使用DataGridView显示DataTable的内容-Java 学习之路

我有一个三列DataTable，其中包含我需要以各种方式使用的数据 . 此DataTable中的数据来自Exchange Web服务调用 . 第一列包含行计数器，第二列包含日历名称，第三列包含日历ID（这是一个看起来像胡言乱语的字符串） .

在DataGridView中显示原始数据非常简单 . 但是我想要DataGridView的第二列是不同的：我想显示一些文本（“复制”），而不是显示日历ID，当单击时，它会将日历ID复制到用户的剪贴板 . 理想情况下，它的样式就像一个超链接，因此用户知道它不仅仅是一个盒子里的某些文字 . 可以想象，这可以通过带有事件处理程序的DataGridViewLinkColumn类型来完成 .

我遇到麻烦的部分是填充行 .

以下代码设置列很好 . 但它没有填充行 .

private static DataGridView CreateCalendarGridView(DataTable calendarTable)
{
    //Bind to the data source
    var calendarGridView = new DataGridView();
    //calendarGridView.AutoGenerateColumns = false;
    calendarGridView.AutoSize = false;
    calendarGridView.DataSource = calendarTable;
    calendarGridView.ColumnHeadersVisible = true;

    //Create counter column
    var counterColumn = new DataGridViewTextBoxColumn();
    counterColumn.DataPropertyName = COUNTER_COLUMN_NAME;
    counterColumn.Name = COUNTER_COLUMN_NAME;
    counterColumn.HeaderText = COUNTER_COLUMN_LABEL;

    //Create the Calendar name column
    var calendarNameColumn = new DataGridViewTextBoxColumn();
    calendarNameColumn.DataPropertyName = CALENDAR_COLUMN_NAME;
    calendarNameColumn.Name = CALENDAR_COLUMN_NAME;
    calendarNameColumn.HeaderText = CALENDAR_COLUMN_LABEL;

    //Create the Copy ID hyperlink column
    var copyIdLinkColumn = new DataGridViewLinkColumn();
    copyIdLinkColumn.DataPropertyName = ID_COLUMN_NAME;
    copyIdLinkColumn.Name = ID_COLUMN_NAME;
    copyIdLinkColumn.HeaderText = ID_COLUMN_NAME;
    copyIdLinkColumn.UseColumnTextForLinkValue = false;
    copyIdLinkColumn.TrackVisitedState = true;
    copyIdLinkColumn.LinkColor = Color.Blue;
    copyIdLinkColumn.VisitedLinkColor = Color.Purple;
    copyIdLinkColumn.LinkBehavior = LinkBehavior.HoverUnderline;
    copyIdLinkColumn.Text = "Copy";
    copyIdLinkColumn.UseColumnTextForLinkValue = true;

    calendarGridView.Columns.Add(counterColumn);
    calendarGridView.Columns.Add(calendarNameColumn);
    calendarGridView.Columns.Add(copyIdLinkColumn);



    //I feel like I'm missing a foreach row in the DataTable which would
    //create the row of cells, but I'm not sure, because isn't that the
    //point of the calendarGridView.DataSource assignment above?



    return calendarGridView;
}

我觉得如果我可以填充行，我可以弄清楚如何更改可点击的第三列的行为 .

我究竟做错了什么？

2 回答

我做了一个工作样本 . 如果有帮助，请选择答案 .

public partial class CalendarTable_Stage1 : Form
{
    public CalendarTable_Stage1()
    {
        InitializeComponent();

        this.Controls.Add(makeDGV(DT));
    }

    DataTable DT
    {
        get
        {
            //Sample DataTable
            DataTable dtb = new DataTable();
            dtb.Columns.Add("empName");
            dtb.Columns.Add("empAddress");
            dtb.Rows.Add("Salim", "S.10, Santhi Nagar, Palakkad");
            dtb.Rows.Add("Manaf", "Thriveni, English church road, Palakkad");
            dtb.Rows.Add("Mohsin Khan", "Civil Nagar, Palakkad");

            return dtb;
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {

    }

    DataGridView makeDGV(DataTable dt)
    {
        DataGridView dgv = new DataGridView();
        // set dgv properties

        dgv.Size = new Size(300, 400);
        dgv.Columns.Add("empName", "Name");

        DataGridViewLinkColumn linkCol = new DataGridViewLinkColumn();
        linkCol.HeaderText = "Address";
        linkCol.Name = "empAddress";
        dgv.Columns.Add(linkCol);
        dgv.AllowUserToAddRows = false; // This will greatly increase adding speed

        dgv.CellContentClick += new DataGridViewCellEventHandler(dgv_CellContentClick);

        foreach (DataRow row in dt.Rows)
        {
            DataGridViewLinkCell_Mine linker = new DataGridViewLinkCell_Mine();
            linker.Value = "Copy";
            linker.data = row[1].ToString();

            DataGridViewTextBoxCell cell = new DataGridViewTextBoxCell();
            cell.Value = row[0].ToString();
            dgv.Rows.Add();

            if (!dgv.AllowUserToAddRows)
            {
                dgv[0, dgv.Rows.Count - 1] = cell;
                dgv[1, dgv.Rows.Count - 1] = linker;
            }
            else
            {
                dgv[0, dgv.Rows.Count - 2] = cell;
                dgv[1, dgv.Rows.Count - 2] = linker;
            }

        }

        return dgv;
    }

    class DataGridViewLinkCell_Mine : DataGridViewLinkCell
    {
        public string data = "";
    }

    void dgv_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {
        if (e.ColumnIndex == 1)
        {
            DataGridView dgv = (DataGridView)sender;
            DataGridViewLinkCell_Mine cell = (DataGridViewLinkCell_Mine)dgv[e.ColumnIndex, e.RowIndex];
            Clipboard.SetText(cell.data);


            MessageBox.Show(Clipboard.GetText());
        }
    }


}

回复于 2024-04-29T05:30:27+08:00

这可能会回答您的部分问题 . 如果您将使用数据表自动更新数据库，您可能希望保留数据表，而不是向其添加列 . 在这种情况下，您将超链接列添加到datagridview而不是绑定表 . 你不需要foreach . 这是一个例子：

//populate the data table dt
    //...

    //bind
    calendarGridView.DataSource = dt;

    //add a new link column (with some properties...) to the gridview
    DataGridViewLinkColumn copyIDLinkColumn = new DataGridViewLinkColumn();

    copyIDLinkColumn.UseColumnTextForLinkValue = true;
    copyIDLinkColumn.HeaderText = "Copy";
    copyIDLinkColumn.ActiveLinkColor = Color.White;
    copyIDLinkColumn.LinkBehavior = LinkBehavior.SystemDefault;
    copyIDLinkColumn.LinkColor = Color.Blue;
    copyIDLinkColumn.TrackVisitedState = true;
    copyIDLinkColumn.VisitedLinkColor = Color.Red;

    calendarGridView.Columns.Add(copyIDLinkColumn);
    copyIDLinkColumn.Text = "Click Me"; //Set it once as a default for all cells in col.

    //...

    // Event to handle column click (needs to be wired from designer for example)
    private void dataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {
    //copy some data to clipboard...
    System.Windows.Forms.Clipboard.SetText(e.RowIndex.ToString());
    MessageBox.Show(e.RowIndex.ToString());

    }

回复于 2024-04-29T05:30:27+08:00

使用DataGridView显示DataTable的内容

2 回答

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