Question

我有一个dataGridView，其第一列包含复选框。现在根据我的要求，我必须得到Employee No列的值，该行的复选框已被点击另一个按钮点击事件。还有如何获取多个复选框的值被选中。

这是我的代码..

    private void btn_load_Click(object sender, EventArgs e)
    { 
        DataTable dt = new DataTable();
        dt.Columns.Add("Select", System.Type.GetType("System.Boolean"));
        dt.Columns.Add("Employee No");
        dt.Columns.Add("Employee Name");
        dt.Columns.Add("Join Date");

        DataRow dr;

        for (int i = 0; i <= 10; i++)
        {
            dr = dt.NewRow();
            dr["Select"] = false;
            dr["Employee No"] = 1000 + i;
            dr["Employee Name"] = "Employee " + i;
            dr["Join Date"] = DateTime.Now.ToString("dd/MM/yyyy");

            dt.Rows.Add(dr);
        }

        dataGridView1.AllowUserToAddRows = true;
        dataGridView1.AllowUserToDeleteRows = true;
        dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

        dataGridView1.DataSource = dt; 
    } 

    private void btn_Click(object sender, EventArgs e)
    {
        //I need the Employee Id values here
    }

请帮帮我。谢谢。

Answer 1

您还可以使用DataSource属性：

    private void btn_Click(object sender, EventArgs e)
    { 
       int[] employeeIds = (dataGridView1.DataSource as DataTable).Rows
           .Cast<DataRow>()
           .Where(r => (bool)r["Select"])
           .Select(r => Convert.ToInt32(r["Employee No"]))
           .ToArray();
    }

并使用System.Linq命名空间。

Answer 2

因为您已将DataTable绑定到网格DataSource，所以可以使dt成为类变量并使用它来检查选定的变量。

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private DataTable dt;

    private void btn_load_Click(object sender, EventArgs e)
    {
        dt = new DataTable();
        dt.Columns.Add("Select", System.Type.GetType("System.Boolean"));
        dt.Columns.Add("Employee No");
        dt.Columns.Add("Employee Name");
        dt.Columns.Add("Join Date");

        DataRow dr;

        for (int i = 0; i <= 10; i++)
        {
            dr = dt.NewRow();
            dr["Select"] = false;
            dr["Employee No"] = 1000 + i;
            dr["Employee Name"] = "Employee " + i;
            dr["Join Date"] = DateTime.Now.ToString("dd/MM/yyyy");

            dt.Rows.Add(dr);
        }

        dataGridView1.AllowUserToAddRows = true;
        dataGridView1.AllowUserToDeleteRows = true;
        dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

        dataGridView1.DataSource = dt;
    }

    private void btn_Click(object sender, EventArgs e)
    {
        //I need the Employee Id values here
        foreach (DataRow row in dt.Rows)
        {
            if ((bool)row["Select"] == true)
            {

            }
        }
    } 
}

Answer 3

假设在表单类中声明为

的全局变量

List<int> empIDs = new List<int> empIDs();

现在，您可以在点击事件中编写

private void btn_Click(object sender, EventArgs e)
{
    empIDs.Clear();
    foreach(DataGridViewRow r in dgv.Rows)
    {
        DataGridViewCheckBoxCell c = r.Cells["Select"] as DataGridViewCheckBoxCell;
        if(Convert.ToBoolean(c.Value))
            empIDs.Add(Convert.ToInt32(r.Cells["Employee No"].Value));        
    }
}

在click事件结束时，全局变量将填充单击其SELECT单元格的员工的ID

如何在Winform应用程序中获取datagridview的特定单元格的值

3 个答案: