GridView实现翻页全选功能

之前也有做过很多对列表信息进行多选的功能，但一般都只涉及到单页勾选。那这此工作需要，自己需要对列表中的信息进行分页全选。下面我就对此进行阐述：

首先我这里用到的列表控件是GridView，

 

关键步骤：

protected void GridView1_DataBinding(object sender, EventArgs e)
    {
        //在每一次重新绑定之前，需要调用CollectSelected方法从当前页收集选中项的情况
        CollectSelected();
    }

 

    /// <summary>
    /// 获取或设置选中项的集合
    /// </summary>
    protected ArrayList SelectedItems
    {
        get
        {
            return (ViewState["mySelectedItems"] != null) ? (ArrayList)ViewState["mySelectedItems"] : null;
        }
        set
        {
            ViewState["mySelectedItems"] = value;
        }
    }

 

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#D6E4F2'");
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");
         //这里的处理是为了回显之前选中的情况
        if (e.Row.RowIndex > -1 && this.SelectedItems!=null)
        {
            DataRowView row = e.Row.DataItem as DataRowView;
            CheckBox cb = e.Row.FindControl("CheckedUser") as CheckBox;
            if (this.SelectedItems.Contains(row["uname"].ToString()))
                cb.Checked = true;
            else
                cb.Checked = false;
        }        
    }

 

    /// <summary>
    /// 从当前页收集选中项的情况
    /// </summary>
    protected void CollectSelected()
    {
        ArrayList selectedItems = null;
        if (this.SelectedItems == null)
            selectedItems = new ArrayList();
        else
            selectedItems = this.SelectedItems;

        for (int i = 0; i < this.GridView1.Rows.Count; i++)
        {
            string id = this.GridView1.Rows[i].Cells[6].Text.ToString();
            Label lblUnit = (Label)GridView1.Rows[i].Cells[4].FindControl("lblUsers");
            CheckBox cb = this.GridView1.Rows[i].FindControl("CheckedUser") as CheckBox;
            if (selectedItems.Contains(id) && !cb.Checked)
                selectedItems.Remove(id);
            if (!selectedItems.Contains(id) && cb.Checked)
                selectedItems.Add(id);
        }
        this.SelectedItems = selectedItems;
    }