在网格视图中查找下拉菜单的选定项目值 [英] Finding selected items value of drop down inside grid view

问题描述

大家好，
我有一个网格视图.内部网格视图中我已经接受了模板字段，并且在其中放置了下拉列表.我在行数据绑定事件上填充了下拉列表.现在我的问题是我想在选定索引更改上选择项目值list.so的下拉列表，所以当我从下拉列表中选择任何项目时如何获取其选定的值.



网格视图中填充下拉菜单的编码

Hello All,
I have a grid view.Inside grid view i have taken template field and i have put drop down list in it.I am filling drop down list on row data bound event.Now my problem is that i want select items value on selected index change of drop down list.so when i select any item from drop down list how to get its selected value.



coding of filling drop down inside grid view

 DataRowView r = e.Row.DataItem as DataRowView;
                if (e.Row.RowType == DataControlRowType.DataRow)
                {
                   
                        DropDownList drptype1;
                        drptype1 = (DropDownList)(e.Row.FindControl("drpitem"));
                        DataSet fill = objitem.get_all_details();
                        drptype1.DataSource = fill.Tables[0];
                        drptype1.DataTextField = "item_name";
                        drptype1.DataValueField = "item_id";
                        drptype1.DataBind();
                        drptype1.Items.Insert(0, new ListItem("Select", "-1"));
}

那么如何获取其选择的值

so how to get its selected value

推荐答案

drptype1.SelectedItem.Value返回是什么

what is drptype1.SelectedItem.Value returning

我假设您想要一个事件处理程序当用户在GridView内的DropDownList 中选择一个值时，将在CodeBehind中执行该方法.为此，我有以下建议:

后行

I assume you want an event handler method to be executed in the CodeBehind when user selects a value in the DropDownList inside the GridView. To do this, I have the following suggestions:

After the line

DropDownList drptype1;
drptype1 = (DropDownList)(e.Row.FindControl("drpitem"));

添加以下代码行，以将SelectedIndexChanged 事件处理程序添加到DropDownList:

Add the following line of code to add a SelectedIndexChanged event handler to the DropDownList:

drptype1.SelectedIndexChanged += new EventHandler(DropDownList_SelectedIndexChanged);

并且，如下所示在CodeBehind中定义EventHandler DropDownList_SelectedIndexChanged:

And, define the EventHandler DropDownList_SelectedIndexChanged in the CodeBehind as follows:

void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
        DropDownList ddl = sender as DropDownList;
        if (ddl != null)
        {
            string selectedValue = ddl.SelectedItem.Value;
            string selectedText = ddl.SelectedItem.Text;
        }
}

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