为什么点击Button会将动态生成的DropDownList中不绑定的数据清空？

2013-01-16 04:03:48 123 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Unity开发效率神器：NaughtyAttributes属性扩展包详解与应用在Unity开发中，Inspector面板的定制化是提升工作效率的关键环节。传统方式需要编写大量自定义编辑器代码，过程繁琐且维护成本高。通过引入C# Attribute（特性）机制，可以实现声明式的UI配置，其原理是利用Unity编辑器在编译后处理阶段动态修改字段的绘制逻辑。这种属性驱动开发模式的核心技术价值在于显著降低代码侵入性，将UI表现与数据结构紧密绑定，让开发者能更专注于游戏逻辑与内容创作。其应用场景广泛，特别适用于快速迭代的UI配置、复杂的状态依赖型界面以及ScriptableObject数据配置阅读详情



  for (int i = 0; i < temp; ++i)

        {

            this.NewTableRow(i);

        }



  protected void NewTableRow(int i)

    {

        TableRow tr = new TableRow();

       

        TableCell tc;

        TextBox tb;

        Label td;

        DropDownList tl;



        int rowqty = i + 1;



        tc = new TableCell();

        td = new Label();

        td.CssClass = "FieldStyle";

        td.ID = "txtDel" + i;

        

        td.Text = "" + rowqty;

        tc.Controls.Add(td);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle"; 

        tb.ID = "txtItemno" + i;

        tb.Attributes.Add("ondblclick", "getItem('" + i + "');");

        tb.Attributes.Add("onclick", "getSelect('txtItemno"+ i + "');");

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        

        tb.CssClass = "FieldStyle";

        tb.TextMode = TextBoxMode.MultiLine;

        tb.Rows = 2;

        tb.ID = "txtDes" + i;

        tb.Attributes.Add("onblur", "getfu('txtDes" + i + "');");

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtModel" + i;

        tb.Attributes.Add("onblur", "getfu('txtModel" + i + "');");

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtQty" + i;

        tb.Attributes.Add("onblur", "getsum('txtQty" + i + "');");

        tb.Attributes.Add("onclick", "getSelect('txtQty" + i + "');");

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtUOM" + i;

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        //tb.ReadOnly = true;

        tb.ID = "txtDate" + i;

        tb.Attributes.Add("onclick","SelectDate(this,'yyyy-MM-dd')");

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtUPrice" + i;

        tb.Attributes.Add("onblur", "getsum('txtUprice" + i + "');");

        tb.Attributes.Add("onclick", "getSelect('txtUprice" + i + "');");

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);





        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtAccount" + i;

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtQuote" + i;

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);



        /*tc = new TableCell();

        tb = new TextBox();

        tb.CssClass = "FieldStyle";

        tb.ID = "txtBuyer" + i;

        tb.ReadOnly();

        tc.Controls.Add(tb);

        tr.Cells.Add(tc);*/



        tc = new TableCell();



        tl = new DropDownList();

        tl.CssClass = "FieldStyle";

        tl.ID = "txtBuyer" + i;

       // tl.Style.Add("height", "21px");

        for (int j = 0; j < tBuyer.Length; j++)

        {

            if (tBuyer[j]=="" | tBuyer[j]==null)

                break;

         tl.Items.Add(new ListItem(tBuyer[j],tBuyer[j]));

        }

        tr.Cells.Add(tc);

        tc.Controls.Add(tl);







        //DropDownList("txtBuyer" + i).DataSource = tBuyer;

        //DropDownList("txtBuyer" + i).DataBind();

       // Enumerable.Range(1, 10).Select("txtBuyer" + i).ToList().ForEach(tl.Items.Add(i));

 





        this.m_table.Rows.Add(tr);



    }





    protected void btnAddDetail_Click(object sender, EventArgs e)

    {

       

            this.NewTableRow(this.Num++);

            Label1.Text = this.Num.ToString();

       

    }