怎么获得DropDownList中的DataValueField(guid类型)

Question

        using (OfficeChannel.OfficeChannelDataContext MyCon = new OfficeChannel.OfficeChannelDataContext(ConfigurationManager.ConnectionStrings["OfficeChannelConnectionString_Web"].ConnectionString))
        {
            var linqTxt = from i in MyCon.Class_BigType
                          select new
                          {
                              BigId=i.classBigID,
                              BigTxt = i.classBigType
                          };
            DropDownList1.DataSource = linqTxt;
            DropDownList1.DataValueField = "BigId";
            DropDownList1.DataBind();    protected void Button1_Click(object sender, EventArgs e)
    {
      //怎么获得DropDownList1.DataValueField = "BigId"的值
    }

Answer 1

没明白什么意思，你绑定了这个字段，那么每个项的value就是这个字段的值啊。
比如DropDownList1.SelectedItem.value

Answer 2

int.Parse(DropDownList1.SelectedValue)

Answer 3

object obj=DropDownList1.SelectedValue;string value=obj.ToString();
int intValue=int.Paser(obj);
string aa=DropDownList1.SelectedValue.ToString();

Answer 4

 using (OfficeChannel.OfficeChannelDataContext MyCon = new OfficeChannel.OfficeChannelDataContext(ConfigurationManager.ConnectionStrings["OfficeChannelConnectionString_Web"].ConnectionString))
            {
                string DSTID = DropDownList1.SelectedIndex.ToString();//它读出来的不是Guid 出错了
                Guid ClassID = new Guid(DSTID);
            }
//DropdownList绑定
    public void DropDownLintBind()
    {
        using (OfficeChannel.OfficeChannelDataContext MyCon = new OfficeChannel.OfficeChannelDataContext(ConfigurationManager.ConnectionStrings["OfficeChannelConnectionString_Web"].ConnectionString))
        {
            var linqTxt = from i in MyCon.Class_BigType
                          select new
                          {
                              BigId=i.classBigID,
                              BigTxt = i.classBigType
                          };
            DropDownList1.DataSource = linqTxt;
            DropDownList1.DataValueField = "BigId";
            DropDownList1.DataTextField = "BigTxt";
            DropDownList1.DataBind();
        }    }

Answer 5

DropDownList1.DataSource = linqTxt; 
DropDownList1.DataValueField = "BigId";  //id
this.DropDownList1.DataTextField="BigName";//显示的文本字段
DropDownList1.DataBind(); 
//取当前选择的值
DropDownList1.SelectedValue  //当前选中项的BigId
DropDownList1.SelectedItem   //当前选中项的BigName

Answer 6

DropDownList1.DataValueField = "BigId"; 
我想要的是这个值

Answer 7

int.Parse(DropDownList1.SelectedValue)就是取的这个值

Answer 8

在绑定和时候要加上
DropDownList1.DataTextField = "BigText";
在获取值的时候 
DropDownList1.SelectedItem.value就是你所选择值的value了

Answer 9

我的值都是GUID 类型的 为什么我跟踪出来的值是 0 1 2出错信息 GUID 应包含带 4 个短划线的 32 位数(xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)。

Answer 10

我的值都是GUID 类型的 为什么我跟踪出来的值是 0 1 2出错信息 GUID 应包含带 4 个短划线的 32 位数(xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)。

Answer 11

7b4c07b4-f329-488e-8d41-9ed6645f248d78bf979f-a63d-4dda-883d-e6f41c66fa19dfc9f246-3aae-4b64-9b2d-f08a6e8181c9