Question

我在C＃表单上有一个datagridview，它有很多行。选择选项和复选框。

如果我使用复选框选择选择10行，我需要将列选择行值传递给SQL查询以过滤来自另一个表的记录。

以下是我的编码但不起作用我不知道如何解决这个问题。

private void button1_Click(object sender, EventArgs e)
{
     SqlConnection conn1 = new SqlConnection(@"Data Source=.\sqlexpress;Initial Catalog=acc;Integrated Security=True");
     SqlCommand cmd1 = new SqlCommand(@"select db.date,db.type,db.refno,db.itmcod,db.qty,db.cuscod, db.cstcod,cus.cusnam INTO ##wec from fstktxn as db INNER JOIN fcustomer as cus on db.cuscod = cus.cuscod where itmcod = "dataGridView1.Rows[j].Cells["title"].Value", ", conn1);

     conn1.Open();
     cmd1.ExecuteNonQuery();

     SqlBulkCopy bulkCopy = new SqlBulkCopy(conn1);
     bulkCopy.DestinationTableName = "##tmp1";

     conn1.Close();
}

有没有使用gridview选择过滤数据的解决方案？

Answer 1

如果我理解你的要求你应该这样做。

首先获取datagridveiw数据。

DataTable data=datfridviewname.DataSource as DataTable;
                con.Open();
                SqlBulkCopy sbc = new SqlBulkCopy(con);
                sbc.DestinationTableName = @"tableName";
                sbc.WriteToServer(data);

Answer 2

尝试阅读How to use parameterised queries in SQL

它显示了如何安全地将变量添加到您的查询中

Answer 3

我认为您要问的是“我如何使用java.lang.NoClassDefFoundError: org/apache/http/auth/Credentials at org.openqa.selenium.remote.HttpCommandExecutor.getDefaultClientFactory(HttpCommandExecutor.java:89) at org.openqa.selenium.remote.HttpCommandExecutor.<init>(HttpCommandExecutor.java:63) at org.openqa.selenium.remote.HttpCommandExecutor.<init>(HttpCommandExecutor.java:58) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:155) at com.fieldforce.test.testSample.setUp(testSample.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140) Caused by: java.lang.ClassNotFoundException: org.apache.http.auth.Credentials at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 24 more java.lang.NullPointerException at com.fieldforce.test.testSample.tearDown(testSample.java:44) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)中的选定行来形成DataGridView查询？”。假设这是尝试，你应该把它分成两个步骤：

获取（在UI中）应在in查询
撰写并创建in查询

第一步可以通过迭代in的{{1}}，并检查（{推荐）.Rows DataGridView的{{1}}值来完成;如果选中：将过滤器值添加到某个列表中。例如：

.Checked

第二步更复杂，除非你使用像“dapper”这样的自动化工具。如果你使用“dapper”，你可以使用：

DataGridViewCheckBoxColumn

和就是它。如果没有，您需要手动编写命令，例如：

List<string> titles = new List<string>();
foreach (GridViewRow row in dataGridView1.Rows)  
{  
    if(row.Cells["CheckBoxColumnName"].Value == true)
    {
        titles.Add((string)row.Cells["TitleColumnName"].Value);
    }
}

然后像往常一样执行命令。您可能也需要考虑零情况;应该是所有行吗？没有行？

Answer 4

如果您尝试获取所选的复选框行，那么使用它可以获得它

 protected void button1_Click(object sender, EventArgs e)  
    {  
        foreach (GridViewRow gvrow in dataGridView1.Rows)  
        {  
            CheckBox chk = (CheckBox)gvrow.FindControl("chkSelect");  
            if (chk != null & chk.Checked)  
            {  
                SqlConnection conn1 = new SqlConnection(@"Data Source=.\sqlexpress;Initial Catalog=acc;Integrated Security=True");
                SqlCommand cmd1 = new SqlCommand(@"select db.date,db.type,db.refno,db.itmcod,db.qty,db.cuscod, db.cstcod,cus.cusnam INTO ##wec from fstktxn as db INNER JOIN fcustomer as cus on db.cuscod = cus.cuscod where itmcod = "dataGridView1.Cells["title"].Value", ", conn1);
                conn1.Open();
                cmd1.ExecuteNonQuery();
               SqlBulkCopy bulkCopy = new SqlBulkCopy(conn1);
               bulkCopy.DestinationTableName = "##tmp1";
               conn1.Close();//Do something 
            }  
        }         
    }

如何将c＃datagridview选定的单元格值传递给SQL查询

4 个答案: