构框架
if (pageCurrent == pageCount)
{
nEndPos = nMax;
}
else
{
nEndPos = pageSize * pageCurrent;
}
nStartPos = nCurrent;
lblPageCount.Text = "共 " + pageCount.ToString() + " 页";
txtCurrentPage.Text = Convert.ToString(pageCurrent);
//从元数据源复制记录行
if (td.Rows.Count > 0)
{
for (int i = nStartPos; i < nEndPos; i++)
{
dtTemp.ImportRow(td.Rows[i]);
nCurrent++;
}
}
dataGridView1.DataSource = dtTemp;
//datagridView默认不选中行
int endC = td.Rows.Count;
if (endC > pageSize * pageCurrent)
endC = pageSize * pageCurrent;
int k = 0;
for (int i = pageSize * (pageCurrent - 1) + 1; i <= endC; i++)
{
dataGridView1.Rows[k].HeaderCell.Value = i.ToString();
k++;
}
}
private void up_Click(object sender, EventArgs e)
{
pageCurrent--;
if (pageCurrent <= 0)
{
MessageBox.Show("已经是第一页，请点击“下一页”查看！");
return;
}
else
{
nCurrent = pageSize * (pageCurrent - 1);
}
LoadData();
}
private void down_Click(object sender, EventArgs e)
{
pageCurrent++;
if (pageCurrent > pageCount)
{
MessageBox.Show("已经是最后一页，请点击“上一页”查看！");
return;
}
else
{
nCurrent = pageSize * (pageCurrent - 1);
}
LoadData();
}
private void first_Click(object sender, EventArgs e)
{
pageCurrent = 1;
nCurrent = pageSize * (pageCurrent - 1);
LoadData();
}
private void end_Click(object sender, EventArgs e)
{
pageCurrent = pageCount;
nCurrent = pageSize * (pageCurrent - 1);
LoadData();
}
private void skip_Click(object sender, EventArgs e)
{
int CurrentP = Convert.ToInt32(txtCurrentPage.Text.ToString());
if (CurrentP > pageCount)
{
MessageBox.Show("超过最大页数，请重新输入");
return;
}
else
{
pageCurrent = CurrentP;
nCurrent = pageSize * (pageCurrent - 1);
LoadData();
}
}
