Question

您好我想在网格视图中禁用具有特殊值条件的链接底部控件。例如，如果行的计数变为0，则该行的链接底部应该是不可见的。我该怎么办？我应该在哪里写代码？这是我在行命令网格视图中写的鳕鱼，但它仅适用于推送链接底部!!但我想在加载前将此鳕鱼应用于我的页面。请指导我

    int idx = Convert.ToInt32(e.CommandArgument);

    idx = idx - (GridView1.PageSize * GridView1.PageIndex);

    int ID = (int)GridView1.DataKeys[idx].Value;
    string connStr = ConfigurationManager.ConnectionStrings["dbconn"].ConnectionString;
    SqlConnection sqlconn = new SqlConnection(connStr);
    SqlCommand sqlcmd = new SqlCommand();
    sqlcmd = new SqlCommand("SELECT count(ID) FROM ReviwerArticle where ArticleID=@ArticleID", sqlconn);
    sqlcmd.Parameters.AddWithValue("@ArticleID", ID);

    sqlconn.Open();
    int count = ((int)sqlcmd.ExecuteScalar());

    sqlconn.Close();
    if (count == 0)
    {
                ((LinkButton)GridView1.Rows[idx].Cells[0].FindControl("LinkButton4") as LinkButton).Visible = false;

    }

Answer 1

然后不要尝试onrowcommand，因为这只会在执行某个操作时触发。如果您在代码隐藏中使用函数来加载数据，那么检查有多少行被推送到gridview。如果行为零，则禁用该按钮。如果行大于0则启用按钮。

Answer 2

在GridView的RowDataBound事件中执行..

 if (e.Row.RowType == DataControlRowType.DataRow)
        {
            int ID = Convert.ToInt32(GridView1.DataKeys[e.Row.RowIndex].Value;
    string connStr = ConfigurationManager.ConnectionStrings["dbconn"].ConnectionString;
    SqlConnection sqlconn = new SqlConnection(connStr);
    SqlCommand sqlcmd = new SqlCommand();
    sqlcmd = new SqlCommand("SELECT count(ID) FROM ReviwerArticle where ArticleID=@ArticleID", sqlconn);
    sqlcmd.Parameters.AddWithValue("@ArticleID", ID);

    sqlconn.Open();
    int count = ((int)sqlcmd.ExecuteScalar());

    sqlconn.Close();
    if (count == 0)
    {
                ((LinkButton)e.Row.Cells[0].FindControl("LinkButton4") as LinkButton).Visible = false;

    }
        }

禁用gridview内的控件

2 个答案: