如何在GridView中添加CheckBox字段？

Question

如何以編程方式在gridview中添加復選框字段，我的代碼有什么問題？

try
{
  string Data_source=@"Data Source=A-63A9D4D7E7834\SECOND;";
  string Initial_Catalog=@"Initial Catalog=replicate;";
  string User=@"User ID=sa;";
  string Password=@"Password=two";
  string full_con=Data_source+Initial_Catalog+User+Password;
  SqlConnection connection = new SqlConnection(full_con);
  connection.Open();
  SqlCommand numberofrecords = new SqlCommand("SELECT COUNT(*) FROM dbo.Table_1", connection);
  DataSet ds2 = new DataSet();
  SqlDataAdapter testadaptor = new SqlDataAdapter();
  testadaptor.SelectCommand = new SqlCommand("SELECT COUNT(*) FROM dbo.Table_1", connection);
  testadaptor.Fill(ds2);
  grid1.DataSource = ds2;
  CheckBoxField c = new CheckBoxField();
  grid1.Columns.Add(c);
  grid1.DataBind();
  numberofrecords.Dispose();
  connection.Close();
  connection.Dispose();
}
catch (Exception a)
{
  Response.Write("Please check  ");
   Response.Write(a.Message.ToString());
   Response.Write(a.Source.ToString());
}//catch

Answer 1

CheckBoxField可能需要DataField屬性的值。 這應該與查詢中的列名或別名匹配。 （不過，我認為復選框不會與數字結果一起使用。）

編輯：沒意識到你想做什么。 模板字段和常規復選框應使您更接近所需的內容。 像這樣嗎

例如

const int ColumnSelect = 0;

protected void Page_Load(object sender, EventArgs e)
{       
    //Get real data here.
    DataTable dt = new DataTable();
    dt.Columns.Add("count");                
    dt.Rows.Add(dt.NewRow());
    dt.Rows[0][0] = "5";

    GridView1.Columns.Add(new TemplateField());        
    BoundField b = new BoundField();
    GridView1.Columns.Add(b);
    b.DataField = "count";
    GridView1.DataSource = dt;
    GridView1.DataBind();
}


protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType != DataControlRowType.Header)
    {            
        e.Row.Cells[ColumnSelect].Controls.Add(new CheckBox());
    }
}

編輯＃2：關於獲取值，您當然可以這樣做。 您在尋找Javascript還是服務器端解決方案？ 如果您單擊按鈕，這是服務器端的一個簡單示例：

protected void Button1_Click(object sender, EventArgs e)
{
    foreach(GridViewRow row in GridView1.Rows)
    {
        //Could also use (CheckBox)row.Cells[ColumnSelect].FindControl if you give the checkboxes IDs when generating them.
        CheckBox cb = (CheckBox)row.Cells[ColumnSelect].Controls[0];

        if (cb.Checked)
        {
            //Do something here.
        }
    }
}

Answer 2

我必須指定哪個復選框對象，像這樣

        System.Web.UI.WebControls.CheckBox

我也必須將其添加到gridview aspx頁面

       OnRowDataBound="GridView1_RowDataBound"