實際開發過程中會遇到需要將一個DataTable拆分成多個DataTable(或者一個DataSet)的情況,以下代碼經過我正式開發使用:
/// <summary>
/// 分解數據表
/// </summary>
/// <param name="originalTab">需要分解的表</param>
/// <param name="rowsNum">每個表包含的數據量</param>
/// <returns></returns>
public static DataSet SplitDataTable(DataTable originalTab, int rowsNum)
{
if (originalTab == null || originalTab.Rows.Count < 1)
{
return null;
}
//獲取所需創建的表數量
int tableNum = originalTab.Rows.Count / rowsNum;
//獲取數據餘數
int remainder = originalTab.Rows.Count % rowsNum;
DataSet ds = new DataSet();
//獲取最後一個表的行數量
int lastRowsCount = 0;
if (remainder == 0)
{
lastRowsCount = rowsNum;
}
else
{
lastRowsCount = remainder;
}
//如果只需要創建1個表,直接將原始表存入DataSet
if (tableNum == 0)
{
ds.Tables.Add(originalTab.Copy());
}
else
{
int totalTableCount = remainder > 0 ? tableNum + 1 : tableNum;
DataTable[] tableSlice = new DataTable[totalTableCount];
//Save orginal columns into new table.
for (int c = 0; c < totalTableCount; c++)
{
tableSlice[c] = new DataTable();
foreach (DataColumn dc in originalTab.Columns)
{
tableSlice[c].Columns.Add(dc.ColumnName, dc.DataType);
}
}
//Import Rows
for (int i = 0; i < totalTableCount; i++)
{
// if the current table is not the last one
if (i != totalTableCount - 1)
{
for (int j = i * rowsNum; j < ((i + 1) * rowsNum); j++)
{
tableSlice[i].ImportRow(originalTab.Rows[j]);
}
}
else
{
for (int k = i * rowsNum; k < (i * rowsNum + lastRowsCount); k++)
{
tableSlice[i].ImportRow(originalTab.Rows[k]);
}
}
}
//add all tables into a dataset
foreach (DataTable dt in tableSlice)
{
ds.Tables.Add(dt);
}
}
return ds;
}
以上代碼的原始資料來自網絡,經過加工後所得,希望對路過剛好需要的朋友有幫助。