CommandText属性尚未在gridview中初始化错误

时间:2015-05-27 20:44:01

标签: c# ado.net sqlcommand

我有一个gridview,我想检查插入行但是我看到了这个错误:

  

CommandText属性尚未初始化。

我想我对strArrays的错误。我在这工作了两天

我该如何修复?

StringBuilder stringBuilder = new StringBuilder(string.Empty);
SqlConnection sqlConnection = new  SqlConnection(ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString.ToString());
SqlCommand sqlCommand = new SqlCommand();
for (int i = 0; i < GridView1.Rows.Count; i++)
{
   int type = 2;
   CheckBox chkUpdate = (CheckBox)GridView1.Rows[i].Cells[0].FindControl("chkSelect");

   TextBox txtAmount = (TextBox)GridView1.Rows[i].Cells[5].FindControl("txtAmount");

   if (chkUpdate != null)
   {
      if (chkUpdate.Checked)
      {
         string strID = GridView1.Rows[i].Cells[1].Text;
         GridView1.Rows[i].FindControl("txtLocation")).Text;
         string text = this.GridView1.Rows[i].Cells[1].Text;
         string[] strArrays = new string[] { "INSERT INTO [OrderCancel]
                                             ([OrderID], 
                                              [Message], 
                                              [Type],
                                              [RelationProductID],
                                              [Amount]) 
                                              VALUES(" , 
                                              Request.QueryString["o"] ,
                                              ",'" , txtWhy.Text , 
                                              "',",type.ToString(),",
                                              " , strID , "," , 
                                              txtAmount.Text , ");" };
         stringBuilder.Append(string.Concat(strArrays));

         //append update statement in stringBuilder 
         stringBuilder.Append(string.Concat(strArrays));
      }
   }
   try
   {
      try
      {
         sqlCommand.CommandType = CommandType.Text;
         sqlCommand.CommandText = stringBuilder.ToString();
         sqlCommand.Connection = sqlConnection;
         sqlConnection.Open();
         sqlCommand.ExecuteNonQuery();
      }
      catch (SqlException sqlException)
      {
         throw new Exception(string.Concat("Error in Updation",
                                            sqlException.Message));
      }
   }
   finally
   {
      sqlConnection.Close();
   }     

2 个答案:

答案 0 :(得分:1)

您的代码可以清理,您可以执行以下操作:

private readonly string dbConnection = "...";
private const string query = "... Column = @Column";

为了简洁起见,我添加了 ... ,它将与您的连接字符串和带参数的查询相关联。

var message = String.Empty;
using(var connection = new SqlConnection(dbConnection))
     using(var command = new SqlCommand(query, dbConnection))
     {
          connection.Open();
          command.CommandType =  CommandType.Text;
          command.Parameters.Add("@Column", SqlDbType.NVarChar).Value = message;
          command.ExecuteNonQuery();
     }

因此,小片段将位于方法内部,该方法将传递网格中的数据模型。然后,当您从Grid传递一个值时,您将构建模型并传递给将写入数据库的方法。

此外,当您使用StringBuilder时,您还需要致电ToString();以确保在您使用时string而不是StringBuilder

答案 1 :(得分:0)

如果未设置commandText属性,通常会发生此错误。看看你的代码看起来你的stringbuilder变量没有设置。你试过在你的&#34; chkUpdate.Checked&#34;中加入一个断点吗?环?如果是,你可以发布在你的循环中构建的sql