请教 :::DropDownList ddlGangwei = (DropDownList)(this.DataGrid1.Items[e.Item.ItemIndex].FindControl("ddlGangwei"));报错 :: 未将对象引用设置到对象的实例跟踪发现 定义的 DropDownList 为 未定义 为什么找不到 DataGrid中的 DropDownList呢。=======================================
函数代码如下:
private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
strOldGangwei = ((Label)(e.Item.FindControl("lblGangwei"))).Text.ToString();
this.DataGrid1.EditItemIndex = e.Item.ItemIndex;
DropDownList ddlGangwei = (DropDownList)e.Item.FindControl("ddlGangwei");
try
{
if ( strConnection.State == System.Data.ConnectionState.Closed )
{
strConnection.Open();
}
string strSQL = "select distinct 岗位名称 from DBgangwei";
SqlDataAdapter myComm = new SqlDataAdapter( strSQL,strConnection );
DataSet myDS = new DataSet(); myComm.Fill(myDS,"temp");
ddlGangwei.DataSource = myDS.Tables["temp"].DefaultView;
ddlGangwei.DataTextField = myDS.Tables["temp"].Columns[0].ToString();
ddlGangwei.DataValueField = myDS.Tables["temp"].Columns[0].ToString();
ddlGangwei.Items.Add(new ListItem("-请选择-","0")); ddlGangwei.DataBind();
}
catch( Exception Error )
{
Response.Write("<scipt>alert('"+Error.ToString()+"!')</script>");
}
}
函数代码如下:
private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
strOldGangwei = ((Label)(e.Item.FindControl("lblGangwei"))).Text.ToString();
this.DataGrid1.EditItemIndex = e.Item.ItemIndex;
DropDownList ddlGangwei = (DropDownList)e.Item.FindControl("ddlGangwei");
try
{
if ( strConnection.State == System.Data.ConnectionState.Closed )
{
strConnection.Open();
}
string strSQL = "select distinct 岗位名称 from DBgangwei";
SqlDataAdapter myComm = new SqlDataAdapter( strSQL,strConnection );
DataSet myDS = new DataSet(); myComm.Fill(myDS,"temp");
ddlGangwei.DataSource = myDS.Tables["temp"].DefaultView;
ddlGangwei.DataTextField = myDS.Tables["temp"].Columns[0].ToString();
ddlGangwei.DataValueField = myDS.Tables["temp"].Columns[0].ToString();
ddlGangwei.Items.Add(new ListItem("-请选择-","0")); ddlGangwei.DataBind();
}
catch( Exception Error )
{
Response.Write("<scipt>alert('"+Error.ToString()+"!')</script>");
}
}
你在编辑项里没放置dropdowlist控件。
你右键单击datagrid。编辑你那个模板列。
在编辑项里也加上dropdownlist控件
在 EditItemTemplate 中 放了一个 DropDownList (ddlGrangwei)