如何使用Value Member选择组合框的索引 [英] How Do I Select Index of combobox using Value Member

问题描述

我使用字典填充组合框。每次索引更改时，我都会使用messagebox来显示组合框的值。示例输出是[100，Apple]

另一个[101，Banana]。我想要完成的是当我在文本框中输入100并单击按钮时，组合框索引将自动选择[100，Apple]的索引，如果我输入101，则再次单击该按钮，[101，Banana]的索引将是选择等等。我试图使用combobox.findstring（字符串）但无济于事。

我希望有人知道这个会告诉我正确的方向......



谢谢..

I populate combobox using dictionary. I use messagebox to show value of combobox everytime its index change. Example output is [100, Apple]
another [101, Banana]. What I want to accomplish is when I type 100 in textbox and click a button the combobox index will automatically select the index of [100, Apple] and if I type 101 then click the button again the index of [101, Banana] will be selected and so on. I tried to use combobox.findstring(string) but to no avail.
I'm hoping that someone who knows this will show me the right direction...

Thank you..

推荐答案

请检查aspx页面代码如下=

Please check the aspx page code as below =

<div>
    <asp:textbox id="TextBox1" runat="server" xmlns:asp="#unknown"></asp:textbox>
    <asp:button id="Button1" runat="server" text="Button" onclick="Button1_Click" xmlns:asp="#unknown" />
    <asp:dropdownlist id="DropDownList1" runat="server" datasourceid="SqlDataSource1" datatextfield="Name" datavaluefield="Id" xmlns:asp="#unknown"></asp:dropdownlist>
    <asp:sqldatasource runat="server" id="SqlDataSource1" connectionstring="<%

ConnectionStrings：LOC_MASTERConnectionString％> selectcommand = SELECT [Id]，[Name] FROM [Fruit] xmlns：asp = ＃unknown >
< / asp：sqldatasource >
< / div >

ConnectionStrings:LOC_MASTERConnectionString %>" selectcommand="SELECT [Id], [Name] FROM [Fruit]" xmlns:asp="#unknown"> </asp:sqldatasource> </div>

请检查背后的代码=

Please check the code behind =

protected void Button1_Click(object sender, EventArgs e)
	{
		DropDownList1.SelectedValue = TextBox1.Text;
	}

在数据绑定之后，您可以找到该值并进行设置。

After databind you can find the value and set it.

protected void dl_DataBound(object sender, EventArgs e) {
    dl.Items.FindByValue(val).Selected = true;
}

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