Question

我在GridView中有一个TextBox和一个Label。我的问题是，当我更新GridView并且TextBox为空时，它会删除Label中的数据（这是有意义的）。我的问题是，是否可以保持TextBox为空并更新而不丢失任何数据？

C＃：

Private void Update()
    {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            TextBox timeR = GridView1.Rows[i].FindControl("SitUps") as TextBox;
            if (timeR.Text.Length < 10)
            {
                foreach (GridViewRow row in GridView1.Rows)
                {
                    sb.Append("UPDATE bleaTest SET SitUps = '");
                    sb.Append((row.FindControl("SitUps") as TextBox).Text);
                    sb.Append("'");
                    sb.Append(" WHERE id = ");
                    sb.Append(Convert.ToInt32((row.FindControl("ID") as Label).Text));
                    sb.Append(" ");

                }
            }
            else
            {
                timeR.Text = "Number is too high!";
                foreach (GridViewRow row in GridView1.Rows)
                {
                    sb.Append("UPDATE bleaTest SET SitUps = '");
                    sb.Append((row.FindControl("SitUps") as TextBox).Text);
                    sb.Append("'");
                    sb.Append(" WHERE id = ");
                    sb.Append(Convert.ToInt32((row.FindControl("ID") as Label).Text));
                    sb.Append(" ");

                }

            }
        }



        string connectiongString = "Data Source=WSCJTCSQ1;Initial Catalog=TestDB;Persist Security Info=True;User ID=v2soft;Password=passwordv2soft";
        SqlConnection myConnection = new SqlConnection(connectiongString);
        SqlCommand myCommand = new SqlCommand(sb.ToString(), myConnection);
        myConnection.Open();
        myCommand.ExecuteNonQuery();
        myConnection.Close();
        BindData();
        }

ASPX：

 <asp:TemplateField HeaderText="Sit Ups">
        <ItemTemplate>
            <asp:TextBox ID="SitUps" runat="server" type="number" Text='<%# Eval("SitUps") %>' EnableViewState="True"></asp:TextBox></div>

        </ItemTemplate>
    </asp:TemplateField>

Answer 1

您可以将if (timeR.Text.Length < 10)更改为if (timeR.Text.Length < 10 and timeR.Text.Length > 0)

Answer 2

我在这里找到了问题的代码：

StringBuilder sb = new StringBuilder();


                foreach (GridViewRow row in GridView1.Rows)
                {
                    TextBox tR = row.FindControl("SitUps") as TextBox;
                    if(tR.Text != "")
                    {
                    sb.Append("UPDATE bleaTest SET SitUps = '");
                    sb.Append((row.FindControl("SitUps") as TextBox).Text);
                    sb.Append("'");
                    sb.Append(" WHERE id = ");
                    sb.Append(Convert.ToInt32((row.FindControl("ID") as Label).Text));
                    sb.Append(" ");
                    string connectiongString = "Data Source=WSCJTCSQ1;Initial Catalog=TestDB;Persist Security Info=True;User ID=v2soft;Password=passwordv2soft";
                    SqlConnection myConnection = new SqlConnection(connectiongString);
                    SqlCommand myCommand = new SqlCommand(sb.ToString(), myConnection);
                    myConnection.Open();
                    myCommand.ExecuteNonQuery();
                    myConnection.Close();

                    }

                }
        BindData();
        }

我清理了代码，现在检查文本是否为空并继续更新。

谢谢！

TextBox删除GridView数据为空

2 个答案: