asp.net分页功能的实现

效果图：
　

代码：
static int PageSize = 30;

#region 分页部分代码
//*********************************** 数据分页 ********************************
protected void FirstPage_Click1(object sender, EventArgs e)
{
int RecordCount = GetRecordCount(ViewState["ssearchCondition"].ToString());  //获取记录条数
DataTable dt = GetListByPage(ViewState["ssearchCondition"].ToString(),1,PageSize);
int PageCount = RecordCount % PageSize > 0 ? RecordCount / PageSize + 1 : RecordCount / PageSize;
int CurrentPageNum;
if (PageCount == 0)
{
CurrentPageNum = 0;
}
else
{
CurrentPageNum = 1;
}
CurrentPage.Text = (CurrentPageNum).ToString();
TotalPageCount.Text = PageCount.ToString();
EnableJudger();

ViewState["PageCount"] = PageCount;
ViewState["CurrentPageNum"] = CurrentPageNum;

int rowNum = 1;
if (int.Parse(ViewState["PageCount"].ToString()) > 0)
{
rowNum += (int.Parse(ViewState["CurrentPageNum"].ToString()) - 1) * PageSize;
}
dt.Columns.Add(new DataColumn("rowN"));
for (int i = 0; i < dt.Rows.Count; i++)
{
dt.Rows[i]["rowN"] = rowNum++;
}

Repeater1.DataSource = dt;
Repeater1.DataBind();
}

protected void PrePage_Click(object sender, EventArgs e)
{
int RecordCount = GetRecordCount(ViewState["ssearchCondition"].ToString());  //获取记录条数
int PageCount = RecordCount % PageSize > 0 ? RecordCount / PageSize + 1 : RecordCount / PageSize;
int CurrentPageNum = (int)ViewState["CurrentPageNum"];
DataTable dt = GetListByPage(ViewState["ssearchCondition"].ToString(), PageSize * (CurrentPageNum - 2) + 1, PageSize * (CurrentPageNum - 2) + PageSize);
CurrentPageNum -= 1;
CurrentPage.Text = (CurrentPageNum).ToString();
TotalPageCount.Text = PageCount.ToString();
EnableJudger();

ViewState["PageCount"] = PageCount;
ViewState["CurrentPageNum"] = CurrentPageNum;

int rowNum = 1;
if (int.Parse(ViewState["PageCount"].ToString()) > 0)
{
rowNum += (int.Parse(ViewState["CurrentPageNum"].ToString()) - 1) * PageSize;
}
dt.Columns.Add(new DataColumn("rowN"));
for (int i = 0; i < dt.Rows.Count; i++)
{
dt.Rows[i]["rowN"] = rowNum++;
}

Repeater1.DataSource = dt;
Repeater1.DataBind();
}

protected void NextPage_Click(object sender, EventArgs e)
{
int RecordCount = GetRecordCount(ViewState["ssearchCondition"].ToString());  //获取记录条数
int PageCount = RecordCount % PageSize > 0 ? RecordCount / PageSize + 1 : RecordCount / PageSize;
int CurrentPageNum = (int)ViewState["CurrentPageNum"];
DataTable dt = GetListByPage(ViewState["ssearchCondition"].ToString(), PageSize * (CurrentPageNum) + 1, PageSize * (CurrentPageNum) + PageSize);
CurrentPageNum += 1;
CurrentPage.Text = (CurrentPageNum).ToString();
TotalPageCount.Text = PageCount.ToString();
EnableJudger();

ViewState["PageCount"] = PageCount;
ViewState["CurrentPageNum"] = CurrentPageNum;

int rowNum = 1;
if (int.Parse(ViewState["PageCount"].ToString()) > 0)
{
rowNum += (int.Parse(ViewState["CurrentPageNum"].ToString()) - 1) * PageSize;
}
dt.Columns.Add(new DataColumn("rowN"));
for (int i = 0; i < dt.Rows.Count; i++)
{
dt.Rows[i]["rowN"] = rowNum++;
}

Repeater1.DataSource = dt;
Repeater1.DataBind();
}

protected void LastPage_Click(object sender, EventArgs e)
{
int RecordCount = GetRecordCount(ViewState["ssearchCondition"].ToString());  //获取记录条数
int PageCount = RecordCount % PageSize > 0 ? RecordCount / PageSize + 1 : RecordCount / PageSize;

