在使用DataGrid分頁的時候，正常情況下，綁定數據庫列表紀錄時會自動產生分頁的效果，然而我發覺在刪除紀錄的時候總會發生"無效的 CurrentPageIndex 值。它必須大于等于 0 且小于 PageCount。"的異常，其實解決這個問題很簡單，我們要做的就是在DataGrid1_DeleteCommand事件中判斷CurrentPageIndex的值，并根據不同的結果來綁定DataGrid。

?//檢索數據庫的函數
??public DataSet GetZcbd()
??{
???try
???{
????DataSet ds=new DataSet();???
????string searchString="select id,yy,bj from zc";
????da=new OleDbDataAdapter(searchString,conn);
????da.Fill(ds,"yy");????
????return ds;
???}
???catch
???{
????return null;????
???}??
???????????
??}

?//綁定DataGrid???
private void BindGrid()
??{
???DataSet ds = new DataSet();
???ds = us.GetZcbd();
???if (ds!=null)
???{
????this.DataGrid1.DataSource = ds;
????this.DataGrid1.DataBind();
???}
???else
???{
????msg.Alert("加載數據錯誤！",Page);
???}
??}

//刪除數據庫紀錄函數
??public string DeleteZcbd(int bdID)
??{

???int count = this.IfExiseZysx(bdID);//不必理會次句，默認count=1
???if (count <= 0) return "false";
???else
???{
????string sqlStr = "delete from zcwhere id="+bdID;
????OleDbCommand cmd = new OleDbCommand(sqlStr,conn);

????conn.Open();

????try
????{
?????cmd.ExecuteNonQuery();
?????return "true";
????}
????catch(Exception e)
????{
?????return e.Message.ToString();
????}
????finally
????{
?????conn.Close();
????}??????
???}
??}

//?DataGrid1_DeleteCommand事件修改函數??
private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
??{
???int bdID = int.Parse(DataGrid1.DataKeys[(int)e.Item.ItemIndex].ToString());
???string isDel = us.DeleteZcbd(bdID);
???int CurrentPage = 0;
???if (isDel == "true")
???{
????if(this.DataGrid1.CurrentPageIndex == this.DataGrid1.PageCount -1)
????{
???if (this.DataGrid1.CurrentPageIndex == 0)
????{
?????this.DataGrid1.CurrentPageIndex = this.DataGrid1.PageCount -1;
????}
????else
????{
?????if (this.DataGrid1.Items.Count % this.DataGrid1.PageSize == 1)
?????{
??????CurrentPage = 2;
?????}
?????else
?????{
??????CurrentPage = 1;
?????}
?????this.DataGrid1.CurrentPageIndex = this.DataGrid1.PageCount - CurrentPage;
????}
?? }
????this.BindGrid();
???}
???else
???{
?????? msg.Alert("刪除數據錯誤！",Page);
???}
?
??}
????注釋：msg為一個類似WinForm的messagebox對話框，不必理會。可以使用label.Text代替

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