GridView数据问题（急）
最近在做网页的时候发现个问题，整了好久都不能解决！
GridView的Datasource是手动指向SqlDatasource的
<html> 中的SqlDatasource
如下
<asp:SqlDataSource ID= "SqlDataSource1 " runat= "server " ConnectionString= " <%$ ConnectionStrings:123099DBConnectionString %> "
InsertCommand= "INSERT INTO [asUsers] ([asName], [asPhone], [asRole], [asSex]) VALUES (@asName, @asPhone, @asRole, @asSex) "
SelectCommand= "SELECT [asId], [asName], [asPhone], [asRole], [asSex] FROM [asUsers] "
UpdateCommand= "UPDATE [asUsers] SET [asName] = @asName, [asPhone] = @asPhone, [asRole] = @asRole, [asSex] = @asSex WHERE [asId] = @asId "
DeleteCommand= "DELETE FROM [asUsers] WHERE [asId] = @asId "
>
<DeleteParameters>
<asp:Parameter Name= "asId " Type= "Int32 " />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name= "asName " Type= "String " />
<asp:Parameter Name= "asPhone " Type= "Int32 " />
<asp:Parameter Name= "asRole " Type= "Int32 " />
<asp:Parameter Name= "asSex " Type= "Int32 " />
<asp:Parameter Name= "asId " Type= "Int32 " />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name= "asName " Type= "String " />
<asp:Parameter Name= "asPhone " Type= "Int32 " />
<asp:Parameter Name= "asRole " Type= "Int32 " />
<asp:Parameter Name= "asSex " Type= "Int32 " />
</InsertParameters>
</asp:SqlDataSource>
cs代码中GridView的更新代码如下
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = System.Configuration.ConfigurationSettings.AppSettings[ "ConnectionString "].ToString();
SqlCommand cmd = new SqlCommand();
string namestr = " ", role = " ", asid = " ", phone = " ", Sex = " ";
GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
TextBox Name = (TextBox)row.FindControl( "TextBox10 ");
DropDownList rol = (DropDownList)row.FindControl( "DropDownList1 ");
TextBox pho = (TextBox)row.FindControl( "TextBox2 ");
Label sex = (Label)row.FindControl( "Label5 ");
asid = GridView1.DataKeys[e.RowIndex].Value.ToString();
namestr = Name.Text.Trim();
role = rol.SelectedValue.ToString();
phone = pho.Text.Trim();
Sex = sex.Text.Trim();
string str = "update asUsers set asName= ' "+namestr+ " ',asSex= ' "+Sex+ " ',asRole= ' "+role+ " ',asPhone= ' "+phone+ " 'where asId= ' "+asid+ " ' ";
cmd.CommandText = str;
cmd.Connection = con;
try
{
con.Open();
cmd.ExecuteNonQuery();
if (cmd.ExecuteNonQuery() > 0)
{
System.Windows.Forms.MessageBox.Show( "更新成功！ ");
}
else
{
System.Windows.Forms.MessageBox.Show( "更新失败！ ");
}
}
catch (Exception ee)
{
System.Windows.Forms.MessageBox.Show(ee.ToString());
}
finally
{
con.Close();
}
GridView1.EditIndex = -1;
为什么每次这个更新方法刚刚结束，就报错：asRole不能为空，但是数据库中的数据又是更新老的
[解决办法]
System.Windows.Forms.MessageBox.Show(ee.ToString());
＝＝＝＝＝＝＝
太强老， 又见 Web 中使用 WinForm
[解决办法]
整个过程 很杂乱, 既然用到了 Sqldatasource 也用到了自带 各种 更新 添加 删除 命令 为何有 在代码中 从写一个 更新方法呢? 并且一个很简单的 事 你把它弄的 过与复杂. 要不用sqldatasource 里的 更新方法, 要不自己编写 代码.
下面写一个 简单的例子:
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
sqlcon=new SqlConnection(strcon);//前面省略
string sql= "update table set name= ' "+((TextBox)(GridView1.Rows[e.RowIndex].Controls[0])).Text.ToString().Trim()+ " ',sex= ' "+ " ',Where id= ' "+GridView1.DataKeys[e.RowIndex].Value.Tostring()+ " ' ";
SqlCommand com=new SqlCommand(sql,sqlcon);
sqlcon.open();
com.ExecuteNonQuery();
sqlcon.close();
GridView1.Databind();
}
要不直接用UpdateCommand 命令:
UpdateCommand= "Update table set name=@name,sex=@sex where id=@id "
其实 这样写 就够啦,这样就可以直接 在GridView 上面 更新
如果想 用自己指定的 控件里的 值更新 GridView
再添加代码
<UpdataParamter>
<asp:ControlParamter ControlId= "Name1 " name= "name " Property= "Text "/>
.......
......
<UpdataParamter>
当然还有好多种 方法,还是自己慢慢 学习吧,上面只是大概写写,希望能对你 有点帮助.
