如何在windows application.along中的组合框中添加默认值--select--并添加数据源。 [英] How to add default value --select-- in combobox in windows application.along with adding datasource.

问题描述

hI

我必须将excel数据上传到mysql数据库抛出Windows窗体应用程序。我把comboboexs用来访问excel表的列名。

i将所有列绑定到所有组合框但是我需要在组合框列表的开头插入--select--

combobox1.DataSource = dt;

combobox1.ValueMember = ORDINAL_POSITION;

combobox1.DisplayMember = COLUMN_NAME;

combobox1.BindingContext = new BindingContext（） ;





up up它很好，但我想在列表的开头插入--select--

i添加它

combobox.Items.Insert（0，new ListItem（Select，0））;



但它显示的错误就像你分配数据源一样，你不能改变数据。





如何解决问题。

请告诉我。

解决方案

如何使用for循环填充组合框中的年份 [ ^ ]





http://forums.asp.net/t/1232340 .aspx / 1 [ ^ ]

hI
I have to upload excel data to mysql database throw windows forms application. i put comboboexs to access column names of excel sheet.
i bind all columns to the all comboboxes but i need to insert --select-- in starting of combobox list.
combobox1.DataSource = dt;
combobox1.ValueMember = ORDINAL_POSITION;
combobox1.DisplayMember =COLUMN_NAME;
combobox1.BindingContext = new BindingContext();


up tothis it is fine but i wonts to insert --select-- in starting of list.
i added it by
combobox.Items.Insert(0, new ListItem("Select", "0"));

but it showing error like this u cannot change data once u assign datasource.


how to solve the problem.
please tell me.

解决方案

Hi,

how to fill year in combobox with using for loop[^]


http://forums.asp.net/t/1232340.aspx/1[^]

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