Question

我想获取记录的四个字段的值，然后在sql语句中使用它们。当我单击gridview中的行/记录并将每个值存储在它们自己声明的变量中时，如何获取这4个值？

四个字段名称是course_abbreviation，course_name，month_of_admission和year_of_admission。

public LecturerForm(string lecturer_firstname, string lecturer_lastname, string lecturer_id)
    {
        InitializeComponent();
        string lecturer = lecturer_firstname + " " + lecturer_lastname;
        lblname.Text = lecturer;
        string lecID = lecturer_id;
        string connetionString = null;
        SqlConnection cnn;
        connetionString = "Server=localhost\\SQLEXPRESS;Integrated security=SSPI;database=jms";
        SqlDataAdapter sda = new SqlDataAdapter("Select unit_code, unit_name, course_abbreviation, course_name, group_name from units_allocation where national_id='" + lecID + "' ", connetionString);
        cnn = new SqlConnection(connetionString);
        DataTable dt4 = new System.Data.DataTable();
        sda.Fill(dt4);
        gridControl1.DataSource = dt4;

        gridView1.Columns[0].Caption = "Unit Code";
        gridView1.Columns[1].Caption = "Unit Name";
        gridView1.Columns[2].Caption = "Course Abbr.";
        gridView1.Columns[3].Caption = "Course Name";
        gridView1.Columns[4].Caption = "Group";
    }

private void gridView1_RowClick(object sender, RowClickEventArgs e)
    {

        //code to get values of four fields and store in four variables...(i.e from the question)
    }

Answer 1

在GridView.RowClick事件中，有一个e.RowHandle参数，您可以使用该参数来标识单击的行。然后，使用GridView.GetRowCellValue方法获取该行的单元格值。

object val1;
object val2;
object val3;
object val4;
private void gridView1_RowClick(object sender, RowClickEventArgs e) {
    int rowHandle = e.RowHandle;
    val1 = gridView1.GetRowCellValue(rowHandle, gridView1.Columns[0]);
    val2 = gridView1.GetRowCellValue(rowHandle, gridView1.Columns[1]);
    val3 = gridView1.GetRowCellValue(rowHandle, gridView1.Columns[2]);
    val4 = gridView1.GetRowCellValue(rowHandle, gridView1.Columns[3]);
}

Answer 2

为避免将列拖动到不同位置时出现问题，通常最好按名称引用。

object val1;
object val2;
object val3;
object val4;
private void gridView1_RowClick(object sender, RowClickEventArgs e) {
    int rowHandle = e.RowHandle;
    val1 = gridView1.GetRowCellValue(rowHandle, "course_abbreviation");
    val2 = gridView1.GetRowCellValue(rowHandle, "course_name");
    val3 = gridView1.GetRowCellValue(rowHandle, "month_of_admission");
    val4 = gridView1.GetRowCellValue(rowHandle, "year_of_admission");
}

使用网格视图（在devexpress -visual c＃上）时，如何在单击该记录/行时获取记录的四个字段的值？

2 个答案: