Question

我正在制作一个数据库来存储以前的项目，因为我正在清理我的硬盘。

我目前正在使用DataGrid存储所有信息，我有一个链接部分。我希望链接部分突出显示，所有文件都有不同的URL，所以我不能使用OnClick Process.Start。我找到了许多我尝试过的无法使用的教程。

以下是代码。它有3列，试图将URL放在最后。当我单击列中的URL时，我希望它能够加载浏览器并打开网站。

public Form1()
{
    InitializeComponent()
    dataGridView1.Rows.Add
    (
        "TrustEditz",
        "GTA",
        "http://www.mediafire.com/download/e4qd1r5r4170onj/Vert.rar"
    );  
}




 private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {
        /// This object will have the link text in it
        // It's important to note that we are casting DataGridViewCell Class to
        // sender object
        var theComponent = (DataGridViewCell)sender;
        var val = (string)theComponent.Value.ToString(); // Or theComponent.Value.ToString();

        if (val == (string)theComponent.Value.ToString())
        {



        switch (val)
        {
            case "http://www.mediafire.com/download/e4qd1r5r4170onj/Vert.rar":
                Process.Start("http://www.mediafire.com/download/e4qd1r5r4170onj/Vert.rar");
                break;
            default:

                break;
        }
      }
    }

我的应用程序中仍然出现Unhandeled异常。如果单击“继续...”

Answer 1

单击链接（或单元格/行）时，您需要将事件绑定到该操作。所以

void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
    // Check that it is a valid row and it was in column #3 0 based indexing 
    if (!dataGridView1.CurrentCell.ColumnIndex.Equals(2) || e.RowIndex == -1) 
    {
        return;
    }
    // Check if the current cell is not null and that the value is not null 
    if (dataGridView1.CurrentCell == null || dataGridView1.CurrentCell.Value == null) 
    { 
        return; 
    }

    // ******EDIT******
    // Before I said to cast the DataGridViewCell Object
    // This is wrong, since the sender is the DataGrid itself not the cell object
    // Below the code is using the variable e to reference the events row index
    var theRow = dataGridView1?.Rows?[e.RowIndex];
    var theCell = theRow?.Cells?[2];
    var val = theCell?.Value?.ToString();

    if (string.IsNullOrEmpty(val))
    { 
        MessageBox.Show("The cell value is not assigned");
        return;
    }

    switch(val) 
    {
       case "http://www.mediafire.com/download/e4qd1r5r4170onj/Vert.rar":
           // Do something
           break;
       default:
           break;
    }
}

这里的关键是你将点击动作与特定的单元格内容取消关联。

DataGridView URL超链接

1 个答案: