datagridview 如何循環滾動顯示

 datagridview循環滾動顯示

首先設置dataGridView的SelectionMode值爲FullRowSelect,
MultiSelect值爲false.
其次記錄不要太少.因爲記錄太少的時候,FirstDisplayedScrollingRowIndex會一直爲0.對其進行賦值等操作

都會無效

要實現循環滾動,須添加計時器事件,計時器代碼如下:

 private   void   timer1_Tick(object   sender,   EventArgs   e) 
{     //dgvcasebystreet爲DataGridVew控件 
       int   index   =   this.dgvcasebystreet.FirstDisplayedScrollingRowIndex;   
       this.dgvcasebystreet.Rows[index].Selected   =   true;  // 設置爲選中.
       this.dgvcasebystreet.FirstDisplayedScrollingRowIndex++; 
        //如果數據太少.就不滾動 
          if   (index   ==   this.dgvcasebystreet.FirstDisplayedScrollingRowIndex) 
           { 
              return; 
           } 
           //將剛纔定位的數據插入到dtSource的末尾.這是爲了實現循環滾動. 
           dtSource.ImportRow(dtSource.Rows[index]); 
            //rowCount爲記錄總數 
            if   (this.dgvcasebystreet.FirstDisplayedScrollingRowIndex   >   rowCount   -   1) 
            { 
            //初始時,將數據取出同時放在dtSource   與dtTmpSource中, 
            //現在dtSource中,已增加了很多數據. 
           //因而在所有原數據都遍歷完,開始下一次遍歷時,將原數據覆蓋現在的dtSource   ; 
            dtSource   =   dtTmpSource; 
            this.dgvcasebystreet.FirstDisplayedScrollingRowIndex   =   0; 
            } 
                          
   }

 //下面註釋掉代碼,只是用來說明程序中是如何綁定數據的.
//BindingSource   bindSrc   =   new   BindingSource();                         
 //bindSrc.Clear(); 
//bindSrc.DataSource   =   dtSource;//該dtSource爲存放數據的dataTable對象 
//this.dgvcasebystreet.DataSource   =   bindSrc;