DataTable dt = GetListByPage(ViewState["ssearchCondition"].ToString(), PageSize * (PageCount - 1) + 1, PageSize * (PageCount - 1) + PageSize);
int CurrentPageNum = PageCount;
CurrentPage.Text = PageCount.ToString();
TotalPageCount.Text = PageCount.ToString();
EnableJudger();

ViewState["PageCount"] = PageCount;
ViewState["CurrentPageNum"] = CurrentPageNum;

int rowNum = 1;
if (int.Parse(ViewState["PageCount"].ToString()) > 0)
{
rowNum += (int.Parse(ViewState["CurrentPageNum"].ToString()) - 1) * PageSize;
}
dt.Columns.Add(new DataColumn("rowN"));
for (int i = 0; i < dt.Rows.Count; i++)
{
dt.Rows[i]["rowN"] = rowNum++;
}

Repeater1.DataSource = dt;
Repeater1.DataBind();
}

protected void lbtnGoPage_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(txtGoPage.Text))
{
return;
}
int gotoPageNum = int.Parse(txtGoPage.Text);
int RecordCount = GetRecordCount(ViewState["ssearchCondition"].ToString());  //获取记录条数
DataTable dt = new DataTable();
int CurrentPageNum = gotoPageNum;
int PageCount = RecordCount % PageSize > 0 ? RecordCount / PageSize + 1 : RecordCount / PageSize;
if (gotoPageNum < 1 || gotoPageNum > PageCount)
{
}
else
{
dt = GetListByPage(ViewState["ssearchCondition"].ToString(), PageSize * (CurrentPageNum - 1) + 1, PageSize * (CurrentPageNum - 1) + PageSize);
CurrentPage.Text = (gotoPageNum).ToString();
TotalPageCount.Text = PageCount.ToString();
EnableJudger();

ViewState["PageCount"] = PageCount;
ViewState["CurrentPageNum"] = CurrentPageNum;

int rowNum = 1;
if (int.Parse(ViewState["PageCount"].ToString()) > 0)
{
rowNum += (int.Parse(ViewState["CurrentPageNum"].ToString()) - 1) * PageSize;
}
dt.Columns.Add(new DataColumn("rowN"));
for (int i = 0; i < dt.Rows.Count; i++)
{
dt.Rows[i]["rowN"] = rowNum++;
}

Repeater1.DataSource = dt;
Repeater1.DataBind();
}
}
private void EnableJudger()
{
//1. 没有数据
if (int.Parse(TotalPageCount.Text) <= 0)
{
FirstPage.Enabled = false;
PrePage.Enabled = false;
NextPage.Enabled = false;
LastPage.Enabled = false;
lbtnGoPage.Enabled = false;
CurrentPage.Text = "0";
return;
}
//2. 只有一页数据
if (int.Parse(CurrentPage.Text) == 1 && int.Parse(TotalPageCount.Text) == 1)
{
FirstPage.Enabled = false;
PrePage.Enabled = false;
NextPage.Enabled = false;
LastPage.Enabled = false;
lbtnGoPage.Enabled = false;
return;
}
//3. 当前为第一页，总页数大于1
if (int.Parse(CurrentPage.Text) == 1 && int.Parse(TotalPageCount.Text) > 1)
{
FirstPage.Enabled = false;
PrePage.Enabled = false;
NextPage.Enabled = true;
LastPage.Enabled = true;
lbtnGoPage.Enabled = true;
return;
}
//4. 当前页为中间页
if (int.Parse(CurrentPage.Text) > 1 && int.Parse(CurrentPage.Text) < int.Parse(TotalPageCount.Text))
{
FirstPage.Enabled = true;
PrePage.Enabled = true;
NextPage.Enabled = true;
LastPage.Enabled = true;
lbtnGoPage.Enabled = true;
return;
}
//5.当前页为最后一页，总页数大于1
if (int.Parse(CurrentPage.Text) == int.Parse(TotalPageCount.Text) && int.Parse(CurrentPage.Text) > 1)
{
FirstPage.Enabled = true;
PrePage.Enabled = true;
NextPage.Enabled = false;
LastPage.Enabled = false;
return;
}

