如何在转发器中的Web用户控件中填充下拉列表 [英] how to populate dropdownlist in web user control in a repeater

问题描述

大家好，



我有用户控制权，其中包含：

一个下拉列表na文本框。



i必须填充用户控件中的下拉列表n必须写入onselectedindexchange来填充用户控制它自己的事件的文本框。



n



我将这个Web用户控件放在ASP.NET的转发器中。



i努力填充用户控件的cs文件中的下拉列表

但它无效。



Plzzz给出一些建议/帮助我...

 protected void Repeater2_ItemDataBound（object sender，RepeaterItemEventArgs e）
 {
 int index = 0; 
 if（Repeater1.Items [index] .ItemType == ListItemType.Item || Repeater1.Items [index] .ItemType == ListItemType.AlternatingItem）
 {
 if（Repeater1.Items [索引] .FindControl（Repeater2）！= null）
 {
 
 Repeater r = Repeater1.Items [index] .FindControl（Repeater2）作为Repeater; 
 
 foreach（r.Items中的RepeaterItem项目）
 {
 UserControl u =（UserControl）item.FindControl（SubChemicals1）; 
 
 if（u！= null）
 {
 
 // if（e.Item.ItemType == ListItemType.Item || e.Item.ItemType = = ListItemType.AlternatingItem）
 // {
 DropDownList d =（DropDownList）u.FindControl（ddlchemicals）; 
 d.DataTextField =CName; 
 d.DataValueField =RecID; 
 d.DataSource = bl.Fill_DDL（Sp_GetSubChemicals）; 
 d.DataBind（）; 
 d.Items.Insert（0，new ListItem（--- Select ---，0））; 
 
 
 //} 
} 
 
} 
} 
} 
} 

我知道了，但事情是，我有更多的嵌套转发器

这个下拉列表所在的位置

仅在第一个嵌套转发器中填充但不包含其他转发器....



谢谢

解决方案

int index = 0;



它解释了你的问题。

我也觉得你的ItemDataBound事件都错了。

 受保护  void  Repeater2_ItemDataBound（ object  sender，RepeaterItemEventArgs e）
 {
  if （e.Item.ItemType！= ListItemType.Item 
& ;& e.Item.ItemType！= ListItemType.AlternatingItem）
 {
  return ; 
} 
 
 
 UserControl u =（UserControl）e.item.FindControl（  SubChemicals1）; 
 
  if （u！=  null ）
 {
 
 DropDownList d =（DropDownList）u.FindControl（  ddlchemicals）; 
 d.DataTextField =   CName; 
 d.DataValueField =   RecID; 
 d.DataSource = bl.Fill_DDL（  Sp_GetSubChemicals）; 
 d.DataBind（）; 
 d.Items.Insert（ 0 ， new  ListItem（  ---选择---，  0\" ））; 
 
 
} 
 
 
} 

嗨Subhan，请尝试使用此代码
 
 <   pre  < span class =code-attribute>   lang   =  c＃ >  protected void Repeater2_ItemDataBound（object sender，RepeaterItemEventArgs e）
 {
 if（e.Item） .ItemType！= ListItemType.Item 
&& e.Item.ItemType！= ListItemType.AlternatingItem）
 UserControl u =（UserControl）e.item.FindControl（SubChemicals1）; 
 
 if（u！= null）
 {
 
 DropDownList d =（DropDownList）u.FindControl（ddlchemicals）; 
 d.DataTextField =CName; 
 d.DataValueField =RecID; 
 d.DataSource = bl.Fill_DDL（Sp_GetSubChemicals）; 
 d.DataBind（）; 
 d.Items.Insert（0，new ListItem（--- Select ---，0））; 
} 
 
} <   / pre  >  

Hi guys,

I have user control which contains:
one dropdownlist n a textbox.

i have to populate the dropdownlist in the user control n have to write the "onselectedindexchange" to fill the textbox which in the user control it self., event.

n

i'm placing this web user control in a repeater in ASP.NET.

i tried hard to populate the dropdownlist in the cs file of the user control
but its not working.

Plzzz give some suggestions/help me...

protected void Repeater2_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            int index = 0;
            if (Repeater1.Items[index].ItemType == ListItemType.Item || Repeater1.Items[index].ItemType == ListItemType.AlternatingItem)
            {
                if (Repeater1.Items[index].FindControl("Repeater2") != null)
                {

                    Repeater r = Repeater1.Items[index].FindControl("Repeater2") as Repeater;

                    foreach (RepeaterItem item in r.Items)
                    {
                        UserControl u = (UserControl)item.FindControl("SubChemicals1");

                        if (u != null)
                        {

                            //if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
                            //{
                                DropDownList d = (DropDownList)u.FindControl("ddlchemicals");
                                d.DataTextField = "CName";
                                d.DataValueField = "RecID";
                                d.DataSource = bl.Fill_DDL("Sp_GetSubChemicals");
                                d.DataBind();
                                d.Items.Insert(0, new ListItem("---Select---", "0"));

                                
                            //}
                        }

                    }
                }
            }
        }

I got it, but the things is, i have morethan one nested repeaters
where this dropdownlist is located n
its filling only in the 1st nested repeater only but not other repeaters....

Thanks

解决方案

int index = 0;

It explains your issue.
I also feel like you got the ItemDataBound event all wrong.

protected void Repeater2_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            if (e.Item.ItemType != ListItemType.Item
                && e.Item.ItemType != ListItemType.AlternatingItem)
            {
                return;
            }


            UserControl u = (UserControl)e.item.FindControl("SubChemicals1");

            if (u != null)
            {

                    DropDownList d = (DropDownList)u.FindControl("ddlchemicals");
                    d.DataTextField = "CName";
                    d.DataValueField = "RecID";
                    d.DataSource = bl.Fill_DDL("Sp_GetSubChemicals");
                    d.DataBind();
                    d.Items.Insert(0, new ListItem("---Select---", "0"));


            }


        }

Hi Subhan, Please try with this code

<pre lang="c#">protected void Repeater2_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            if (e.Item.ItemType != ListItemType.Item
                && e.Item.ItemType != ListItemType.AlternatingItem)
 UserControl u = (UserControl)e.item.FindControl("SubChemicals1");

            if (u != null)
            {

                    DropDownList d = (DropDownList)u.FindControl("ddlchemicals");
                    d.DataTextField = "CName";
                    d.DataValueField = "RecID";
                    d.DataSource = bl.Fill_DDL("Sp_GetSubChemicals");
                    d.DataBind();
                    d.Items.Insert(0, new ListItem("---Select---", "0"));
             }

        }</pre>

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