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我想对数据库进行一次调用（包含几个 SELECT 语句），然后将结果数据绑定到多个组件。

我正在使用 DataSet 和 SqlDataAdapter 填充然后绑定到组件的表。

问题是第一个 SELECT 语句的结果被放入两个表中，因此当我尝试在第二个组件上使用第二批数据时出现“'System.Data.DataRowView' 不包含属性...”错误.

我是否误解了这是如何工作的？

DataSet ds = new DataSet();

SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["myString"].ConnectionString);

StringBuilder topicDropDownListSQL = new StringBuilder();
topicDropDownListSQL.Append("SELECT topic.topic_ID, topic.topic_title FROM FPL2012_TOPIC as topic WHERE topic.topic_isEnabled = 1;");
topicDropDownListSQL.Append("SELECT explain.itemExplanationType_ID, explain.itemExplanationType_type FROM FPL2012_ITEM_EXPLANATION_TYPE as explain;");

SqlDataAdapter da = new SqlDataAdapter(topicDropDownListSQL.ToString(), connection);

ds.Tables.Add("Topics");
ds.Tables.Add("ExplainType");

ds.EnforceConstraints = false;

ds.Tables["Topics"].BeginLoadData();
da.Fill(ds.Tables[0]);
ds.Tables["Topics"].EndLoadData();

ds.Tables["ExplainType"].BeginLoadData();
da.Fill(ds.Tables[1]);
ds.Tables["ExplainType"].EndLoadData();

topicDropDownList.DataValueField = "topic_ID";
topicDropDownList.DataTextField = "topic_title";
topicDropDownList.DataSource = ds.Tables["Topics"];
topicDropDownList.DataBind();

explanationTypeDropDownList.DataValueField = "itemExplanationType_ID";
explanationTypeDropDownList.DataTextField = "itemExplanationType_type";
explanationTypeDropDownList.DataSource = ds.Tables["ExplainType"];
explanationTypeDropDownList.DataBind();

connection.Close();
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2 回答 2

1

您可以通过那里的索引而不是那里的名称来使用这个访问表

 DataSet ds = new DataSet();

SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["myString"].ConnectionString);

String qry="SELECT topic_ID,topic_title FROM FPL2012_TOPIC WHERE topic_isEnabled = 1; SELECT itemExplanationType_ID, itemExplanationType_type FROM FPL2012_ITEM_EXPLANATION_TYPE ";

SqlDataAdapter da = new SqlDataAdapter(qry, connection);

da.Fill(ds)

topicDropDownList.DataValueField = "topic_ID";
topicDropDownList.DataTextField = "topic_title";
topicDropDownList.DataSource = ds.Tables[0];
topicDropDownList.DataBind();

explanationTypeDropDownList.DataValueField = "itemExplanationType_ID";
explanationTypeDropDownList.DataTextField = "itemExplanationType_type";
explanationTypeDropDownList.DataSource = ds.Tables[1];
explanationTypeDropDownList.DataBind();

connection.Close();
于 2013-09-04T09:09:13.530 回答
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好的，接下来我尝试使用数据读取器，没想到它会起作用，但确实如此！我可以制作多个 select 语句，然后填充多个组件。我没有将此标记为答案，因为我仍然认为知道如何使用数据集进行操作会很有用。

对我有用的新代码（如果有用的话）：

string connectionString = WebConfigurationManager.ConnectionStrings["myString"].ConnectionString;
SqlConnection connection = new SqlConnection(connectionString);

StringBuilder sql = new StringBuilder();
sql.Append("SELECT topic.topic_ID, topic.topic_title FROM FPL2012_TOPIC as topic WHERE topic.topic_isEnabled = 1;");
sql.Append("SELECT explain.itemExplanationType_ID, explain.itemExplanationType_type FROM FPL2012_ITEM_EXPLANATION_TYPE as explain;");

SqlCommand command = new SqlCommand(sql.ToString(), connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();

topicDropDownList.DataSource = reader;
topicDropDownList.DataValueField = "topic_ID";
topicDropDownList.DataTextField = "topic_title";
topicDropDownList.DataBind();

reader.NextResult();

explanationTypeDropDownList.DataSource = reader;
explanationTypeDropDownList.DataValueField = "itemExplanationType_ID";
explanationTypeDropDownList.DataTextField = "itemExplanationType_type";
explanationTypeDropDownList.DataBind();

reader.Close();
connection.Close();
于 2013-09-04T09:12:26.397 回答