public const int SIM_CAPSTYPE_ALL = 0x3F; // 所有联系人
public const int SIM_PBSTORAGE_SIM = 0x10; //
public const int SIM_SMSSTORAGE_SIM = 0x2; //

[DllImport("cellcore.dll")]
public static extern int SimInitialize(uint dwFlags,
int lpfnCallBack, uint dwParam, ref int lphSim);

[DllImport("cellcore.dll")]
public static extern int SimGetPhonebookStatus(int hSim,
uint dwLocation, ref uint lpdwUsed, ref uint lpdwTotal);

[DllImport("cellcore.dll")]
public static extern int SimGetDevCaps(int hSim,
uint dwCapsType, ref SimCaps lpSimCaps);

[DllImport("cellcore.dll")]
public static extern int SimGetSmsStorageStatus(int hSim,
uint dwStorage, ref uint lpdwUsed, ref uint lpdwTotal);

[DllImport("cellcore.dll")]
public static extern int SimDeinitialize(int hSim);

[DllImport("cellcore.dll")]
public static extern int SimReadPhonebookEntry(int hSim, uint dwLocation, uint dwIndex, ref SIMPHONEBOOKENTRY entry);

[StructLayout(LayoutKind.Sequential)]
public struct SimCaps
{
public uint cbSize;
public uint dwParams;
public uint dwPBStorages;
public uint dwMinPBIndex;
public uint dwMaxPBIndex;
public uint dwMaxPBEAddressLength;
public uint dwMaxPBETextLength;
public uint dwLockFacilities;
public uint dwReadMsgStorages;
public uint dwWriteMsgStorages;
public uint dwNumLockingPwdLengths;
public SimLockingPwdLength rgLockingPwdLengths0;
public SimLockingPwdLength rgLockingPwdLengths1;
public SimLockingPwdLength rgLockingPwdLengths2;
public SimLockingPwdLength rgLockingPwdLengths3;
public SimLockingPwdLength rgLockingPwdLengths4;
public SimLockingPwdLength rgLockingPwdLengths5;
public SimLockingPwdLength rgLockingPwdLengths6;
public SimLockingPwdLength rgLockingPwdLengths7;
public SimLockingPwdLength rgLockingPwdLengths8;
public SimLockingPwdLength rgLockingPwdLengths9;
}

//很多文章都缺失的结构

[StructLayout(LayoutKind.Sequential)]
public struct SimLockingPwdLength
{
public uint dwFacility;
public uint dwPasswordLength;
}

//很多文章都缺失的结构

[StructLayout(LayoutKind.Sequential)]
public struct SIMPHONEBOOKENTRY
{
public uint cbSize; //
public uint dwParams; //
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
public string lpszAddress; // 联系人电话
public uint dwAddressType; //
public uint dwNumPlan; //
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
public string lpszText; // 联系人姓名
}

/// <summary>
/// 获取SIM卡联系人信息
/// </summary>
/// <returns></returns>
public static List<string[]> GetSIMContactList()
{
int hSim = 0;
List<string[]> list = new List<string[]>();
try
{
int result = SimInitialize(0, 0, 0, ref hSim);
if (result != 0)
throw new Exception("SIM打卡失败，请检测SIM是否安装！");
uint uiUsed = 0;
uint uiTotal = 0;
result = SimGetPhonebookStatus(hSim, SIM_PBSTORAGE_SIM, ref uiUsed, ref uiTotal);

for (int i = 1; i <= uiUsed; i++)
{
SIMPHONEBOOKENTRY entry = new SIMPHONEBOOKENTRY();
entry.cbSize = (uint)Marshal.SizeOf(typeof(SIMPHONEBOOKENTRY));
result = SimReadPhonebookEntry(hSim, SIM_PBSTORAGE_SIM, (uint)i, ref entry);
list.Add(new string[2] { entry.lpszText.Trim(), entry.lpszAddress.Trim() });
}
return list;

}
catch
{
throw;
}
finally
{
SimDeinitialize(hSim);

}
}

List<string[]> list = SIMWrap.GetSIMContactList();
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("姓名", typeof(string)));
dt.Columns.Add(new DataColumn("号码", typeof(string)));

string[] str;
for(int i = 0; i < list.Count; i++)
{
str = list[i];
DataRow dr = dt.NewRow();
dr[0] = str[0].ToString();
dr[1] = str[1].ToString();
dt.Rows.Add(dr);

}

dataGrid1.DataSource = dt;