小编syd*_*ynn的帖子

我如何循环执行此操作.

protected void ddlTool_SelectedIndexChanged(object sender, EventArgs e)
{

    lblTool1.Visible = false;
    txtTool1.Visible = false;
    lblTool2.Visible = false;
    txtTool2.Visible = false;
    lblTool3.Visible = false;
    txtTool3.Visible = false;
    lblTool4.Visible = false;
    txtTool4.Visible = false;
    lblTool5.Visible = false;


    if (ddlTool.SelectedValue == "1")
    {
        lblTool1.Visible = true;
        txtTool1.Visible = true;
    }
    if (ddlTool.SelectedValue == "2")
    {
        lblTool1.Visible = true;
        txtTool1.Visible = true;
        lblTool2.Visible = true;
        txtTool2.Visible = true;
    }
    if (ddlTool.SelectedValue == "3")
    {
        lblTool1.Visible = true;
        txtTool1.Visible = true;
        lblTool2.Visible = true;
        txtTool2.Visible …