Question

我正在尝试创建一个表单，用户可以在数据网格视图中查看数据库中的数据。我希望用户能够选择从一个组合框cmbDate开始的时间段和另一个组合框中的句点cmbDateTo.I已经编写了以下代码：

命名空间linqToSql_trial { public partial class frmMonthlyOperatorStatistics：Form { private userLoginDataContext dc;

    public frmMonthlyOperatorStatistics()
    {
        InitializeComponent();
        dc = new userLoginDataContext();
    }

    private void LoadData()
    {
        cmbDate.DataSource = dc.dailyOperatorStatistics.Select(x=>x.date);

        cmbDate.DisplayMember = "date";
        cmbDate.ValueMember = "date";
    }

    private void LoadDateTo()
    {
        cmbToDate.DataSource = from to in dc.dailyOperatorStatistics
                               select to;
        cmbToDate.DisplayMember = "date";
        cmbToDate.ValueMember = "date";

    }

    private void btnLoad_Click(object sender, EventArgs e)
    {
        this.operatorStatDataGridView.DataSource = dc.dailyOperatorStatistics.Where(x => x.date >= Convert.ToDateTime(cmbDate.SelectedItem) && <= Convert.ToDateTime(cmbToDate.SelectedItem));
    }

    private void frmMonthlyOperatorStatistics_Load(object sender, EventArgs e)
    {
        LoadData();
        LoadDateTo();
    }

} } 它通过零件＆lt; = Convert.ToDateTime（cmbToDate.SelectedItem））在按钮点击方法上产生错误;

Answer 1

我设法得到了解决方案，我只是在btnLoad_clik方法中编写了以下代码。

this.operatorStatDataGridView.DataSource = dc.dailyOperatorStatistics.Where（x =＆gt; x.date＆gt; = Convert.ToDateTime（cmbDate.SelectedItem）＆amp;＆amp; x.date＆lt; = Convert.ToDateTime（cmbToDate.SelectedItem）））;

并将loadToDate方法更改为此

private void LoadDateTo（） { cmbToDate.DataSource = dc.dailyOperatorStatistics.Select（x =＆gt; x.date）; cmbToDate.DisplayMember =“date”; cmbToDate.ValueMember =“date”;

这已经能够给我所需的结果。

在数据网格视图中显示定期自定义数据

1 个答案: