DataTable dt = 存在cache中的数据 DataTable newDt = dt.Clone(); System.Random rd = new Random(); for (int i = 0; i < 3; i++) { int x = rd.Next(0, 499); newDt.Rows.Add(dt.Rows[x].ItemArray); } newDt.AcceptChanges(); //最后,把newDt绑定到DataGrid显示在页面上
private DataRow[] GetRandRows(DataTable dt,int count) { DataRow[] drs = new DataRow[3]; int index = 0; for (int i = 0; i < count; i++) { Random rad = new Random(); index = rad.Next(0, 499); drs[i] = dt.Rows[index]; } return drs; }
给你写个通用的,一次取count条随机记录: private DataRow[] GetRandRows(DataTable dt,int count) { DataRow[] drs = new DataRow[count]; int index = 0; for (int i = 0; i < count; i++) { Random rad = new Random(); index = rad.Next(0, dt.Rows.Count-1); drs[i] = dt.Rows[index]; } return drs; }
System.Random rd = new Random();
for (int i = 0; i < 3; i++)
{
int x = rd.Next(0, 499);
newDt.Rows.Add(dt.Rows[x].ItemArray);
}
newDt.AcceptChanges(); //最后,把newDt绑定到DataGrid显示在页面上
{
DataRow[] drs = new DataRow[3];
int index = 0; for (int i = 0; i < count; i++)
{
Random rad = new Random();
index = rad.Next(0, 499);
drs[i] = dt.Rows[index];
}
return drs;
}
private DataRow[] GetRandRows(DataTable dt,int count)
{
DataRow[] drs = new DataRow[count];
int index = 0; for (int i = 0; i < count; i++)
{
Random rad = new Random();
index = rad.Next(0, dt.Rows.Count-1);
drs[i] = dt.Rows[index];
}
return drs;
}
Eddie005(♂) №.零零伍 (♂) 我按你的方法做了出现以下错误。
C:\Inetpub\wwwroot\ioio\chche\chche.aspx.cs(35): 无法将类型“object”隐式转换为“System.Data.DataTable”
C:\Inetpub\wwwroot\ioio\chche\chche.aspx.cs(36): 无法将类型“void”隐式转换为“System.Data.DataTable”