在ASP.Net Gridview控件中实现分页

Question

我有一个在页面加载时绑定的gridview，并且我已经使用页脚行技术实现了插入。

现在我尝试了在同一个gridview中的分页。

我没有错误，但当在页脚行的DDL中更改页面时，我发现所有值都重复。

在第一页DDL输出为：

MSG 
PAY 
BUY 
LIS 

如果改变了页面的页号两个第二输出是：

MSG 
PAY 
BUY 
LIS 
MSG 
PAY 
BUY 
LIS 

我会非常感激的任何建议。

谢谢！

我用这行的RowDataBound：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     if (e.Row.RowType == DataControlRowType.DataRow && GridView1.EditIndex == e.Row.RowIndex) 
     { 
      DropDownList Area_DDL = (DropDownList)e.Row.FindControl("Area_DDL"); 
      Area_DDL.DataTextField = "area_name"; 
      Area_DDL.DataValueField = "area"; 
      Area_DDL.DataSource = Area(); 
      Area_DDL.DataBind(); 
      Area_DDL.Items.FindByValue((e.Row.FindControl("Area") as Label).Text).Selected = true; 
     } 

     if (e.Row.RowType == DataControlRowType.Footer) 
     { 
      DropDownList Area_DDL = (DropDownList)e.Row.FindControl("Area_DDL"); 
      Area_DDL.DataTextField = "area_name"; 
      Area_DDL.DataValueField = "area"; 
      Area_DDL.DataSource = Area(); 
      Area_DDL.DataBind(); 
     } 

     if (e.Row.RowType == DataControlRowType.Pager) 
     { 
      DropDownList ddl = (DropDownList)(e.Row.FindControl("ddlpages")); 
      Label lblPageCount = (Label)e.Row.FindControl("lblPageCount"); 

      if (lblPageCount != null) 
       lblPageCount.Text = GridView1.PageCount.ToString(); 

      for (int i = 1; i <= GridView1.PageCount; i++) 
      { 
       ddl.Items.Add(i.ToString()); 
      } 

      ddl.SelectedIndex = GridView1.PageIndex; 

      if (GridView1.PageIndex == 0) 
      { 
       ((ImageButton)e.Row.FindControl("ImageButton1")).Visible = false; 
       ((ImageButton)e.Row.FindControl("ImageButton2")).Visible = false; 
      } 

      if (GridView1.PageIndex + 1 == GridView1.PageCount) 
      { 
       ((ImageButton)e.Row.FindControl("ImageButton3")).Visible = false; 
       ((ImageButton)e.Row.FindControl("ImageButton4")).Visible = false; 
      } 
     } 
    } 

Answer 1

更改您这样的代码，我希望它能帮助：

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e) 
{ 
    GridView1.PageIndex = e.NewPageIndex; 
    GridViewBind(); 
} 

protected void ddlPages_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    GridViewRow gvrPager = GridView1.BottomPagerRow; 
    DropDownList ddlPages = (DropDownList)gvrPager.Cells[0].FindControl("ddlPages"); 

    GridView1.PageIndex = ddlPages.SelectedIndex; 
    GridViewBind(); 
} 

protected void Paginate(object sender, CommandEventArgs e) 
{ 
    int intCurIndex = GridView1.PageIndex;   

    switch (e.CommandArgument.ToString().ToLower()) 
    { 
     case "First": 
      GridView1.PageIndex = 0;     
      break; 
     case "Prev": 
      GridView1.PageIndex = intCurIndex - 1; 
      break; 
     case "Next": 
      GridView1.PageIndex = intCurIndex + 1; 
      break; 
     case "Last": 
      GridView1.PageIndex = GridView1.PageCount - 1; 
      break; 
    } 
    GridView1.DataBind(); 
} 


protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
{ 
    if (e.Row.RowType == DataControlRowType.Pager) 
    { 
     DropDownList ddl = (DropDownList)(e.Row.FindControl("ddlpages")); 
     Label lblPageCount = (Label)e.Row.FindControl("lblPageCount"); 

     if (lblPageCount != null) 
     { 
      lblPageCount.Text = GridView1.PageCount.ToString(); 

      for (int i = 1; i <= GridView1.PageCount; i++) 
      { 
       ddl.Items.Add(i.ToString()); 
      } 

      ddl.SelectedIndex = GridView1.PageIndex; 

      if (GridView1.PageIndex == 0) 
      { 
       ((ImageButton)e.Row.FindControl("ImageButton1")).Visible = false; 
       ((ImageButton)e.Row.FindControl("ImageButton2")).Visible = false; 
      } 

      if (GridView1.PageIndex + 1 == GridView1.PageCount) 
      { 
       ((ImageButton)e.Row.FindControl("ImageButton3")).Visible = false; 
       ((ImageButton)e.Row.FindControl("ImageButton4")).Visible = false; 
      } 
     } 
    } 
}