Question

我已经以编程方式向DataGridView添加了登录按钮。我想从数据库检查字段登录时间，如果它为空，则按钮名称应为login，否则它的名称应为logout。

private void frmAttendance_Load(object sender, EventArgs e) 
{ 
    GetData();//Fetch data from database 
    DataGridViewButtonColumn buttonLogin = new DataGridViewButtonColumn(); 
     buttonLogin.Name = "Login"; 
    buttonLogin.Text = "Login"; 
    buttonLogin.UseColumnTextForButtonValue = true; 
    dataGridView1.Columns.Add(buttonLogin); 
    // Add a CellClick handler to handle clicks in the button column. 
    dataGridView1.CellClick += new DataGridViewCellEventHandler(dataGridView1_CellClick); 
}

Answer 1

要添加按钮列，您可以：

var button=new DataGridViewButtonColumn();
button.Name="LoginButton";
button.HeaderText="Login";
button.Text = "Login";
button.UseColumnTextForButtonValue = true;

this.dataGridView1.Columns.Add(button);

动态设置按钮列的文本

要在每个按钮上显示“登录”文字，它足以设置：

button.Text = "Login";
button.UseColumnTextForButtonValue = true;

此外，如果您需要为按钮设置不同的文字，则可以使用CellFormatting DataGridView事件并设置这些单元格的值：

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    //If this is header row or new row, do nothing
    if (e.RowIndex < 0 || e.RowIndex == this.dataGridView1.NewRowIndex)
        return;

    //If formatting your desired column, set the value
    if (e.ColumnIndex=this.dataGridView1.Columns["LoginButton"].Index)
    {
        //You can put your dynamic logic here
        //and use different values based on other cell values, for example cell 2
        //this.dataGridView1.Rows[e.RowIndex].Cells[2].Value
        e.Value = "Login";
    }
}

您应该将此处理程序分配给CellFormating事件：

this.dataGridView1.CellFormatting += dataGridView1_CellFormatting;

Answer 2

您可以循环播放DataGridView：

foreach(DataGridViewRow row in dataGridView1.Rows)
{
    DataGridViewCell cell = row.Cells[0] //Button column index.
    //Put your data logic here.
    cell.Value = "Login";
}

但在这种情况下，您必须知道DataGridViewButtonColumn

的列索引

如何动态地将按钮名称和文本添加到gridview按钮？

2 个答案: