移动页面后保持 Gridview Checkbox 状态

Question

这是我的复选框的记住值代码

private void RememberOldGridValues()
    {
        ArrayList oUserCheckedList = new ArrayList();           
        int index = -1;
        int Value=0;
        foreach (GridViewRow row in gridViewResults.Rows)
        {
            if (((CheckBox)row.FindControl("chkSelect")).Checked)
            {
                index = row.RowIndex;
                Value=(int)gridViewResults.DataKeys[row.RowIndex].Value;
                if (Session["CHECKED_ITEMS"] != null)
                    oUserCheckedList = (ArrayList)Session["CHECKED_ITEMS"];
                if (oUserCheckedList.Count == 1)
                {
                    oUserCheckedList.RemoveAt(0);
                }
                if (!oUserCheckedList.Contains(index))
                    oUserCheckedList.Add(index);
                    oUserCheckedList.Add(Value);
            }
            if (index >= 0)
                break;
        }
        if (oUserCheckedList != null && oUserCheckedList.Count > 0)
            Session["CHECKED_ITEMS"] = oUserCheckedList;
    }

这是重新填充我无法在网格视图中获取数据时间。

private void RePopulateGridValues()
    {
        int value;
        ArrayList oUserCheckedList = (ArrayList)Session["CHECKED_ITEMS"];
        if (oUserCheckedList != null && oUserCheckedList.Count > 0)
        {
            foreach (GridViewRow row in gridViewResults.Rows)
            {
                string str = oUserCheckedList[0].ToString();
                value=Convert.ToInt32(oUserCheckedList[1].ToString());
                int i = Convert.ToInt32(str);
                if (row.RowIndex == i)
                {
                    if (value == Convert.ToInt32(row.DataItemIndex.ToString()))
                    {
                        CheckBox myCheckBox = (CheckBox)row.FindControl("chkSelect");
                        myCheckBox.Checked = true;
                    }
                }
            }
        }

Answer 1

您正在以错误的方式重新填充 Gridview 复选框。您必须使用 RowDatabound 事件。

protected void grd_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
         DataRow dr = ((DataRowView)e.Row.DataItem).Row;
         if (ArrayCollection.Find(dr["KeyColumnName"].ToString()))
//Dont try to store the index of your Grid and checkbox value, as if the page Index    change your Grid Index will will change. try to store KeyColumnName Value and then compare here and upon bases of set Checkbox = Chcekced
            {
                 CheckBox myCheckBox = (CheckBox)row.FindControl("chkSelect");
                 myCheckBox.Checked = true;
            }
    }
}