本文整理汇总了C#中SqlCommand.Clear方法的典型用法代码示例。如果您正苦于以下问题：C# SqlCommand.Clear方法的具体用法？C# SqlCommand.Clear怎么用？C# SqlCommand.Clear使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SqlCommand的用法示例。
在下文中一共展示了SqlCommand.Clear方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: CodeCoverageSqlClient
public static void CodeCoverageSqlClient()
{
SqlParameterCollection opc = new SqlCommand().Parameters;
Assert.True(opc.Count == 0, string.Format("FAILED: Expected count: {0}. Actual count: {1}.", 0, opc.Count));
Assert.False(((IList)opc).IsReadOnly, "FAILED: Expected collection to NOT be read only.");
Assert.False(((IList)opc).IsFixedSize, "FAILED: Expected collection to NOT be fixed size.");
Assert.False(((IList)opc).IsSynchronized, "FAILED: Expected collection to NOT be synchronized.");
DataTestClass.AssertEqualsWithDescription("Object", ((IList)opc).SyncRoot.GetType().Name, "FAILED: Incorrect SyncRoot Name");
{
string failValue;
DataTestClass.AssertThrowsWrapper<IndexOutOfRangeException>(() => failValue = opc[0].ParameterName, "Invalid index 0 for this SqlParameterCollection with Count=0.");
DataTestClass.AssertThrowsWrapper<IndexOutOfRangeException>(() => failValue = opc["@p1"].ParameterName, "An SqlParameter with ParameterName '@p1' is not contained by this SqlParameterCollection.");
}
DataTestClass.AssertThrowsWrapper<ArgumentNullException>(() => opc.Add(null), "The SqlParameterCollection only accepts non-null SqlParameter type objects.");
opc.Add((object)new SqlParameter());
IEnumerator enm = opc.GetEnumerator();
Assert.True(enm.MoveNext(), "FAILED: Expected MoveNext to be true");
DataTestClass.AssertEqualsWithDescription("Parameter1", ((SqlParameter)enm.Current).ParameterName, "FAILED: Incorrect ParameterName");
opc.Add(new SqlParameter());
DataTestClass.AssertEqualsWithDescription("Parameter2", opc[1].ParameterName, "FAILED: Incorrect ParameterName");
opc.Add(new SqlParameter(null, null));
opc.Add(new SqlParameter(null, SqlDbType.Int));
DataTestClass.AssertEqualsWithDescription("Parameter4", opc["Parameter4"].ParameterName, "FAILED: Incorrect ParameterName");
opc.Add(new SqlParameter("Parameter5", SqlDbType.NVarChar, 20));
opc.Add(new SqlParameter(null, SqlDbType.NVarChar, 20, "a"));
opc.RemoveAt(opc[3].ParameterName);
DataTestClass.AssertEqualsWithDescription(-1, opc.IndexOf(null), "FAILED: Incorrect index for null value");
SqlParameter p = opc[0];
DataTestClass.AssertThrowsWrapper<ArgumentException>(() => opc.Add((object)p), "The SqlParameter is already contained by another SqlParameterCollection.");
DataTestClass.AssertThrowsWrapper<ArgumentException>(() => new SqlCommand().Parameters.Add(p), "The SqlParameter is already contained by another SqlParameterCollection.");
DataTestClass.AssertThrowsWrapper<ArgumentNullException>(() => opc.Remove(null), "The SqlParameterCollection only accepts non-null SqlParameter type objects.");
string pname = p.ParameterName;
p.ParameterName = pname;
p.ParameterName = pname.ToUpper();
p.ParameterName = pname.ToLower();
p.ParameterName = "@p1";
p.ParameterName = pname;
opc.Clear();
opc.Add(p);
opc.Clear();
opc.AddWithValue("@p1", null);
DataTestClass.AssertEqualsWithDescription(-1, opc.IndexOf(p.ParameterName), "FAILED: Incorrect index for parameter name");
opc[0] = p;
DataTestClass.AssertEqualsWithDescription(0, opc.IndexOf(p.ParameterName), "FAILED: Incorrect index for parameter name");
Assert.True(opc.Contains(p.ParameterName), "FAILED: Expected collection to contain provided parameter.");
Assert.True(opc.Contains(opc[0]), "FAILED: Expected collection to contain provided parameter.");
opc[0] = p;
opc[p.ParameterName] = new SqlParameter(p.ParameterName, null);
opc[p.ParameterName] = new SqlParameter();
opc.RemoveAt(0);
new SqlCommand().Parameters.Clear();
new SqlCommand().Parameters.CopyTo(new object[0], 0);
Assert.False(new SqlCommand().Parameters.GetEnumerator().MoveNext(), "FAILED: Expected MoveNext to be false");
DataTestClass.AssertThrowsWrapper<InvalidCastException>(() => new SqlCommand().Parameters.Add(0), "The SqlParameterCollection only accepts non-null SqlParameter type objects, not Int32 objects.");
DataTestClass.AssertThrowsWrapper<InvalidCastException>(() => new SqlCommand().Parameters.Insert(0, 0), "The SqlParameterCollection only accepts non-null SqlParameter type objects, not Int32 objects.");
DataTestClass.AssertThrowsWrapper<InvalidCastException>(() => new SqlCommand().Parameters.Remove(0), "The SqlParameterCollection only accepts non-null SqlParameter type objects, not Int32 objects.");
DataTestClass.AssertThrowsWrapper<ArgumentException>(() => new SqlCommand().Parameters.Remove(new SqlParameter()), "Attempted to remove an SqlParameter that is not contained by this SqlParameterCollection.");
}