ASP.NET 4.0中的下拉列表 [英] Dropdown list in ASP.NET 4.0

问题描述

嗨朋友们，



其实我的疑问是，如何在用sps填充ddl之后将新文本添加到ddl中？



让我问清楚，



i填充了角色表中的数据到下拉列表..

但仍然我想把--ALL--项添加到ddlst怎么样？



如何通过c＃编码将--ALL-- item添加到ddslt？



等待回复

hi friends,

actually my doubt is, how to add new text into ddl after populate the ddl by sps?

let i ask clearly,

i was populate the datas from rolemaster table in to dropdownlist..
but still i wanna add --ALL-- item to ddlst how?

how to add --ALL-- item to ddslt by c# coding?

am waiting for as soon as reply

推荐答案

Dropdownlist1.Items.Insert（0， - ALL - ）;



在从collection / db绑定值之后添加如下。

Dropdownlist1.Items.Insert(0,"-ALL-");

Add like this after binding values from collection/db.

C＃：

C#:

DataSet ds;

DataTable dt;

DataRow newRow;

// get the drop down values from the SP as a dataset
ds = webService.getMyDDLValues();

// now add the values to the drop down list
if ((ds.Tables.Count > 0) && (ds.Tables[0].Rows.Count > 0))
{
        // grab the table from the dataset
        dt = ds.Tables[0];

        // create the new row
        newRow = dt.NewRow();

    // specify the select item's value
        newRow["SELECT_VALUE"] = "-1";

        // specify the text to show in the drop down
        neRow["SELECT_TEXT"] = "--ALL--";

    // add the row at position 0
        dt.Rows.InsertAt(newRow, 0);

        // now bind the table to the control
        myDDL.DataSource = dt;
        myDDL.DataBind();
}

ASP.NET：

ASP.NET:

<asp:DropDownList CssClass="myDDLClass" ID="myDDL" DataValueField="SELECT_VALUE" DataTextField="SELECT_TEXT" runat="server" ></asp:DropDownList>

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