c# - 在每次单击按钮时添加行数据 GridView

Question

我在 usercontrol 上有一个 datagridview。我创建了一个数据表，并将数据网格的源设置为此数据表。我希望在运行时能够在每次单击按钮时在 gridview 上添加我想要的行数。

我的代码:

 private DataTable CreateTable()
    {
        Datatable table=new Datatable();
        table.Columns.Add("Name".ToString());
        table.Columns.Add("Size".ToString());
        DataRow dr = table.NewRow();
        dr["Name"] = "Mike";
        DataRow dr2 = table.NewRow();
        dr2["Name"] = "Ryan;
        DataRow dr3 = table.NewRow();
        dr3["Name"] = "Taylor";
        dr["Size"] = " one";
        dr2["Size"] = "two";
        table.Rows.Add(dr);
        table.Rows.Add(dr2);
        table.Rows.Add(dr3);
        return table;
     //and on my constructor I set gridview.DataSource=Datatable;
    }

 //Code  on the event:
 private void button_Click(object sender, EventArgs e)
    {

        DataRow NewRow = table.NewRow();
        table.Rows.Add(NewRow);
    }

Answer 1

您需要在表单级别定义DataTable。然后在按钮点击你可以做:

private void button_Click(object sender, EventArgs e)
{
    DataRow NewRow = table.NewRow();
    table.Rows.Add(NewRow);
    gridview.DataSource=table; //specify the source
}

在表单级别定义表格:

DataTable table; //DataTable at form level

private DataTable CreateTable()
{
    table=new Datatable(); //here insntianting the form level table. 
    table.Columns.Add("Name".ToString());
    table.Columns.Add("Size".ToString());
    DataRow dr = table.NewRow();
    dr["Name"] = "Mike";
    DataRow dr2 = table.NewRow();
    dr2["Name"] = "Ryan;
    DataRow dr3 = table.NewRow();
    dr3["Name"] = "Taylor";
    dr["Size"] = " one";
    dr2["Size"] = "two";
    table.Rows.Add(dr);
    table.Rows.Add(dr2);
    table.Rows.Add(dr3);
    return table;
 //and on my constructor I set gridview.DataSource=Datatable;
}