SelectedIndex无效，因为它不存在于项列表中。参数名称 [英] SelectedIndex which is invalid because it does not exist in the list of items. Parameter name

问题描述

任何人都可以请我解决这个问题....那就是我收到的错误

-----------错误---- ------------------

 {'DDLShipmentType'有一个无效的SelectedIndex，因为它不存在于items.\\ n参数名称：value} 

-------------------- ----------------------------



附近

 cmb_ShipmentType.SelectedIndex = 0; 
 

我在下面的代码中将selectedindex作为-1

  public   void  PopulateShipmentType（DropDownList cmb_ShipmentType）
 {
  string  Sql =  从xxx中选择a，b，其中NUIsActive = 1; 
 使用（DataView Source =  new  DataView（objDBLib.ExecuteQuery（Sql）.Tables [< span class =code-digit> 0 ]））
 {
 cmb_ShipmentType.DataSource = Source; 
 cmb_ShipmentType.DataTextField =   a; 
 cmb_ShipmentType.DataValueField =   b; 
 cmb_ShipmentType.DataBind（）; 
 
 cmb_ShipmentType.SelectedIndex =  0 ; 
} 
} 

解决方案

在上面的情况中，Source不会返回任何行。 />
因此无法为SelectedIndex设置值，因为无法选择。



如果有任何条目，请检查您的表。

Hi can any one please me to resolve this issue....that is i'm getting the error as
-----------Error----------------------

{"'DDLShipmentType' has a SelectedIndex which is invalid because it does not exist in the list of items.\r\nParameter name: value"}

------------------------------------------------

near

cmb_ShipmentType.SelectedIndex = 0;

i'm getting the selectedindex as -1 in the below code

public void PopulateShipmentType(DropDownList cmb_ShipmentType)
       {
           string Sql = "select a,b from xxx where NUIsActive=1";
           using (DataView Source = new DataView(objDBLib.ExecuteQuery(Sql).Tables[0]))
           {
               cmb_ShipmentType.DataSource = Source;
               cmb_ShipmentType.DataTextField = "a";
               cmb_ShipmentType.DataValueField = "b";
               cmb_ShipmentType.DataBind();
               
              cmb_ShipmentType.SelectedIndex = 0;
           }
       }

解决方案

In your above Situation "Source" doesn't return any rows.
So it can't set a value for SelectedIndex because there is nothing to select.

Check your Table if there are any entries.

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