如何获取和传递值从GridView到GridView中的DropDownList调用的方法？

异步

我有以下内容，GridView其中包含，DropDownList它基于调用方法SelectedValue：

在其中选择正在取得的行，我怎么得到Customer ID来自GridView它作为参数传递给方法被调用下面？

码：

<asp:GridView ID="grdLoadData" AutoGenerateColumns="false" runat="server">

<Columns>
<asp:TemplateField HeaderText="Example">
<ItemTemplate>
<asp:DropDownList ID="ddlExampleDropDownList"  runat="server" 
     AutoPostBack="true" Width="100" 
    OnSelectedIndexChanged="ddlExampleDropDownList_SelectedIndexChanged">
    <asp:ListItem Text="---- Select --" Value="select" />
    <asp:ListItem Text="Do Task A" Value="Task A" />
    <asp:ListItem Text="Do Task B" Value="Task B" />
</asp:DropDownList> 
</ItemTemplate>
</asp:TemplateField>

<asp:BoundField DataField="LAST_NAME" HeaderText="Last Name" />
<asp:BoundField DataField="FIRST_NAME" HeaderText="First Name" />
<asp:BoundField DataField="MiDDLE_NAME" HeaderText="Middle Name" />

<asp:TemplateField HeaderText="Customer ID">
<ItemTemplate>
<asp:Label ID="lblCustomerID" Text='<%#Eval("CUST_ID") %>' runat="server" />
</ItemTemplate>
</asp:TemplateField>

</Columns>
</asp:GridView>

背后的代码：

    public string DoTaskA(string customerId)
    {
        return customerId;
    }

    public string DoTaskB(string customerId)
    {
        return customerId;
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            LoadData();
        }  
    }

    protected void ddlExampleDropDownList_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList dropDownList = (DropDownList)sender;
        GridViewRow gridViewRow = (GridViewRow)dropDownList.Parent.Parent;

         if(dropDownList.SelectedValue=="Task A")
         {
             //Pass Customer ID here
             DoTaskA();
         }
         else if(dropDownList.SelectedValue=="Task B")
         {
             //Pass Customer ID here
             DoTaskB();
         }
    }

Keval Gangani |

我建议您将“ CustID”作为属性添加到DropDownList控件中，如下所示：

<asp:DropDownList ID="ddlExampleDropDownList"  runat="server" 
 AutoPostBack="true" Width="100" CustID='<%#Eval("CUST_ID") %>'
OnSelectedIndexChanged="ddlExampleDropDownList_SelectedIndexChanged">
<asp:ListItem Text="---- Select --" Value="select" />
<asp:ListItem Text="Do Task A" Value="Task A" />
<asp:ListItem Text="Do Task B" Value="Task B" />

并在SelectedIndexChanged事件中获取CustomerID应该是这样的：

protected void ddlExampleDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
    DropDownList dropDownList = (DropDownList)sender;
    GridViewRow gridViewRow = (GridViewRow)dropDownList.Parent.Parent;

    string lsCustomerID = Convert.ToString(dropDownList.Attributes["CustID"]);

     if(dropDownList.SelectedValue=="Task A")
     {
         //Pass Customer ID here
         DoTaskA(lsCustomerID);
     }
     else if(dropDownList.SelectedValue=="Task B")
     {
         //Pass Customer ID here
         DoTaskB(lsCustomerID);
     }
}

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