在数据绑定组合框中选择项目 [英] Selecting item in databound combobox

问题描述

简介：

1. 我有一个继承自ComboBox类的构造函数中的一些数据绑定：

 
 var mdl = new Model（）; 
 
 ValueMember =id; 
 DisplayMember =unit; 
 DataSource = mdl.getUnits（）; 
 

1. 然后我有另一个带有editIngridient函数的表单。函式如下：

 
 public bool editIngridient（int id）
 {
 currentId = id; 
 
 var row = mdl.getIngridient（id）; 
 
 txtIngridient.Text =（string）row [ingridient]; 
 cmbUnit.ID =（int）row [unitId]; 
 numNotifyQty.Value =（int）row [notifyQty]; 
 
 ShowDialog（）; 
 
 return true; 
} 
 

1. 现在，当弹出窗体，文本框和数字框填充




2. 如果我将运行combobox数据绑定函数作为editIngridient函数中的第一行 - 一切都很好。

请指向我的愚蠢。

很多！

解决方案

YOu没有说你的dataSource是什么，但我假设DataTable，所以你可以做： p>

  DataRowView rowData = comboBox1.SelectedItem as DataRowView; 
 int id = Convert.ToInt32（rowData [id]）; 
 string name = rowData [unit]。ToString（）; 
  

I believe this question is kinda new-bie, but I can't solve it in correct way.

Brief description:

1. I have an inherited from ComboBox class that does some data bindings in constructor:

    var mdl = new Model();

    ValueMember = "id";
    DisplayMember = "unit";
    DataSource = mdl.getUnits();

All good here. The combobox is filled by required data.

1. Then I have another form with a function editIngridient. The function is following;

    public bool editIngridient(int id)
    {
    currentId = id;

    var row = mdl.getIngridient(id);

    txtIngridient.Text = (string)row["ingridient"];
    cmbUnit.ID = (int)row["unitId"];
    numNotifyQty.Value = (int) row["notifyQty"];

    ShowDialog();

    return true;
    }

1. Now, when the form popups, textbox and number box filled by needed values, while combobox is filled by first value.

2. If I will run the combobox data bind function as the first line inside editIngridient function - all works good.

Please point me to my stupidity.

Thanks a lot!

解决方案

YOu didnt say what is your dataSource, but I assume thats DataTable, so you can do it:

DataRowView rowData = comboBox1.SelectedItem as DataRowView;
int id = Convert.ToInt32(rowData["id"]);
string name = rowData["unit"].ToString();

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