}

/// <summary>
/// 获取记录总数
/// </summary>
public int GetRecordCount(string strWhere)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("select count(1) from tb_ProjectRegister");
if (strWhere.Trim() != "")
{
strSql.Append(" where " + strWhere);
}
object obj = GetSingle(strSql.ToString());
if (obj == null)
{
return 0;
}
else
{
return Convert.ToInt32(obj);
}
}
public static object GetSingle(string SQLString)
{
using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["NMXT_DBConn"].ToString()))
{
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataTable GetListByPage(string strWhere, int startIndex, int endIndex)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("SELECT * FROM ( ");
strSql.Append(" SELECT ROW_NUMBER() OVER (");
strSql.Append("order by T.roleId asc,T.replyEnd desc");
strSql.Append(")AS Row, T.*  from tb_ProjectRegister T ");
if (!string.IsNullOrEmpty(strWhere.Trim()))
{
strSql.Append(" WHERE " + strWhere);
}
strSql.Append(" ) TT");
strSql.AppendFormat(" WHERE TT.Row between {0} and {1}", startIndex, endIndex);
DataSet ds = Query(strSql.ToString());

DataTable newDt = ds.Tables[0].Copy();
DataColumn newCol1 = new DataColumn("Description");
DataColumn newCol2 = new DataColumn("newCol2");
DataColumn newCol3 = new DataColumn("newCol3");
DataColumn newCol4 = new DataColumn("newCol4");
DataColumn newCol5 = new DataColumn("newCol5");
DataColumn newCol6 = new DataColumn("newCol6");
DataColumn newCol7 = new DataColumn("newCol7");
DataColumn newCol8 = new DataColumn("newCol8");
newDt.Columns.Add(newCol1);
newDt.Columns.Add(newCol2);
newDt.Columns.Add(newCol3);
newDt.Columns.Add(newCol4);
newDt.Columns.Add(newCol5);
newDt.Columns.Add(newCol6);
newDt.Columns.Add(newCol7);
newDt.Columns.Add(newCol8);
Dictionary<string, string> newDic = GetRoleDescriptions();
if (newDic == null)
{
foreach (DataRow row in newDt.Rows)
{
row["Description"] = "";

if (Convert.ToDateTime(row["applyStart"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol2"] = "";
}
else
{
row["newCol2"] = Convert.ToDateTime(row["applyStart"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["applyEnd"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol3"] = "";
}
else
{
row["newCol3"] = Convert.ToDateTime(row["applyEnd"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["replyStart"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol4"] = "";
}
else
{
row["newCol4"] = Convert.ToDateTime(row["replyStart"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["replyEnd"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol5"] = "";
}
else
{
row["newCol5"] = Convert.ToDateTime(row["replyEnd"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["realEnd"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol6"] = "";
}
else
{
row["newCol6"] = Convert.ToDateTime(row["realEnd"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["acceptDate_zdb"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol7"] = "";
}
else
{
row["newCol7"] = Convert.ToDateTime(row["acceptDate_zdb"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["acceptDate_zjb"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol8"] = "";
}
else
{
row["newCol8"] = Convert.ToDateTime(row["acceptDate_zjb"]).ToString("yyyy-MM-dd");
}
}
}
else
{
foreach (DataRow row in newDt.Rows)
{
if (newDic.ContainsKey(row["roleId"].ToString()))
{
row["Description"] = newDic[row["roleId"].ToString()];
}
else
{
row["Description"] = "";
}

if (Convert.ToDateTime(row["applyStart"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol2"] = "";
}
else
{
row["newCol2"] = Convert.ToDateTime(row["applyStart"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["applyEnd"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol3"] = "";
}
else
{
row["newCol3"] = Convert.ToDateTime(row["applyEnd"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["replyStart"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol4"] = "";
}
else
{
row["newCol4"] = Convert.ToDateTime(row["replyStart"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["replyEnd"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol5"] = "";
}
else
{
row["newCol5"] = Convert.ToDateTime(row["replyEnd"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["realEnd"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol6"] = "";
}
else
{
row["newCol6"] = Convert.ToDateTime(row["realEnd"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["acceptDate_zdb"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol7"] = "";
}
else
{
row["newCol7"] = Convert.ToDateTime(row["acceptDate_zdb"]).ToString("yyyy-MM-dd");
}

if (Convert.ToDateTime(row["acceptDate_zjb"]).ToString("yyyy-MM-dd") == "1900-01-01")
{
row["newCol8"] = "";
}
else
{
row["newCol8"] = Convert.ToDateTime(row["acceptDate_zjb"]).ToString("yyyy-MM-dd");
}
}
}
return newDt;
}

public static DataSet Query(string SQLString)
{
using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["NMXT_DBConn"].ToString()))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (System.Data.SqlClient.SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
///********************************* 数据分页结束 ********************************
#endregion