GridView 总结

1、GridView1_RowDataBound

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //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("CheckBox1") as CheckBox;
            if (this.SelectedItems.Contains(row["file_id"].ToString()))
                cb.Checked = true;
            else
                cb.Checked = false;
        }

        //改变颜色
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //得到正在被创建的项的称呼
            string uploadState = (string)DataBinder.Eval(e.Row.DataItem, "file_uploadstate");
            //变颜
            if (uploadState == "1")
            {
                e.Row.BackColor = System.Drawing.Color.LightPink;
                e.Row.ForeColor = System.Drawing.Color.Maroon;
            }
            else if (uploadState == "2")
            {
                e.Row.BackColor = System.Drawing.Color.LightCyan;
                e.Row.ForeColor = System.Drawing.Color.DarkBlue;
            }
        }
    }

2、分页

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

　　}

//重新绑定

 private void InitPage()
    {
        GridViewBind2();
    }

 3、行删除

首先在GridView的<Columns></Columns>内添加

<asp:CommandField ShowDeleteButton="True" HeaderText="操作" />

后添加GridView1_RowDeleting（行删除事件）

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
        string strConn = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        string strSql = "delete from archives where ar_id=" + id;
        try
        {
            SqlConnection conn = new SqlConnection(strConn);
            if (conn.State.ToString() == "Closed")
                conn.Open();
            SqlCommand comm = new SqlCommand(strSql, conn);
            comm.ExecuteNonQuery();

            comm.Dispose();
            if (conn.State.ToString() == "Open")
                conn.Close();
            GridView1.EditIndex = -1;
            GridViewBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }

 4、GridView中的值自动换行或不换行

GridView1.Attributes.Add("style", "word-break:break-all;word-wrap:break-word");
加到DataBound事件里面去

或放到

protected void Page_Load(object sender, EventArgs e)
    {
        //正常换行
        GridView1.Attributes.Add("style", "word-break:keep-all;word-wrap:normal");
        //下面这行是自动换行
        GridView1.Attributes.Add("style", "word-break:break-all;word-wrap:break-word");
        if (!IsPostBack)
        {
            bind();//调用数据绑定即可
        }
    }